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[o]" accesskey="o" class="">Mewngofnodi</a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Rhagor o opsiynau" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Offer personol" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" > Offer personol </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal" title="Dewislen defnyddiwr" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="https://donate.wikimedia.org/?wmf_source=donate&wmf_medium=sidebar&wmf_campaign=cy.wikipedia.org&uselang=cy">Rhoi</a></li><li id="pt-contribute" class="mw-list-item"><a href="/wiki/Arbennig:Contribute"> Cyfrannu</a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Arbennig:CreateAccount&returnto=Cymorth%3ACS1+errors" title="Rydym yn argymell eich bod yn creu cyfri ac yn menwgofnodi. Fodd bynnag, dydy hyn ddim yn orfodol"> Creu cyfrif</a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Arbennig:UserLogin&returnto=Cymorth%3ACS1+errors" title="Fe'ch anogir i fewngofnodi, er nad oes rhaid gwneud. [o]" accesskey="o"> Mewngofnodi</a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Tudalennau ar gyfer golygyddion allgofnodedig <a href="/wiki/Cymorth:Cyflwyniad" aria-label="Dysgu mwy am olygu">dysgu mwy</a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Arbennig:MyTalk" title="Sgwrs ynglŷn â golygiadau o'r cyfeiriad IP hwn [n]" accesskey="n">Sgwrs</a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Safle"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Cynnwys" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Cynnwys</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">symud i'r bar ochr</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">cuddio</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Y dechrau</div> </a> </li> <li id="toc-Controlling_error_message_display" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Controlling_error_message_display"> <div class="vector-toc-text"> 1 Controlling error message display </div> </a> <ul id="toc-Controlling_error_message_display-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-|accessdate=_requires_|url=" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#|accessdate=_requires_|url="> <div class="vector-toc-text"> 2 |accessdate= requires |url= </div> </a> <ul id="toc-|accessdate=_requires_|url=-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-|archiveurl=_requires_|archivedate=" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#|archiveurl=_requires_|archivedate="> <div class="vector-toc-text"> 3 |archiveurl= requires |archivedate= </div> </a> <ul id="toc-|archiveurl=_requires_|archivedate=-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-|archiveurl=_requires_|url=" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#|archiveurl=_requires_|url="> <div class="vector-toc-text"> 4 |archiveurl= requires |url= </div> </a> <ul id="toc-|archiveurl=_requires_|url=-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-|chapter=_ignored" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#|chapter=_ignored"> <div class="vector-toc-text"> 5 |chapter= ignored </div> </a> <ul id="toc-|chapter=_ignored-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Check_|arxiv=_value" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Check_|arxiv=_value"> <div class="vector-toc-text"> 6 Check |arxiv= value </div> </a> <ul id="toc-Check_|arxiv=_value-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Check_|asin=_value" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Check_|asin=_value"> <div class="vector-toc-text"> 7 Check |asin= value </div> </a> <ul id="toc-Check_|asin=_value-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Check_|authorlink=_value" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Check_|authorlink=_value"> <div class="vector-toc-text"> 8 Check |authorlink= value </div> </a> <ul id="toc-Check_|authorlink=_value-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Check_date_values_in:_|param1=,_|param2=,_..." class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Check_date_values_in:_|param1=,_|param2=,_..."> <div class="vector-toc-text"> 9 Check date values in: |param1=, |param2=, ... </div> </a> <ul id="toc-Check_date_values_in:_|param1=,_|param2=,_...-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Check_|doi=_value" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Check_|doi=_value"> <div class="vector-toc-text"> 10 Check |doi= value </div> </a> <ul id="toc-Check_|doi=_value-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Check_|isbn=_value" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Check_|isbn=_value"> <div class="vector-toc-text"> 11 Check |isbn= value </div> </a> <ul id="toc-Check_|isbn=_value-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Check_|issn=_value" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Check_|issn=_value"> <div class="vector-toc-text"> 12 Check |issn= value </div> </a> <ul id="toc-Check_|issn=_value-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Check_|lccn=_value" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Check_|lccn=_value"> <div class="vector-toc-text"> 13 Check |lccn= value </div> </a> <ul id="toc-Check_|lccn=_value-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Check_|message-id=_value" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Check_|message-id=_value"> <div class="vector-toc-text"> 14 Check |message-id= value </div> </a> <ul id="toc-Check_|message-id=_value-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Check_|ol=_value" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Check_|ol=_value"> <div class="vector-toc-text"> 15 Check |ol= value </div> </a> <ul id="toc-Check_|ol=_value-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Check_|pmc=_value" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Check_|pmc=_value"> <div class="vector-toc-text"> 16 Check |pmc= value </div> </a> <ul id="toc-Check_|pmc=_value-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Check_|pmid=_value" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Check_|pmid=_value"> <div class="vector-toc-text"> 17 Check |pmid= value </div> </a> <ul id="toc-Check_|pmid=_value-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Check_|url=_scheme" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Check_|url=_scheme"> <div class="vector-toc-text"> 18 Check |url= scheme </div> </a> <ul id="toc-Check_|url=_scheme-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Cite_uses_deprecated_parameters" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Cite_uses_deprecated_parameters"> <div class="vector-toc-text"> 19 Cite uses deprecated parameters </div> </a> <ul id="toc-Cite_uses_deprecated_parameters-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-|coauthors=_requires_|author=" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#|coauthors=_requires_|author="> <div class="vector-toc-text"> 20 |coauthors= requires |author= </div> </a> <ul id="toc-|coauthors=_requires_|author=-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-|displayeditors=_suggested" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#|displayeditors=_suggested"> <div class="vector-toc-text"> 21 |displayeditors= suggested </div> </a> <ul id="toc-|displayeditors=_suggested-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Empty_citation" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Empty_citation"> <div class="vector-toc-text"> 22 Empty citation </div> </a> <ul id="toc-Empty_citation-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Extra_|pages=_or_|at=" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Extra_|pages=_or_|at="> <div class="vector-toc-text"> 23 Extra |pages= or |at= </div> </a> <ul id="toc-Extra_|pages=_or_|at=-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-|firstn=_missing_|lastn=_in_Authors/Editors_list" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#|firstn=_missing_|lastn=_in_Authors/Editors_list"> <div class="vector-toc-text"> 24 |firstn= missing |lastn= in Authors/Editors list </div> </a> <ul id="toc-|firstn=_missing_|lastn=_in_Authors/Editors_list-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-|format=_requires_|url=" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#|format=_requires_|url="> <div class="vector-toc-text"> 25 |format= requires |url= </div> </a> <ul id="toc-|format=_requires_|url=-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Invalid_parameter_value" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Invalid_parameter_value"> <div class="vector-toc-text"> 26 Invalid parameter value </div> </a> <ul id="toc-Invalid_parameter_value-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Missing_|lastn=_in_Authors/Editors_list" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Missing_|lastn=_in_Authors/Editors_list"> <div class="vector-toc-text"> 27 Missing |lastn= in Authors/Editors list </div> </a> <ul id="toc-Missing_|lastn=_in_Authors/Editors_list-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Missing_or_empty_|title=" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Missing_or_empty_|title="> <div class="vector-toc-text"> 28 Missing or empty |title= </div> </a> <button aria-controls="toc-Missing_or_empty_|title=-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> Toglo is-adran Missing or empty |title= </button> <ul id="toc-Missing_or_empty_|title=-sublist" class="vector-toc-list"> <li id="toc-Bare_URL_without_a_title" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Bare_URL_without_a_title"> <div class="vector-toc-text"> 28.1 Bare URL without a title </div> </a> <ul id="toc-Bare_URL_without_a_title-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Citation_without_a_title_of_any_form" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Citation_without_a_title_of_any_form"> <div class="vector-toc-text"> 28.2 Citation without a title of any form </div> </a> <ul id="toc-Citation_without_a_title_of_any_form-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Missing_or_empty_|url=" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Missing_or_empty_|url="> <div class="vector-toc-text"> 29 Missing or empty |url= </div> </a> <ul id="toc-Missing_or_empty_|url=-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-More_than_one_of_|param1=,_|param2=,_and_|param3=_specified" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#More_than_one_of_|param1=,_|param2=,_and_|param3=_specified"> <div class="vector-toc-text"> 30 More than one of |param1=, |param2=, and |param3= specified </div> </a> <ul id="toc-More_than_one_of_|param1=,_|param2=,_and_|param3=_specified-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Text_"????"_ignored" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Text_"????"_ignored"> <div class="vector-toc-text"> 31 Text "????" ignored </div> </a> <ul id="toc-Text_"????"_ignored-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-|trans_chapter=_requires_|chapter=" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#|trans_chapter=_requires_|chapter="> <div class="vector-toc-text"> 32 |trans_chapter= requires |chapter= </div> </a> <ul id="toc-|trans_chapter=_requires_|chapter=-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-|trans_title=_requires_|title=" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#|trans_title=_requires_|title="> <div class="vector-toc-text"> 33 |trans_title= requires |title= </div> </a> <ul id="toc-|trans_title=_requires_|title=-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Unknown_parameter_|xxxx=_ignored" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Unknown_parameter_|xxxx=_ignored"> <div class="vector-toc-text"> 34 Unknown parameter |xxxx= ignored </div> </a> <ul id="toc-Unknown_parameter_|xxxx=_ignored-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Wikilink_embedded_in_URL_title" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Wikilink_embedded_in_URL_title"> <div class="vector-toc-text"> 35 Wikilink embedded in URL title </div> </a> <ul id="toc-Wikilink_embedded_in_URL_title-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Notes" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Notes"> <div class="vector-toc-text"> 36 Notes </div> </a> <ul id="toc-Notes-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> 37 References </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Cynnwys" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toglo'r tabl cynnwys" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" > Toglo'r tabl cynnwys </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading">Cymorth:CS1 errors</h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Ewch i erthygl mewn iaith arall. Ar gael mewn 46 iaith" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-46" aria-hidden="true" > 46 iaith </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ab mw-list-item"><a href="https://ab.wikipedia.org/wiki/%D0%90%D1%86%D1%85%D1%8B%D1%80%D0%B0%D0%B0%D1%80%D0%B0:CS1_errors" title="Ацхыраара:CS1 errors - Abchaseg" lang="ab" hreflang="ab" data-title="Ацхыраара:CS1 errors" data-language-autonym="Аԥсшәа" data-language-local-name="Abchaseg" class="interlanguage-link-target">Аԥсшәа</a></li><li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Hulp:AS1-foute" title="Hulp:AS1-foute - Affricaneg" lang="af" hreflang="af" data-title="Hulp:AS1-foute" data-language-autonym="Afrikaans" data-language-local-name="Affricaneg" class="interlanguage-link-target">Afrikaans</a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%85%D8%B3%D8%A7%D8%B9%D8%AF%D8%A9:%D8%A3%D8%AE%D8%B7%D8%A7%D8%A1_%D8%A7%D9%84%D8%A7%D8%B3%D8%AA%D8%B4%D9%87%D8%A7%D8%AF" title="مساعدة:أخطاء الاستشهاد - Arabeg" lang="ar" hreflang="ar" data-title="مساعدة:أخطاء الاستشهاد" data-language-autonym="العربية" data-language-local-name="Arabeg" class="interlanguage-link-target">العربية</a></li><li class="interlanguage-link interwiki-ary mw-list-item"><a href="https://ary.wikipedia.org/wiki/%D9%85%D8%B9%D8%A7%D9%88%D9%86%D8%A9:CS1_errors" title="معاونة:CS1 errors - Arabeg Moroco" lang="ary" hreflang="ary" data-title="معاونة:CS1 errors" data-language-autonym="الدارجة" data-language-local-name="Arabeg Moroco" class="interlanguage-link-target">الدارجة</a></li><li class="interlanguage-link interwiki-arz mw-list-item"><a href="https://arz.wikipedia.org/wiki/%D9%85%D8%B3%D8%A7%D8%B9%D8%AF%D8%A9:CS1_errors" title="مساعدة:CS1 errors - Arabeg yr Aifft" lang="arz" hreflang="arz" data-title="مساعدة:CS1 errors" data-language-autonym="مصرى" data-language-local-name="Arabeg yr Aifft" class="interlanguage-link-target">مصرى</a></li><li class="interlanguage-link interwiki-bew mw-list-item"><a href="https://bew.wikipedia.org/wiki/Pertulungan:CS1_errors" title="Pertulungan:CS1 errors - Betawi" lang="bew" hreflang="bew" data-title="Pertulungan:CS1 errors" data-language-autonym="Betawi" data-language-local-name="Betawi" class="interlanguage-link-target">Betawi</a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%B8%E0%A6%BE%E0%A6%B9%E0%A6%BE%E0%A6%AF%E0%A7%8D%E0%A6%AF:%E0%A6%89%E0%A6%A6%E0%A7%8D%E0%A6%A7%E0%A7%83%E0%A6%A4%E0%A6%BF_%E0%A6%B6%E0%A7%88%E0%A6%B2%E0%A7%80_%E0%A6%A4%E0%A7%8D%E0%A6%B0%E0%A7%81%E0%A6%9F%E0%A6%BF" title="সাহায্য:উদ্ধৃতি শৈলী ত্রুটি - Bengaleg" lang="bn" hreflang="bn" data-title="সাহায্য:উদ্ধৃতি শৈলী ত্রুটি" data-language-autonym="বাংলা" data-language-local-name="Bengaleg" class="interlanguage-link-target">বাংলা</a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Hj%C3%A6lp:CS1-fejl" title="Hjælp:CS1-fejl - Daneg" lang="da" hreflang="da" data-title="Hjælp:CS1-fejl" data-language-autonym="Dansk" data-language-local-name="Daneg" class="interlanguage-link-target">Dansk</a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%92%CE%BF%CE%AE%CE%B8%CE%B5%CE%B9%CE%B1:%CE%A3%CF%86%CE%AC%CE%BB%CE%BC%CE%B1%CF%84%CE%B1_%CF%80%CE%B1%CF%81%CE%B1%CF%80%CE%BF%CE%BC%CF%80%CF%8E%CE%BD_CS1" title="Βοήθεια:Σφάλματα παραπομπών CS1 - Groeg" lang="el" hreflang="el" data-title="Βοήθεια:Σφάλματα παραπομπών CS1" data-language-autonym="Ελληνικά" data-language-local-name="Groeg" class="interlanguage-link-target">Ελληνικά</a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Help:CS1_errors" title="Help:CS1 errors - Saesneg" lang="en" hreflang="en" data-title="Help:CS1 errors" data-language-autonym="English" data-language-local-name="Saesneg" class="interlanguage-link-target">English</a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Ayuda:Errores_en_las_referencias" title="Ayuda:Errores en las referencias - Sbaeneg" lang="es" hreflang="es" data-title="Ayuda:Errores en las referencias" data-language-autonym="Español" data-language-local-name="Sbaeneg" class="interlanguage-link-target">Español</a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Juhend:Viitamismallide_vead" title="Juhend:Viitamismallide vead - Estoneg" lang="et" hreflang="et" data-title="Juhend:Viitamismallide vead" data-language-autonym="Eesti" data-language-local-name="Estoneg" class="interlanguage-link-target">Eesti</a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%B1%D8%A7%D9%87%D9%86%D9%85%D8%A7:%D8%AE%D8%B7%D8%A7%D9%87%D8%A7%DB%8C_%D8%A7%D9%84%DA%AF%D9%88%DB%8C_%DB%8C%D8%A7%D8%AF%DA%A9%D8%B1%D8%AF" title="راهنما:خطاهای الگوی یادکرد - Perseg" lang="fa" hreflang="fa" data-title="راهنما:خطاهای الگوی یادکرد" data-language-autonym="فارسی" data-language-local-name="Perseg" class="interlanguage-link-target">فارسی</a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Axuda:Erros_nas_referencias" title="Axuda:Erros nas referencias - Galisieg" lang="gl" hreflang="gl" data-title="Axuda:Erros nas referencias" data-language-autonym="Galego" data-language-local-name="Galisieg" class="interlanguage-link-target">Galego</a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%A2%D7%96%D7%A8%D7%94:%D7%A9%D7%92%D7%99%D7%90%D7%95%D7%AA_%D7%A6%D7%99%D7%98%D7%95%D7%98" title="עזרה:שגיאות ציטוט - Hebraeg" lang="he" hreflang="he" data-title="עזרה:שגיאות ציטוט" data-language-autonym="עברית" data-language-local-name="Hebraeg" class="interlanguage-link-target">עברית</a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%B8%E0%A4%B9%E0%A4%BE%E0%A4%AF%E0%A4%A4%E0%A4%BE:%E0%A4%B8%E0%A5%80%E0%A4%8F%E0%A4%B81_%E0%A4%A4%E0%A5%8D%E0%A4%B0%E0%A5%81%E0%A4%9F%E0%A4%BF%E0%A4%AF%E0%A4%BE%E0%A4%81" title="सहायता:सीएस1 त्रुटियाँ - Hindi" lang="hi" hreflang="hi" data-title="सहायता:सीएस1 त्रुटियाँ" data-language-autonym="हिन्दी" data-language-local-name="Hindi" class="interlanguage-link-target">हिन्दी</a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%95%D5%A3%D5%B6%D5%B8%D6%82%D5%A9%D5%B5%D5%B8%D6%82%D5%B6:CS1_%D5%BD%D5%AD%D5%A1%D5%AC%D5%B6%D5%A5%D6%80" title="Օգնություն:CS1 սխալներ - Armeneg" lang="hy" hreflang="hy" data-title="Օգնություն:CS1 սխալներ" data-language-autonym="Հայերեն" data-language-local-name="Armeneg" class="interlanguage-link-target">Հայերեն</a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Bantuan:Galat_CS1" title="Bantuan:Galat CS1 - Indoneseg" lang="id" hreflang="id" data-title="Bantuan:Galat CS1" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indoneseg" class="interlanguage-link-target">Bahasa Indonesia</a></li><li class="interlanguage-link interwiki-ilo mw-list-item"><a href="https://ilo.wikipedia.org/wiki/Tulong:Dagiti_biddut_ti_CS1" title="Tulong:Dagiti biddut ti CS1 - Ilocaneg" lang="ilo" hreflang="ilo" data-title="Tulong:Dagiti biddut ti CS1" data-language-autonym="Ilokano" data-language-local-name="Ilocaneg" class="interlanguage-link-target">Ilokano</a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/Help:CS1%E3%83%86%E3%83%B3%E3%83%97%E3%83%AC%E3%83%BC%E3%83%88%E3%82%A8%E3%83%A9%E3%83%BC" title="Help:CS1テンプレートエラー - Japaneeg" lang="ja" hreflang="ja" data-title="Help:CS1テンプレートエラー" data-language-autonym="日本語" data-language-local-name="Japaneeg" class="interlanguage-link-target">日本語</a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%9C%84%ED%82%A4%EB%B0%B1%EA%B3%BC:%EC%9D%B8%EC%9A%A9_%EC%98%A4%EB%A5%98_%EB%8F%84%EC%9B%80%EB%A7%90" title="위키백과:인용 오류 도움말 - Coreeg" lang="ko" hreflang="ko" data-title="위키백과:인용 오류 도움말" data-language-autonym="한국어" data-language-local-name="Coreeg" class="interlanguage-link-target">한국어</a></li><li class="interlanguage-link interwiki-ku mw-list-item"><a href="https://ku.wikipedia.org/wiki/Al%C3%AEkar%C3%AE:Xeletiy%C3%AAn_%C3%A7avkaniy%C3%AA" title="Alîkarî:Xeletiyên çavkaniyê - Cwrdeg" lang="ku" hreflang="ku" data-title="Alîkarî:Xeletiyên çavkaniyê" data-language-autonym="Kurdî" data-language-local-name="Cwrdeg" class="interlanguage-link-target">Kurdî</a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%B8%E0%B4%B9%E0%B4%BE%E0%B4%AF%E0%B4%82:CS1_%E0%B4%AA%E0%B4%BF%E0%B4%B4%E0%B4%B5%E0%B5%81%E0%B4%95%E0%B5%BE" title="സഹായം:CS1 പിഴവുകൾ - Malayalam" lang="ml" hreflang="ml" data-title="സഹായം:CS1 പിഴവുകൾ" data-language-autonym="മലയാളം" data-language-local-name="Malayalam" class="interlanguage-link-target">മലയാളം</a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Hjelp:CS1-feil" title="Hjelp:CS1-feil - Norwyeg Nynorsk" lang="nn" hreflang="nn" data-title="Hjelp:CS1-feil" data-language-autonym="Norsk nynorsk" data-language-local-name="Norwyeg Nynorsk" class="interlanguage-link-target">Norsk nynorsk</a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Hjelp:CS1-feil" title="Hjelp:CS1-feil - Norwyeg Bokmål" lang="nb" hreflang="nb" data-title="Hjelp:CS1-feil" data-language-autonym="Norsk bokmål" data-language-local-name="Norwyeg Bokmål" class="interlanguage-link-target">Norsk bokmål</a></li><li class="interlanguage-link interwiki-or mw-list-item"><a href="https://or.wikipedia.org/wiki/%E0%AC%B8%E0%AC%B9%E0%AC%AF%E0%AD%8B%E0%AC%97:CS1_errors" title="ସହଯୋଗ:CS1 errors - Odia" lang="or" hreflang="or" data-title="ସହଯୋଗ:CS1 errors" data-language-autonym="ଓଡ଼ିଆ" data-language-local-name="Odia" class="interlanguage-link-target">ଓଡ଼ିଆ</a></li><li class="interlanguage-link interwiki-ps mw-list-item"><a href="https://ps.wikipedia.org/wiki/%D9%84%D8%A7%D8%B1%DA%9A%D9%88%D8%AF:CS1_errors" title="لارښود:CS1 errors - Pashto" lang="ps" hreflang="ps" data-title="لارښود:CS1 errors" data-language-autonym="پښتو" data-language-local-name="Pashto" class="interlanguage-link-target">پښتو</a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Ajuda:Erros_nas_refer%C3%AAncias" title="Ajuda:Erros nas referências - Portiwgaleg" lang="pt" hreflang="pt" data-title="Ajuda:Erros nas referências" data-language-autonym="Português" data-language-local-name="Portiwgaleg" class="interlanguage-link-target">Português</a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Ajutor:Erori_CS1" title="Ajutor:Erori CS1 - Rwmaneg" lang="ro" hreflang="ro" data-title="Ajutor:Erori CS1" data-language-autonym="Română" data-language-local-name="Rwmaneg" class="interlanguage-link-target">Română</a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%92%D0%B8%D0%BA%D0%B8%D0%BF%D0%B5%D0%B4%D0%B8%D1%8F:%D0%9E%D1%88%D0%B8%D0%B1%D0%BA%D0%B8_%D1%88%D0%B0%D0%B1%D0%BB%D0%BE%D0%BD%D0%BE%D0%B2_CS1/2" title="Википедия:Ошибки шаблонов CS1/2 - Rwseg" lang="ru" hreflang="ru" data-title="Википедия:Ошибки шаблонов CS1/2" data-language-autonym="Русский" data-language-local-name="Rwseg" class="interlanguage-link-target">Русский</a></li><li class="interlanguage-link interwiki-sco mw-list-item"><a href="https://sco.wikipedia.org/wiki/Help:CS1_errors" title="Help:CS1 errors - Sgoteg" lang="sco" hreflang="sco" data-title="Help:CS1 errors" data-language-autonym="Scots" data-language-local-name="Sgoteg" class="interlanguage-link-target">Scots</a></li><li class="interlanguage-link interwiki-sd mw-list-item"><a href="https://sd.wikipedia.org/wiki/%D9%85%D8%AF%D8%AF:%D8%B3%D9%8A_%D8%A7%D9%8A%D8%B31_%D8%BA%D9%84%D8%B7%D9%8A%D9%88%D9%86" title="مدد:سي ايس1 غلطيون - Sindhi" lang="sd" hreflang="sd" data-title="مدد:سي ايس1 غلطيون" data-language-autonym="سنڌي" data-language-local-name="Sindhi" class="interlanguage-link-target">سنڌي</a></li><li class="interlanguage-link interwiki-shn mw-list-item"><a href="https://shn.wikipedia.org/wiki/%E1%80%9C%E1%80%BD%E1%80%84%E1%80%BA%E1%82%88%E1%81%B8%E1%80%BD%E1%82%86%E1%82%88%E1%80%91%E1%82%85%E1%80%99%E1%80%BA:CS1_errors" title="လွင်ႈၸွႆႈထႅမ်:CS1 errors - Shan" lang="shn" hreflang="shn" data-title="လွင်ႈၸွႆႈထႅမ်:CS1 errors" data-language-autonym="ၽႃႇသႃႇတႆး " data-language-local-name="Shan" class="interlanguage-link-target">ၽႃႇသႃႇတႆး </a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wikipedia.org/wiki/%E0%B6%8B%E0%B6%AF%E0%B7%80%E0%B7%94:CS1_errors" title="උදවු:CS1 errors - Sinhaleg" lang="si" hreflang="si" data-title="උදවු:CS1 errors" data-language-autonym="සිංහල" data-language-local-name="Sinhaleg" class="interlanguage-link-target">සිංහල</a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Help:CS1_errors" title="Help:CS1 errors - Simple English" lang="en-simple" hreflang="en-simple" data-title="Help:CS1 errors" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target">Simple English</a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Pomo%C4%8D:Napake_CS1" title="Pomoč:Napake CS1 - Slofeneg" lang="sl" hreflang="sl" data-title="Pomoč:Napake CS1" data-language-autonym="Slovenščina" data-language-local-name="Slofeneg" class="interlanguage-link-target">Slovenščina</a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Ndihm%C3%AB:Gabimet_CS1" title="Ndihmë:Gabimet CS1 - Albaneg" lang="sq" hreflang="sq" data-title="Ndihmë:Gabimet CS1" data-language-autonym="Shqip" data-language-local-name="Albaneg" class="interlanguage-link-target">Shqip</a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%9F%D0%BE%D0%BC%D0%BE%D1%9B:CS1_%D0%B3%D1%80%D0%B5%D1%88%D0%BA%D0%B5" title="Помоћ:CS1 грешке - Serbeg" lang="sr" hreflang="sr" data-title="Помоћ:CS1 грешке" data-language-autonym="Српски / srpski" data-language-local-name="Serbeg" class="interlanguage-link-target">Српски / srpski</a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%89%E0%AE%A4%E0%AE%B5%E0%AE%BF:CS1_errors" title="உதவி:CS1 errors - Tamileg" lang="ta" hreflang="ta" data-title="உதவி:CS1 errors" data-language-autonym="தமிழ்" data-language-local-name="Tamileg" class="interlanguage-link-target">தமிழ்</a></li><li class="interlanguage-link interwiki-te mw-list-item"><a href="https://te.wikipedia.org/wiki/%E0%B0%B8%E0%B0%B9%E0%B0%BE%E0%B0%AF%E0%B0%82:CS1_errors" title="సహాయం:CS1 errors - Telugu" lang="te" hreflang="te" data-title="సహాయం:CS1 errors" data-language-autonym="తెలుగు" data-language-local-name="Telugu" class="interlanguage-link-target">తెలుగు</a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Yard%C4%B1m:KB1_hatalar%C4%B1" title="Yardım:KB1 hataları - Tyrceg" lang="tr" hreflang="tr" data-title="Yardım:KB1 hataları" data-language-autonym="Türkçe" data-language-local-name="Tyrceg" class="interlanguage-link-target">Türkçe</a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%94%D0%BE%D0%B2%D1%96%D0%B4%D0%BA%D0%B0:%D0%9F%D0%BE%D0%BC%D0%B8%D0%BB%D0%BA%D0%B8_CS1" title="Довідка:Помилки CS1 - Wcreineg" lang="uk" hreflang="uk" data-title="Довідка:Помилки CS1" data-language-autonym="Українська" data-language-local-name="Wcreineg" class="interlanguage-link-target">Українська</a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Yordam:MU1_xatolari" title="Yordam:MU1 xatolari - Wsbeceg" lang="uz" hreflang="uz" data-title="Yordam:MU1 xatolari" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="Wsbeceg" class="interlanguage-link-target">Oʻzbekcha / ўзбекча</a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Tr%E1%BB%A3_gi%C3%BAp:L%E1%BB%97i_CS1" title="Trợ giúp:Lỗi CS1 - Fietnameg" lang="vi" hreflang="vi" data-title="Trợ giúp:Lỗi CS1" data-language-autonym="Tiếng Việt" data-language-local-name="Fietnameg" class="interlanguage-link-target">Tiếng Việt</a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/Help:%E5%BC%95%E6%96%87%E6%A0%BC%E5%BC%8F1%E9%94%99%E8%AF%AF" title="Help:引文格式1错误 - Tsieinëeg" lang="zh" hreflang="zh" data-title="Help:引文格式1错误" data-language-autonym="中文" data-language-local-name="Tsieinëeg" class="interlanguage-link-target">中文</a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/Help:CS1_errors" title="Help:CS1 errors - Cantoneeg" lang="yue" hreflang="yue" data-title="Help:CS1 errors" data-language-autonym="粵語" data-language-local-name="Cantoneeg" class="interlanguage-link-target">粵語</a></li> </ul> <div class="after-portlet after-portlet-lang"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q12015580#sitelinks-wikipedia" title="Golygu dolenni rhyngwici" class="wbc-editpage">Golygu dolenni</a></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Parthau"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-help" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Cymorth:CS1_errors" title="Gweld y dudalen gymorth [c]" accesskey="c">Tudalen gymorth</a></li><li id="ca-talk" class="new vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Sgwrs_Cymorth:CS1_errors&action=edit&redlink=1" rel="discussion" class="new" title="Sgwrsio am y dudalen (dim tudalen ar gael) [t]" accesskey="t">Sgwrs</a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Newid amrywiad iaith" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" >Cymraeg </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Golygon"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Cymorth:CS1_errors">Darllen</a></li><li id="ca-ve-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit" title="Golygu'r dudalen hon [v]" accesskey="v">Golygu</a></li><li id="ca-edit" class="collapsible vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Cymorth:CS1_errors&action=edit" title="Golygu cod ffynhonnell y dudalen hon [e]" accesskey="e">Golygu cod</a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Cymorth:CS1_errors&action=history" title="Fersiynau cynt o'r dudalen hon. 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data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Blwch offer</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">symud i'r bar ochr</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">cuddio</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="Rhagor o opsiynau" > <div class="vector-menu-heading"> Gweithredoedd </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/Cymorth:CS1_errors">Darllen</a></li><li id="ca-more-ve-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit" title="Golygu'r dudalen hon [v]" accesskey="v">Golygu</a></li><li id="ca-more-edit" class="collapsible vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Cymorth:CS1_errors&action=edit" title="Golygu cod ffynhonnell y dudalen hon [e]" accesskey="e">Golygu cod</a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Cymorth:CS1_errors&action=history">Gweld hanes</a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> Cyffredinol </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Arbennig:WhatLinksHere/Cymorth:CS1_errors" title="Rhestr o bob tudalen sy'n cysylltu â hon [j]" accesskey="j">Beth sy'n cysylltu yma</a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Arbennig:RecentChangesLinked/Cymorth:CS1_errors" rel="nofollow" title="Newidiadau diweddar i dudalennau sydd yn cysylltu â hon [k]" accesskey="k">Newidiadau perthnasol</a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Arbennig:SpecialPages" title="Rhestr o'r holl dudalennau arbennig [q]" accesskey="q">Tudalennau arbennig</a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Cymorth:CS1_errors&oldid=10958862" title="Dolen barhaol i'r fersiwn hwn y dudalen hon">Dolen barhaol</a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Cymorth:CS1_errors&action=info" title="Mwy o wybodaeth am y dudalen hon">Gwybodaeth am y dudalen</a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Arbennig:UrlQ%C4%B1sald%C4%B1c%C4%B1s%C4%B1&url=https%3A%2F%2Fcy.wikipedia.org%2Fwiki%2FCymorth%3ACS1_errors">Cael URL byr</a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Arbennig:QrKodu&url=https%3A%2F%2Fcy.wikipedia.org%2Fwiki%2FCymorth%3ACS1_errors">Lawrlwytho cod QR</a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Argraffu / allforio </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-create_a_book" class="mw-list-item"><a href="/w/index.php?title=Arbennig:Book&bookcmd=book_creator&referer=Cymorth%3ACS1+errors">Llunio llyfr</a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Arbennig:DownloadAsPdf&page=Cymorth%3ACS1_errors&action=show-download-screen">Lawrlwytho fel PDF</a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Cymorth:CS1_errors&printable=yes" title="Cynhyrchwch fersiwn o'r dudalen yn barod at ei hargraffu [p]" accesskey="p">Fersiwn argraffu</a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> Mewn prosiectau eraill </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-meta mw-list-item"><a href="https://meta.wikimedia.org/wiki/Help:CS1_errors" hreflang="en">Meta-Wici</a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q12015580" title="Cysylltu i eitem ystorfa gysylltiedig [g]" accesskey="g">Eitem Wicidata</a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Offer tudalen"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Gwedd"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Gwedd</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">symud i'r bar ochr</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">cuddio</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Oddi ar Wicipedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="cy" dir="ltr"><a href="/w/index.php?title=Nodyn:Pp-meta&action=edit&redlink=1" class="new" title="Nodyn:Pp-meta (dim tudalen ar gael)">Nodyn:Pp-meta</a><style data-mw-deduplicate="TemplateStyles:r12942842">.mw-parser-output .ombox{margin:4px 0;border-collapse:collapse;border:1px solid #a2a9b1;background-color:var(--background-color-neutral-subtle,#f8f9fa);box-sizing:border-box;color:var(--color-base,#202122)}.mw-parser-output .ombox.mbox-small{font-size:88%;line-height:1.25em}.mw-parser-output .ombox-speedy{border:2px solid #b32424;background-color:#fee7e6}.mw-parser-output .ombox-delete{border:2px solid #b32424}.mw-parser-output .ombox-content{border:1px solid #f28500}.mw-parser-output .ombox-style{border:1px solid #fc3}.mw-parser-output .ombox-move{border:1px solid #9932cc}.mw-parser-output .ombox-protection{border:2px solid #a2a9b1}.mw-parser-output .ombox .mbox-text{border:none;padding:0.25em 0.9em;width:100%}.mw-parser-output .ombox .mbox-image{border:none;padding:2px 0 2px 0.9em;text-align:center}.mw-parser-output .ombox .mbox-imageright{border:none;padding:2px 0.9em 2px 0;text-align:center}.mw-parser-output .ombox .mbox-empty-cell{border:none;padding:0;width:1px}.mw-parser-output .ombox .mbox-invalid-type{text-align:center}@media(min-width:720px){.mw-parser-output .ombox{margin:4px 10%}.mw-parser-output .ombox.mbox-small{clear:right;float:right;margin:4px 0 4px 1em;width:238px}}body.skin--responsive .mw-parser-output table.ombox img{max-width:none!important}@media screen{html.skin-theme-clientpref-night .mw-parser-output .ombox-speedy{background-color:#310402}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .ombox-speedy{background-color:#310402}}</style><table class="plainlinks ombox ombox-notice" role="presentation"><tbody><tr><td class="mbox-image"><a href="/wiki/Delwedd:Crystal128-configure.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/61/Crystal128-configure.svg/40px-Crystal128-configure.svg.png" decoding="async" width="40" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/61/Crystal128-configure.svg/60px-Crystal128-configure.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/61/Crystal128-configure.svg/79px-Crystal128-configure.svg.png 2x" data-file-width="125" data-file-height="126"/></a></td><td class="mbox-text">Mae'r dudalen hon yn ganllaw ar sut mae gwneud rhywbeth sy'n manylu arfer neu broses y Wicipedia Cymraeg.</td></tr></tbody></table> <table class="wikitable" style="float:right;" width="200px;"> <caption>CS1 citations that report these errors </caption> <tbody><tr> <td>{{<a href="/wiki/Nodyn:Citation" title="Nodyn:Citation">citation</a>}}</td> <td><a href="/w/index.php?title=Nodyn:Ya&action=edit&redlink=1" class="new" title="Nodyn:Ya (dim tudalen ar gael)">Nodyn:Ya</a> </td></tr> <tr> <td>{{<a href="/wiki/Nodyn:Cite_AV_media" title="Nodyn:Cite AV media">cite AV media</a>}}</td> <td><a href="/w/index.php?title=Nodyn:Ya&action=edit&redlink=1" class="new" title="Nodyn:Ya (dim tudalen ar gael)">Nodyn:Ya</a> </td></tr> <tr> <td>{{<a href="/w/index.php?title=Nodyn:Cite_AV_media_notes&action=edit&redlink=1" class="new" title="Nodyn:Cite AV media notes (dim tudalen ar gael)">cite AV media notes</a>}}</td> <td><a href="/w/index.php?title=Nodyn:Ya&action=edit&redlink=1" class="new" title="Nodyn:Ya (dim tudalen ar gael)">Nodyn:Ya</a> </td></tr> <tr> <td>{{<a href="/wiki/Nodyn:Cite_book" title="Nodyn:Cite book">cite book</a>}}</td> <td><a href="/w/index.php?title=Nodyn:Ya&action=edit&redlink=1" class="new" title="Nodyn:Ya (dim tudalen ar gael)">Nodyn:Ya</a> </td></tr> <tr> <td>{{<a href="/wiki/Nodyn:Cite_conference" title="Nodyn:Cite conference">cite conference</a>}}</td> <td><a href="/w/index.php?title=Nodyn:Ya&action=edit&redlink=1" class="new" title="Nodyn:Ya (dim tudalen ar gael)">Nodyn:Ya</a> </td></tr> <tr> <td>{{<a href="/w/index.php?title=Nodyn:Cite_DVD_notes&action=edit&redlink=1" class="new" title="Nodyn:Cite DVD notes (dim tudalen ar gael)">cite DVD notes</a>}}</td> <td><a href="/w/index.php?title=Nodyn:Ya&action=edit&redlink=1" class="new" title="Nodyn:Ya (dim tudalen ar gael)">Nodyn:Ya</a> </td></tr> <tr> <td>{{<a href="/wiki/Nodyn:Cite_encyclopedia" title="Nodyn:Cite encyclopedia">cite encyclopedia</a>}}</td> <td><a href="/w/index.php?title=Nodyn:Ya&action=edit&redlink=1" class="new" title="Nodyn:Ya (dim tudalen ar gael)">Nodyn:Ya</a> </td></tr> <tr> <td>{{<a href="/wiki/Nodyn:Cite_episode" title="Nodyn:Cite episode">cite episode</a>}}</td> <td> </td></tr> <tr> <td>{{<a href="/wiki/Nodyn:Cite_interview" title="Nodyn:Cite interview">cite interview</a>}}</td> <td><a href="/w/index.php?title=Nodyn:Ya&action=edit&redlink=1" class="new" title="Nodyn:Ya (dim tudalen ar gael)">Nodyn:Ya</a> </td></tr> <tr> <td>{{<a href="/wiki/Nodyn:Cite_journal" title="Nodyn:Cite journal">cite journal</a>}}</td> <td><a href="/w/index.php?title=Nodyn:Ya&action=edit&redlink=1" class="new" title="Nodyn:Ya (dim tudalen ar gael)">Nodyn:Ya</a> </td></tr> <tr> <td>{{<a href="/w/index.php?title=Nodyn:Cite_mailing_list&action=edit&redlink=1" class="new" title="Nodyn:Cite mailing list (dim tudalen ar gael)">cite mailing list</a>}}</td> <td><a href="/w/index.php?title=Nodyn:Ya&action=edit&redlink=1" class="new" title="Nodyn:Ya (dim tudalen ar gael)">Nodyn:Ya</a> </td></tr> <tr> <td>{{<a href="/wiki/Nodyn:Cite_map" title="Nodyn:Cite map">cite map</a>}}</td> <td> </td></tr> <tr> <td>{{<a href="/wiki/Nodyn:Cite_news" title="Nodyn:Cite news">cite news</a>}}</td> <td><a href="/w/index.php?title=Nodyn:Ya&action=edit&redlink=1" class="new" title="Nodyn:Ya (dim tudalen ar gael)">Nodyn:Ya</a> </td></tr> <tr> <td>{{<a href="/w/index.php?title=Nodyn:Cite_newsgroup&action=edit&redlink=1" class="new" title="Nodyn:Cite newsgroup (dim tudalen ar gael)">cite newsgroup</a>}}</td> <td><a href="/w/index.php?title=Nodyn:Ya&action=edit&redlink=1" class="new" title="Nodyn:Ya (dim tudalen ar gael)">Nodyn:Ya</a> </td></tr> <tr> <td>{{<a href="/wiki/Nodyn:Cite_podcast" title="Nodyn:Cite podcast">cite podcast</a>}}</td> <td><a href="/w/index.php?title=Nodyn:Ya&action=edit&redlink=1" class="new" title="Nodyn:Ya (dim tudalen ar gael)">Nodyn:Ya</a> </td></tr> <tr> <td>{{<a href="/wiki/Nodyn:Cite_press_release" title="Nodyn:Cite press release">cite press release</a>}}</td> <td><a href="/w/index.php?title=Nodyn:Ya&action=edit&redlink=1" class="new" title="Nodyn:Ya (dim tudalen ar gael)">Nodyn:Ya</a> </td></tr> <tr> <td>{{<a href="/wiki/Nodyn:Cite_report" title="Nodyn:Cite report">cite report</a>}}</td> <td><a href="/w/index.php?title=Nodyn:Ya&action=edit&redlink=1" class="new" title="Nodyn:Ya (dim tudalen ar gael)">Nodyn:Ya</a> </td></tr> <tr> <td>{{<a href="/w/index.php?title=Nodyn:Cite_serial&action=edit&redlink=1" class="new" title="Nodyn:Cite serial (dim tudalen ar gael)">cite serial</a>}}</td> <td> </td></tr> <tr> <td>{{<a href="/w/index.php?title=Nodyn:Cite_sign&action=edit&redlink=1" class="new" title="Nodyn:Cite sign (dim tudalen ar gael)">cite sign</a>}}</td> <td><a href="/w/index.php?title=Nodyn:Ya&action=edit&redlink=1" class="new" title="Nodyn:Ya (dim tudalen ar gael)">Nodyn:Ya</a> </td></tr> <tr> <td>{{<a href="/wiki/Nodyn:Cite_speech" title="Nodyn:Cite speech">cite speech</a>}}</td> <td><a href="/w/index.php?title=Nodyn:Ya&action=edit&redlink=1" class="new" title="Nodyn:Ya (dim tudalen ar gael)">Nodyn:Ya</a> </td></tr> <tr> <td>{{<a href="/w/index.php?title=Nodyn:Cite_techreport&action=edit&redlink=1" class="new" title="Nodyn:Cite techreport (dim tudalen ar gael)">cite techreport</a>}}</td> <td><a href="/w/index.php?title=Nodyn:Ya&action=edit&redlink=1" class="new" title="Nodyn:Ya (dim tudalen ar gael)">Nodyn:Ya</a> </td></tr> <tr> <td>{{<a href="/w/index.php?title=Nodyn:Cite_thesis&action=edit&redlink=1" class="new" title="Nodyn:Cite thesis (dim tudalen ar gael)">cite thesis</a>}}</td> <td><a href="/w/index.php?title=Nodyn:Ya&action=edit&redlink=1" class="new" title="Nodyn:Ya (dim tudalen ar gael)">Nodyn:Ya</a> </td></tr> <tr> <td>{{<a href="/wiki/Nodyn:Cite_web" title="Nodyn:Cite web">cite web</a>}}</td> <td><a href="/w/index.php?title=Nodyn:Ya&action=edit&redlink=1" class="new" title="Nodyn:Ya (dim tudalen ar gael)">Nodyn:Ya</a> </td></tr> </tbody></table> This page describes the error messages reported by the <a href="/w/index.php?title=Cymorth:Citation_Style_1&action=edit&redlink=1" class="new" title="Cymorth:Citation Style 1 (dim tudalen ar gael)">Citation Style 1</a> citations highlighted in the table on the right side of this page, what they mean, and how editors might resolve the errors. Prior to 2013, the CS1 templates used the meta-template <code>{{<a href="/wiki/Nodyn:Citation/core" title="Nodyn:Citation/core">Citation/core</a>}}</code>. In 2013, as part of the <a href="/w/index.php?title=Wicipedia:LUA&action=edit&redlink=1" class="new" title="Wicipedia:LUA (dim tudalen ar gael)">WP:LUA</a> project, Wikipedia editors upgraded the CS1 series of templates using a single <a href="/w/index.php?title=Lua_(programming_language)&action=edit&redlink=1" class="new" title="Lua (programming language) (dim tudalen ar gael)">Lua</a> module. <a href="/wiki/Modiwl:Citation/CS1" title="Modiwl:Citation/CS1">Module:Citation/CS1</a> is the engine that controls how CS1 citations are displayed and how citation data are passed to external referencing tools through <a href="/w/index.php?title=COinS&action=edit&redlink=1" class="new" title="COinS (dim tudalen ar gael)">COinS</a> metadata. The benefits of the upgrade are enhanced performance, reduced complexity and redundancy, and for the purposes of this page, improved error detection, categorization, and reporting. <meta property="mw:PageProp/toc"/> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Controlling_error_message_display" data-mw-thread-id="h-Controlling_error_message_display">Controlling error message display</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=1" title="Golygu'r adran: Controlling error message display" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=1" title="Edit section's source code: Controlling error message display">golygu cod</a>]</div> While most of the <a href="/w/index.php?title=Cymorth:Citation_Style_1&action=edit&redlink=1" class="new" title="Cymorth:Citation Style 1 (dim tudalen ar gael)">Citation Style 1</a> error messages are visible to all readers, some remain hidden. Editors who wish to see all of the CS1 error messages can do so by updating their <a href="/wiki/Arbennig:MyPage/common.css" title="Arbennig:MyPage/common.css">common</a> or <a href="/wiki/Arbennig:MyPage/skin.css" title="Arbennig:MyPage/skin.css">skin</a> CSS stylesheet to include: <dl><dd><code class="mw-highlight mw-highlight-lang-css mw-content-ltr" style="" dir="ltr">.citation-comment {display: inline !important;} /* show all Citation Style 1 error messages */</code></dd></dl> Even with this css installed, older pages in Wikipedia's cache may not have been updated to show these error messages even though the page is listed in one of the tracking categories. A <a href="/w/index.php?title=Wicipedia:NULLEDIT&action=edit&redlink=1" class="new" title="Wicipedia:NULLEDIT (dim tudalen ar gael)">WP:NULLEDIT</a> will resolve that issue. Editors who do not wish to see any of the CS1 error messages can hide them all by updating their <a href="/wiki/Arbennig:MyPage/common.css" title="Arbennig:MyPage/common.css">common</a> or <a href="/wiki/Arbennig:MyPage/skin.css" title="Arbennig:MyPage/skin.css">skin</a> CSS stylesheet to include: <dl><dd><code class="mw-highlight mw-highlight-lang-css mw-content-ltr" style="" dir="ltr">.citation-comment {display: none;} /* hide all Citation Style 1 error messages */</code></dd></dl> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="|accessdate=_requires_|url=" data-mw-thread-id="h-|accessdate=_requires_|url=">|accessdate= requires |url=</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=2" title="Golygu'r adran: |accessdate= requires |url=" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=2" title="Edit section's source code: |accessdate= requires |url=">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a><code style="color:inherit; border:inherit; padding:inherit;">|accessdate=</code> requires <code style="color:inherit; border:inherit; padding:inherit;">|url=</code> (error message hidden by default) The <code>|access-date=</code> (or its alias, <code>|accessdate=</code>) is the date that the web resource addressed by <code>|url=</code> was added to the article. If <code>|access-date=</code> has been included in the citation without <code>|url=</code> then this message appears. If the citation does not use a web link, then <code>|access-date=</code> is redundant and should be removed. When the web resource has a publication or other fixed date associated with it, <code>|access-date=</code> is of limited value though may be useful in identifying an appropriate archived version of the resource. Without <code>|url=</code>, <code>|access-date=</code> is not considered useful. To resolve this error, provide a value for <code>|url=</code> or remove <code>|access-date=</code>. Editors should try to determine why the citation has <code>|access-date=</code> without <code>|url=</code>. For example, the citation may never have had a <code>|url=</code>, or <code>|url=</code> may have been removed because it links to a site that violates the creator's copyright (see <a href="/w/index.php?title=Wicipedia:COPYLINK&action=edit&redlink=1" class="new" title="Wicipedia:COPYLINK (dim tudalen ar gael)">WP:COPYLINK</a>), or because <code>|url=</code> was deemed to be dead and (mistakenly) removed. If the citation never had <code>|url=</code> or it was removed for copyright violations, remove <code>|access-date=</code>. When a dead <code>|url=</code> has been removed, restore the <code>|url=</code> and if possible repair it (see <a href="/w/index.php?title=Wicipedia:LINKROT&action=edit&redlink=1" class="new" title="Wicipedia:LINKROT (dim tudalen ar gael)">WP:LINKROT</a>). Pages with this error are automatically placed in <a href="/wiki/Categori:Pages_using_citations_with_accessdate_and_no_URL" title="Categori:Pages using citations with accessdate and no URL">Category:Pages using citations with accessdate and no URL</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="|archiveurl=_requires_|archivedate=" data-mw-thread-id="h-|archiveurl=_requires_|archivedate=">|archiveurl= requires |archivedate=</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=3" title="Golygu'r adran: |archiveurl= requires |archivedate=" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=3" title="Edit section's source code: |archiveurl= requires |archivedate=">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a><code style="color:inherit; border:inherit; padding:inherit;">|archiveurl=</code> requires <code style="color:inherit; border:inherit; padding:inherit;">|archivedate=</code> <code>|archive-date=</code> (or its alias, <code>|archivedate=</code>), identifies the date that the web resource was archived. To resolve this error, provide a value for <code>|archive-date=</code>. For web resources archived at archive.org,<a href="#cite_note-archive.org-2">[1]</a> the archival date can be found in the <code>|archive-url=</code>; for resources archived at webcitation.org,<a href="#cite_note-webcitation.org-3">[2]</a> the cache date is included in the archive header. Pages with this error are automatically placed in <a href="/wiki/Categori:Pages_with_archiveurl_citation_errors" title="Categori:Pages with archiveurl citation errors">Category:Pages with archiveurl citation errors</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="|archiveurl=_requires_|url=" data-mw-thread-id="h-|archiveurl=_requires_|url=">|archiveurl= requires |url=</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=4" title="Golygu'r adran: |archiveurl= requires |url=" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=4" title="Edit section's source code: |archiveurl= requires |url=">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a><code style="color:inherit; border:inherit; padding:inherit;">|archiveurl=</code> requires <code style="color:inherit; border:inherit; padding:inherit;">|url=</code> A properly formatted citation that includes <code>|archive-url=</code> and <code>|archive-date=</code> requires <code>|url=</code>. When the citation includes <code>|dead-url=no</code>, the ordering of elements in the rendered citation is changed to put the original url first. To resolve this error, provide a value for <code>|url=</code>. For web resources archived at archive.org,<a href="#cite_note-archive.org-2">[1]</a> the original url can be found in the <code>|archive-url=</code> value; for resources archived at webcitation.org,<a href="#cite_note-webcitation.org-3">[2]</a> the original url is included in the archive header. Pages with this error are automatically placed in <a href="/wiki/Categori:Pages_with_archiveurl_citation_errors" title="Categori:Pages with archiveurl citation errors">Category:Pages with archiveurl citation errors</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="|chapter=_ignored" data-mw-thread-id="h-|chapter=_ignored">|chapter= ignored</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=5" title="Golygu'r adran: |chapter= ignored" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=5" title="Edit section's source code: |chapter= ignored">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a><code style="color:inherit; border:inherit; padding:inherit;">|chapter=</code> ignored <a href="/w/index.php?title=Cymorth:Citation_Style_1&action=edit&redlink=1" class="new" title="Cymorth:Citation Style 1 (dim tudalen ar gael)">Citation Style 1</a> templates <code>{{<a href="/wiki/Nodyn:Cite_web" title="Nodyn:Cite web">cite web</a>}}</code>, <code>{{<a href="/wiki/Nodyn:Cite_news" title="Nodyn:Cite news">cite news</a>}}</code>, <code>{{<a href="/wiki/Nodyn:Cite_journal" title="Nodyn:Cite journal">cite journal</a>}}</code>, <code>{{<a href="/wiki/Nodyn:Cite_press_release" title="Nodyn:Cite press release">cite press release</a>}}</code>, <code>{{<a href="/wiki/Nodyn:Cite_podcast" title="Nodyn:Cite podcast">cite podcast</a>}}</code>, <code>{{<a href="/w/index.php?title=Nodyn:Cite_newsgroup&action=edit&redlink=1" class="new" title="Nodyn:Cite newsgroup (dim tudalen ar gael)">cite newsgroup</a>}}</code>, and template <code>{{<a href="/wiki/Nodyn:Citation" title="Nodyn:Citation">citation</a>}}</code> when <tt>{{citation}}</tt> uses <code>|work=</code> or any of its aliases, do not support <code>|chapter=</code> or the aliases <code>|contribution=</code>, <code>|entry=</code>, <code>|article=</code>, or <code>|section=</code>. To resolve this error, use a more appropriate citation template or place the content of the <code>|chapter=</code> parameter in <code>|title=</code>. Pages with this error are automatically placed in <a href="/wiki/Categori:CS1_errors:_chapter_ignored" title="Categori:CS1 errors: chapter ignored">Category:CS1 errors: chapter ignored</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Check_|arxiv=_value" data-mw-thread-id="h-Check_|arxiv=_value">Check |arxiv= value</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=6" title="Golygu'r adran: Check |arxiv= value" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=6" title="Edit section's source code: Check |arxiv= value">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a>Check <code style="color:inherit; border:inherit; padding:inherit;">|arxiv=</code> value When <a href="/w/index.php?title=Cymorth:Citation_Style_1&action=edit&redlink=1" class="new" title="Cymorth:Citation Style 1 (dim tudalen ar gael)">CS1 citations</a> contain <code>|arxiv=</code>, a test is done to see if the arXiv identifier conforms with the arXiv identifier scheme.<a href="#cite_note-4">[3]</a> The identifier is checked for a valid number of digits in the article id; valid year and month values; and properly-placed hyphens, slashes, and dots. To resolve this error, ensure that the <code>|arxiv=</code> value is correct. Pages with this error are automatically placed in <a href="/w/index.php?title=Categori:CS1_errors:_arXiv&action=edit&redlink=1" class="new" title="Categori:CS1 errors: arXiv (dim tudalen ar gael)">Category:CS1 errors: arXiv</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Check_|asin=_value" data-mw-thread-id="h-Check_|asin=_value">Check |asin= value</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=7" title="Golygu'r adran: Check |asin= value" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=7" title="Edit section's source code: Check |asin= value">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a>Check <code style="color:inherit; border:inherit; padding:inherit;">|asin=</code> value When <a href="/w/index.php?title=Cymorth:Citation_Style_1&action=edit&redlink=1" class="new" title="Cymorth:Citation Style 1 (dim tudalen ar gael)">CS1 citations</a> contain <code>|asin=</code>, a test is done to see if the <a href="/w/index.php?title=ASIN&action=edit&redlink=1" class="new" title="ASIN (dim tudalen ar gael)">ASIN</a> identifier is contains ten upper-case alphanumeric characters without punctuation or spaces and that if the first character is numeric, that the ASIN conforms to the rules for a ten-digit <a href="/wiki/ISBN" class="mw-redirect" title="ISBN">ISBN</a>. To resolve this error, ensure that the <code>|asin=</code> value is correct. If the <code>|asin=</code> value is correct and all-numeric, use <code>|isbn=</code> instead and delete any <code>|asin-tld=</code> parameters. Articles with CS1 citations that use <code>|asin=</code> with all numeric values are categorized in <a href="/w/index.php?title=Nodyn:Cl&action=edit&redlink=1" class="new" title="Nodyn:Cl (dim tudalen ar gael)">Nodyn:Cl</a>. Pages with this error are automatically placed in <a href="/w/index.php?title=Categori:CS1_errors:_ASIN&action=edit&redlink=1" class="new" title="Categori:CS1 errors: ASIN (dim tudalen ar gael)">Category:CS1 errors: ASIN</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Check_|authorlink=_value" data-mw-thread-id="h-Check_|authorlink=_value">Check |authorlink= value</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=8" title="Golygu'r adran: Check |authorlink= value" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=8" title="Edit section's source code: Check |authorlink= value">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a>Check <code style="color:inherit; border:inherit; padding:inherit;">|authorlink=</code> value The <code>|author-link=</code> (or any of its aliases, such as <code>|authorlink=</code>) links an associated <code>|author=</code> parameter value to the author's existing Wikipedia article. It should contain only the Wikipedia article name. <a href="/wiki/Modiwl:Citation/CS1" title="Modiwl:Citation/CS1">Module:Citation/CS1</a> checks <code>|author-link=</code> for a <a href="/w/index.php?title=URI_scheme&action=edit&redlink=1" class="new" title="URI scheme (dim tudalen ar gael)">URI scheme</a> (<code>http://</code>, <code>https://</code>, the protocol relative scheme <code>//</code>, etc.). To resolve this error, ensure that the <code>|author-link=</code> value is the full name of a Wikipedia article (without brackets), and not a link to an external site. Pages with this error are automatically placed in <a href="/w/index.php?title=Categori:CS1_errors:_authorlink&action=edit&redlink=1" class="new" title="Categori:CS1 errors: authorlink (dim tudalen ar gael)">Category:CS1 errors: authorlink</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Check_date_values_in:_|param1=,_|param2=,_..." data-mw-thread-id="h-Check_date_values_in:_|param1=,_|param2=,_...">Check date values in: |param1=, |param2=, ...</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=9" title="Golygu'r adran: Check date values in: |param1=, |param2=, ..." class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=9" title="Edit section's source code: Check date values in: |param1=, |param2=, ...">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a>Check date values in: <code style="color:inherit; border:inherit; padding:inherit;">|param1=, |param2=, ...</code> When <a href="/w/index.php?title=Cymorth:Citation_Style_1&action=edit&redlink=1" class="new" title="Cymorth:Citation Style 1 (dim tudalen ar gael)">CS1 citations</a> contain date-holding parameters, an automated test is done to see if the dates are real dates that comply with a <a href="/w/index.php?title=Cymorth:Citation_Style_1&action=edit&redlink=1" class="new" title="Cymorth:Citation Style 1 (dim tudalen ar gael)">subset</a> of <a href="/w/index.php?title=Wicipedia:Manual_of_Style/Dates_and_numbers&action=edit&redlink=1" class="new" title="Wicipedia:Manual of Style/Dates and numbers (dim tudalen ar gael)">WP:DATESNO</a>. To resolve this error, ensure that the date is an actual date and that the date format follows the Wikipedia style sheet in the named parameter. Some things to look for: <ul><li>misplaced, incorrect, or extraneous punctuation</li> <li>extraneous text</li> <li>incomplete year-initial dates</li> <li>hyphens instead of en dashes</li> <li>misspelling or improper capitalization</li> <li>date formats listed in <a href="/w/index.php?title=Wicipedia:BADDATEFORMAT&action=edit&redlink=1" class="new" title="Wicipedia:BADDATEFORMAT (dim tudalen ar gael)">WP:BADDATEFORMAT</a></li> <li>impossible dates (e.g., 29 February 2011)</li> <li>errors in <code>|date=</code> caused by errors in <code>|year=</code> or <code>|month=</code></li> <li>more than one date in a date-holding parameter</li></ul> <a href="/w/index.php?title=Wicipedia:DATERANGE&action=edit&redlink=1" class="new" title="Wicipedia:DATERANGE (dim tudalen ar gael)">WP:DATERANGE</a> describes how to separate dates in a date range. Do not use <code>&nbsp;</code>, <code>&ndash;</code>, or <code>{{<a href="/wiki/Nodyn:Spaced_ndash" title="Nodyn:Spaced ndash">spaced ndash</a>}}</code> as these corrupt the metadata. To add an en dash, use the <a href="/w/index.php?title=Cymorth:CharInsert&action=edit&redlink=1" class="new" title="Cymorth:CharInsert (dim tudalen ar gael)">CharInsert</a> edit tool or see <a href="/w/index.php?title=Wicipedia:How_to_make_dashes&action=edit&redlink=1" class="new" title="Wicipedia:How to make dashes (dim tudalen ar gael)">Wikipedia:How to make dashes</a>. A bot is often able to correct the separator, provided the overall format is unambiguous. Future dates in CS1 citations are limited to current year + 1; that is, for 2024, citation dates in 2025 are acceptable but citation dates in 2026 and beyond are not. Dates prior to 1582 are treated as <a href="/w/index.php?title=Julian_calendar&action=edit&redlink=1" class="new" title="Julian calendar (dim tudalen ar gael)">Julian calendar</a> dates. Dates from 1582 onward are treated as <a href="/w/index.php?title=Gregorian_calendar&action=edit&redlink=1" class="new" title="Gregorian calendar (dim tudalen ar gael)">Gregorian calendar</a> dates. The Julian calendar was used in some places until approximately 1923. Three Julian calendar dates in the overlap period, 29 February in the years 1700, 1800, and 1900, will cause this error message because those years are not leap years in the Gregorian calendar. Pages with this error are automatically placed in <a href="/wiki/Categori:CS1_errors:_dates" title="Categori:CS1 errors: dates">Category:CS1 errors: dates</a>.<a href="#cite_note-categories-1">[a]</a> <table class="wikitable"> <caption>Examples </caption> <tbody><tr> <th>Issue</th> <th>Incorrect</th> <th>Correct </th></tr> <tr> <td>Hyphen (use dash)</td> <td><cite class="citation book">Title. 2002–2003.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Title&rft.date=2002%2F2003&rfr_id=info%3Asid%2Fcy.wikipedia.org%3ACymorth%3ACS1+errors" class="Z3988">CS1 maint: date format (<a href="/wiki/Categori:CS1_maint:_date_format" title="Categori:CS1 maint: date format">link</a>)<style data-mw-deduplicate="TemplateStyles:r8312344">.mw-parser-output cite.citation{font-style:inherit}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/12px-Wikisource-logo.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-maint{display:none;color:#33aa33;margin-left:0.3em}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}</style></td> <td><cite class="citation book">Title. 2002–2003.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Title&rft.date=2002%2F2003&rfr_id=info%3Asid%2Fcy.wikipedia.org%3ACymorth%3ACS1+errors" class="Z3988"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"> </td></tr> <tr> <td>Slash (use dash)</td> <td><cite class="citation book">Title. 2002/2003.</cite> Check date values in: <code class="cs1-code">|date=</code> (<a class="mw-selflink-fragment" href="#bad_date">help</a>)<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"></td> <td><cite class="citation book">Title. 2002–2003.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Title&rft.date=2002%2F2003&rfr_id=info%3Asid%2Fcy.wikipedia.org%3ACymorth%3ACS1+errors" class="Z3988"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"> </td></tr> <tr> <td>Season or month capitalization</td> <td><cite class="citation book">Title. spring 2011.</cite> Check date values in: <code class="cs1-code">|date=</code> (<a class="mw-selflink-fragment" href="#bad_date">help</a>)<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"></td> <td><cite class="citation book">Title. Spring 2011.</cite><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"> </td></tr> <tr> <td>Future date (typo)</td> <td><cite class="citation book">Title. 2102.</cite> Check date values in: <code class="cs1-code">|date=</code> (<a class="mw-selflink-fragment" href="#bad_date">help</a>)<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"></td> <td><cite class="citation book">Title. 2012.</cite><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"> </td></tr> <tr> <td>Ambiguous date range or year and month</td> <td><cite class="citation book">Title. 2002-03.</cite> Check date values in: <code class="cs1-code">|date=</code> (<a class="mw-selflink-fragment" href="#bad_date">help</a>)<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"></td> <td><cite class="citation book">Title. 2002–2003.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Title&rft.date=2002%2F2003&rfr_id=info%3Asid%2Fcy.wikipedia.org%3ACymorth%3ACS1+errors" class="Z3988"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"> or <cite class="citation book">Title. March 2002.</cite><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"> </td></tr> <tr> <td>Bad abbreviation</td> <td><cite class="citation book">Title. Febr. 28, 1900.</cite> Check date values in: <code class="cs1-code">|date=</code> (<a class="mw-selflink-fragment" href="#bad_date">help</a>)<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"></td> <td><cite class="citation book">Title. Feb 28, 1900.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Title&rft.date=1900-02-28&rfr_id=info%3Asid%2Fcy.wikipedia.org%3ACymorth%3ACS1+errors" class="Z3988"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"> or <cite class="citation book">Title. February 28, 1900.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Title&rft.date=1900-02-28&rfr_id=info%3Asid%2Fcy.wikipedia.org%3ACymorth%3ACS1+errors" class="Z3988"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"> </td></tr> <tr> <td>Nonexistent date</td> <td><cite class="citation book">Title. February 29, 1900.</cite> Check date values in: <code class="cs1-code">|date=</code> (<a class="mw-selflink-fragment" href="#bad_date">help</a>)<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"></td> <td> </td></tr> <tr> <td>Comma in month and year</td> <td><cite class="citation book">Title. February, 1900.</cite> Check date values in: <code class="cs1-code">|date=</code> (<a class="mw-selflink-fragment" href="#bad_date">help</a>)<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"></td> <td><cite class="citation book">Title. February 1900.</cite><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"> </td></tr> <tr> <td>Non-date text</td> <td><cite class="citation book">Title. 2008, originally 2000.</cite> Check date values in: <code class="cs1-code">|date=</code> (<a class="mw-selflink-fragment" href="#bad_date">help</a>)<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"></td> <td><cite class="citation book">Title. 2008 [2000].</cite><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"> using <code>|orig-year=</code> </td></tr> <tr> <td>Zero-padding</td> <td><cite class="citation book">Title. January 04, 1987.</cite> Check date values in: <code class="cs1-code">|date=</code> (<a class="mw-selflink-fragment" href="#bad_date">help</a>)<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"></td> <td><cite class="citation book">Title. January 4, 1987.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Title&rft.date=1987-01-04&rfr_id=info%3Asid%2Fcy.wikipedia.org%3ACymorth%3ACS1+errors" class="Z3988"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"> </td></tr> <tr> <td>Date with slashes</td> <td><cite class="citation book">Title. 12/6/87.</cite> Check date values in: <code class="cs1-code">|date=</code> (<a class="mw-selflink-fragment" href="#bad_date">help</a>)<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"></td> <td><cite class="citation book">Title. December 6, 1987.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Title&rft.date=1987-12-06&rfr_id=info%3Asid%2Fcy.wikipedia.org%3ACymorth%3ACS1+errors" class="Z3988"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"> or <cite class="citation book">Title. 12 June 1987.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Title&rft.date=1987-06-12&rfr_id=info%3Asid%2Fcy.wikipedia.org%3ACymorth%3ACS1+errors" class="Z3988"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"> </td></tr> </tbody></table> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Check_|doi=_value" data-mw-thread-id="h-Check_|doi=_value">Check |doi= value</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=10" title="Golygu'r adran: Check |doi= value" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=10" title="Edit section's source code: Check |doi= value">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a>Check <code style="color:inherit; border:inherit; padding:inherit;">|doi=</code> value When <a href="/w/index.php?title=Cymorth:Citation_Style_1&action=edit&redlink=1" class="new" title="Cymorth:Citation Style 1 (dim tudalen ar gael)">CS1 citations</a> contain <code>|doi=</code>, a test is done to see if the prefix portion of the <a href="/wiki/Digital_object_identifier" class="mw-redirect" title="Digital object identifier">DOI</a> value contains the proper "<code>10.</code>" registry identifier. Additionally, the <code>|doi=</code> value is checked to make sure that it does not contain spaces or en dashes and does not end with punctuation. Further validation of the DOI is not performed. To resolve this error, ensure that the <code>|doi=</code> value is correct. Pages with this error are automatically placed in <a href="/wiki/Categori:CS1_errors:_DOI" title="Categori:CS1 errors: DOI">Category:CS1 errors: DOI</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Check_|isbn=_value" data-mw-thread-id="h-Check_|isbn=_value">Check |isbn= value</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=11" title="Golygu'r adran: Check |isbn= value" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=11" title="Edit section's source code: Check |isbn= value">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a>Check <code style="color:inherit; border:inherit; padding:inherit;">|isbn=</code> value <a href="/w/index.php?title=Cymorth:Citation_Style_1&action=edit&redlink=1" class="new" title="Cymorth:Citation Style 1 (dim tudalen ar gael)">Citation Style 1</a> templates that contain <code>|isbn=</code> are checked to ensure that the <a href="/wiki/ISBN" class="mw-redirect" title="ISBN">ISBN</a> is the proper length (ten or thirteen digits), that the ISBN uses the correct optional separators (simple space or hyphen), and that the final <a href="/w/index.php?title=Check_digit&action=edit&redlink=1" class="new" title="Check digit (dim tudalen ar gael)">check digit</a> is correct according to the ISBN specification. Only one ISBN is allowed in this field because the whole <code>|isbn=</code> value is included in the citation's <a href="/w/index.php?title=COinS&action=edit&redlink=1" class="new" title="COinS (dim tudalen ar gael)">COinS</a> <a href="/wiki/Metadata" title="Metadata">metadata</a>. See also <a href="/w/index.php?title=Wicipedia:COinS&action=edit&redlink=1" class="new" title="Wicipedia:COinS (dim tudalen ar gael)">Wikipedia:COinS</a>. More than one ISBN, or characters that are not part of the ISBN, corrupt the COinS metadata and may also corrupt the link to <a href="/wiki/Arbennig:BookSources" title="Arbennig:BookSources">Special:BookSources</a>. To resolve this error, ensure that the <code>|isbn=</code> value is correct, that only one ISBN is used, that the proper optional separators are used, and that no other text is included. Use the 13-digit ISBN when it is available. When a 10-digit ISBN is used, if the check digit is a lowercase 'x', change it to an uppercase 'X'. <ul><li>Do not try to resolve the error by simply recalculating the check digit. The check digit is there to check whether the main part of the number is correct. If the ISBN is failing to validate, it is likely that there is a typo in the main part of the number. In this case, recalculating the check digit results in an apparently valid ISBN that leads to the wrong source (or to nowhere).</li> <li>If you only have a 10-digit ISBN, do use the number as-is, do not try to convert it.</li> <li>If the ISBN as printed in your source is refusing to validate, do check both the front matter and the book cover for ISBNs. It is not uncommon for the ISBN to be misprinted in the front matter but correct on the cover.</li> <li>Do preview your edit and check that the new ISBN does now link to the correct source.</li></ul> In very rare cases, publishers have released books with malformed ISBNs. If you are certain that a non-conforming ISBN truly corresponds to the published work, then you can add <code>|ignore-isbn-error=true</code> to the citation in order to suppress the error message. In many cases, books may have been reissued with a corrected ISBN. Use a corrected ISBN when possible. See also <a href="/w/index.php?title=Wicipedia:ISBN&action=edit&redlink=1" class="new" title="Wicipedia:ISBN (dim tudalen ar gael)">Wikipedia:ISBN</a>. Pages with this error are automatically placed in <a href="/wiki/Categori:Pages_with_ISBN_errors" title="Categori:Pages with ISBN errors">Category:Pages with ISBN errors</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Check_|issn=_value" data-mw-thread-id="h-Check_|issn=_value">Check |issn= value</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=12" title="Golygu'r adran: Check |issn= value" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=12" title="Edit section's source code: Check |issn= value">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a>Check <code style="color:inherit; border:inherit; padding:inherit;">|issn=</code> value <a href="/w/index.php?title=Cymorth:Citation_Style_1&action=edit&redlink=1" class="new" title="Cymorth:Citation Style 1 (dim tudalen ar gael)">Citation Style 1</a> templates that contain <code>|issn=</code> are checked to ensure that the <a href="/wiki/ISSN" class="mw-redirect" title="ISSN">ISSN</a> is the proper length (eight digits) and that the final <a href="/w/index.php?title=Check_digit&action=edit&redlink=1" class="new" title="Check digit (dim tudalen ar gael)">check digit</a> validates according to the ISSN specification. Only one ISSN is allowed in this field because the whole <code>|issn=</code> value is included in the citation's <a href="/w/index.php?title=COinS&action=edit&redlink=1" class="new" title="COinS (dim tudalen ar gael)">COinS</a> <a href="/wiki/Metadata" title="Metadata">metadata</a>. See also <a href="/w/index.php?title=Wicipedia:COinS&action=edit&redlink=1" class="new" title="Wicipedia:COinS (dim tudalen ar gael)">Wikipedia:COinS</a>. The ISSN is always rendered as two four-digit numbers separated with a hyphen. To resolve this error, ensure that the <code>|issn=</code> value is correct, that only one ISSN is used, and that no other text is included (allowable characters are 0-9, X, and -). If the check-digit is a lowercase 'x', change it to an uppercase 'X'. Pages with this error are automatically placed in <a href="/w/index.php?title=Categori:CS1_errors:_ISSN&action=edit&redlink=1" class="new" title="Categori:CS1 errors: ISSN (dim tudalen ar gael)">Category:CS1 errors: ISSN</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Check_|lccn=_value" data-mw-thread-id="h-Check_|lccn=_value">Check |lccn= value</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=13" title="Golygu'r adran: Check |lccn= value" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=13" title="Edit section's source code: Check |lccn= value">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a>Check <code style="color:inherit; border:inherit; padding:inherit;">|lccn=</code> value The <code>|lccn=</code> parameter is the <a href="/wiki/Library_of_Congress_Control_Number" class="mw-redirect" title="Library of Congress Control Number">Library of Congress Control Number</a> identifier. It is checked to ensure that the identifier is the proper length and has the correct initial digits. LCCN is a character string 8–12 characters long. The length of the LCCN dictates the character type of the initial 1–3 characters; the rightmost eight are always digits.<a href="#cite_note-5">[4]</a> <table class="wikitable"> <caption>LCCN format description </caption> <tbody><tr> <th>Length</th> <th>Description </th></tr> <tr> <td>8</td> <td>all characters are digits </td></tr> <tr> <td>9</td> <td>first character is a lower case letter </td></tr> <tr> <td>10</td> <td>first two characters are either both lower case letters or both digits </td></tr> <tr> <td>11</td> <td>first character is a lower case letter, second and third characters are either both lower case letters or both digits </td></tr> <tr> <td>12</td> <td>first two characters are both lower case letters </td></tr> </tbody></table> Further validation is not performed. To resolve this error, ensure that the <code>|lccn=</code> value is correct and that there are no other letters, punctuation, or other characters. Pages with this error are automatically placed in <a href="/w/index.php?title=Categori:CS1_errors:_LCCN&action=edit&redlink=1" class="new" title="Categori:CS1 errors: LCCN (dim tudalen ar gael)">Category:CS1 errors: LCCN</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Check_|message-id=_value" data-mw-thread-id="h-Check_|message-id=_value">Check |message-id= value</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=14" title="Golygu'r adran: Check |message-id= value" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=14" title="Edit section's source code: Check |message-id= value">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a>Check <code style="color:inherit; border:inherit; padding:inherit;">|message-id=</code> value The <code>|message-id=</code> parameter holds the unique identifier associated with a netnews message.<a href="#cite_note-6">[5]</a> The value in <code>|message-id=</code> is checked to make sure that it contains <code>@</code> between left and right identifiers. <code>|message-id=</code> is also checked to make sure that the first character is not <code><</code> and the last character is not <code>></code>. <a href="/wiki/Modiwl:Citation/CS1" title="Modiwl:Citation/CS1">Module:Citation/CS1</a> adds the uri <code>news:</code> to the value in <code>|message-id=</code>. If the value in <code>|message-id=</code> is wrapped in <code><...></code> characters, the link created fails. Further validation is not performed. To resolve this error, ensure that the <code>|message-id=</code> value is correct, that it contains <code>@</code> and is not wrapped in <code><...></code> characters. Pages with this error are automatically placed in <a href="/w/index.php?title=Categori:CS1_errors:_message-id&action=edit&redlink=1" class="new" title="Categori:CS1 errors: message-id (dim tudalen ar gael)">Category:CS1 errors: message-id</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Check_|ol=_value" data-mw-thread-id="h-Check_|ol=_value">Check |ol= value</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=15" title="Golygu'r adran: Check |ol= value" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=15" title="Edit section's source code: Check |ol= value">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a>Check <code style="color:inherit; border:inherit; padding:inherit;">|ol=</code> value The <code>|ol=</code> parameter is the <a href="/w/index.php?title=Open_Library&action=edit&redlink=1" class="new" title="Open Library (dim tudalen ar gael)">Open Library</a> identifier. The identifier is one or more digits followed by a last character that is either <code>A</code> (authors), <code>M</code> (books), or <code>W</code> (works). Further validation is not performed. To resolve this error, ensure that the <code>|ol=</code> value is correct. Do not include "OL" in the value. Pages with this error are automatically placed in <a href="/w/index.php?title=Categori:CS1_errors:_OL&action=edit&redlink=1" class="new" title="Categori:CS1 errors: OL (dim tudalen ar gael)">Category:CS1 errors: OL</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Check_|pmc=_value" data-mw-thread-id="h-Check_|pmc=_value">Check |pmc= value</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=16" title="Golygu'r adran: Check |pmc= value" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=16" title="Edit section's source code: Check |pmc= value">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a>Check <code style="color:inherit; border:inherit; padding:inherit;">|pmc=</code> value The <code>|pmc=</code> parameter is the <a href="/w/index.php?title=PubMed_Central&action=edit&redlink=1" class="new" title="PubMed Central (dim tudalen ar gael)">PubMed Central</a> identifier. PMCs are sequential numbers beginning at 1 and counting up. <a href="/wiki/Modiwl:Citation/CS1" title="Modiwl:Citation/CS1">Module:Citation/CS1</a> checks the PMC identifier to make sure that the value is a number greater than zero and less than 5000000 and that the identifier contains only digits. Further validation is not performed. To resolve this error, ensure that the <code>|pmc=</code> value is correct, and that there are no letters, punctuation, or other characters. Do not include "PMC" in the value. Pages with this error are automatically placed in <a href="/wiki/Categori:CS1_errors:_PMC" title="Categori:CS1 errors: PMC">Category:CS1 errors: PMC</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Check_|pmid=_value" data-mw-thread-id="h-Check_|pmid=_value">Check |pmid= value</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=17" title="Golygu'r adran: Check |pmid= value" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=17" title="Edit section's source code: Check |pmid= value">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a>Check <code style="color:inherit; border:inherit; padding:inherit;">|pmid=</code> value The <code>|pmid=</code> parameter is the <a href="/wiki/PubMed#PubMed_identifier" title="PubMed">PubMed identifier</a>. PMIDs are checked to ensure that the identifier is a simple number without punctuation or spaces with a value greater than or equal to 1 and less than or equal to 30000000. Further validation is not performed. To resolve this error, ensure that the <code>|pmid=</code> value is correct. If you find something that looks like a PMID and begins with "PMC", use <code>|pmc=</code> instead of <code>|pmid=</code>. Pages with this error are automatically placed in <a href="/wiki/Categori:CS1_errors:_PMID" title="Categori:CS1 errors: PMID">Category:CS1 errors: PMID</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Check_|url=_scheme" data-mw-thread-id="h-Check_|url=_scheme">Check |url= scheme</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=18" title="Golygu'r adran: Check |url= scheme" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=18" title="Edit section's source code: Check |url= scheme">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a>Check <code style="color:inherit; border:inherit; padding:inherit;">|url=</code> scheme External links in <a href="/w/index.php?title=Cymorth:Citation_Style_1&action=edit&redlink=1" class="new" title="Cymorth:Citation Style 1 (dim tudalen ar gael)">CS1 citations</a> are made from two parts: the title (<code>|title=</code>, <code>|chapter=</code>, etc.) and the URL (<code>|url=</code>, <code>|archive-url=</code>, <code>|chapter-url=</code>, <code>|lay-summary=</code>, etc.). The <code>|url=</code> parameter and other URL parameters must begin with a supported <a href="/w/index.php?title=URI_scheme&action=edit&redlink=1" class="new" title="URI scheme (dim tudalen ar gael)">URI scheme</a>. The URI schemes <code>http://</code>, <code>https://</code> and the protocol relative scheme <code>//</code> are most commonly used; <code>irc://</code>, <code>ircs://</code>, <code>ftp://</code>, <code>news:</code>, <code>mailto:</code> and <code>gopher://</code> are also supported. The URL field is checked to ensure it includes either a colon (<code>:</code>) or the double forward slash (<code>//</code>). Further validation is not performed. To resolve this error, ensure that <code>|url=</code> and other URL parameters contain valid URLs. Pages with this error are automatically placed in <a href="/wiki/Categori:Pages_with_URL_errors" title="Categori:Pages with URL errors">Category:Pages with URL errors</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Cite_uses_deprecated_parameters" data-mw-thread-id="h-Cite_uses_deprecated_parameters">Cite uses deprecated parameters</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=19" title="Golygu'r adran: Cite uses deprecated parameters" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=19" title="Edit section's source code: Cite uses deprecated parameters">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a>Cite uses deprecated parameters (error message hidden by default) Over time, some parameters have become obsolete or unnecessary. When this happens, the parameters are identified as deprecated. Editors are encouraged to use other parameters that accomplish the same purpose as those that have been deprecated. The CS1 deprecated parameters are listed in the following table, along with recommended replacement parameters. <table class="wikitable"> <caption>Deprecated CS1 parameters </caption> <tbody><tr> <th>Parameter</th> <th>Replace with </th></tr> <tr> <td><code>|author-format=</code> <code>|authorformat=</code></td> <td><code>|name-list-format=</code> </td></tr> <tr> <td><code>|author-name-separator=</code></td> <td><code>|name-list-format=</code> </td></tr> <tr> <td><code>|author-separator=</code></td> <td><code>|name-list-format=</code> </td></tr> <tr> <td><code>|chapter-link=</code></td> <td>If appropriate, <code>|chapter=</code> may be wikilinked </td></tr> <tr> <td><code>|coauthor=</code> <code>|coauthors=</code></td> <td><code>|last1=</code>, <code>|first1=</code>, <code>|last2=</code>, <code>|first2=</code>, etc.; or <code>|author1=</code>, <code>|author2=</code>, ... </td></tr> <tr> <td><code>|editor-format=</code> <code>|editorformat=</code></td> <td><code>|name-list-format=</code> </td></tr> <tr> <td><code>|editor-name-separator=</code></td> <td><code>|name-list-format=</code> </td></tr> <tr> <td><code>|editor-separator=</code></td> <td><code>|name-list-format=</code> </td></tr> <tr> <td><code>|month=</code></td> <td>Incorporate into <code>|date=</code> along with the year. </td></tr> <tr> <td><code>|name-separator=</code></td> <td><code>|name-list-format=</code> </td></tr> <tr> <td><code>|separator=</code></td> <td><code>|mode=cs1</code> or <code>|mode=cs2</code> </td></tr></tbody></table> To resolve this error, use an alternate parameter. Pages with this error are automatically placed in <a href="/wiki/Categori:Pages_containing_cite_templates_with_deprecated_parameters" title="Categori:Pages containing cite templates with deprecated parameters">Category:Pages containing cite templates with deprecated parameters</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="|coauthors=_requires_|author=" data-mw-thread-id="h-|coauthors=_requires_|author=">|coauthors= requires |author=</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=20" title="Golygu'r adran: |coauthors= requires |author=" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=20" title="Edit section's source code: |coauthors= requires |author=">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a><code style="color:inherit; border:inherit; padding:inherit;">|coauthors=</code> requires <code style="color:inherit; border:inherit; padding:inherit;">|author=</code> <code>|coauthor=</code> and <code>|coauthors=</code> are deprecated parameters. Where they exist without accompanying <code>|author=</code>, <code>|authors=</code>, or <code>|last=</code>, the content of <code>|coauthor=</code> or <code>|coauthors=</code> is not displayed. To resolve this error, use <code>|author1=</code>, <code>|author2=</code>, etc., or use <code>|last1=</code>, <code>|first1=</code>, <code>|last2=</code>, <code>|first2=</code>, etc. to individually list all authors. Pages with this error are automatically placed in <a href="/w/index.php?title=Categori:CS1_errors:_coauthors_without_author&action=edit&redlink=1" class="new" title="Categori:CS1 errors: coauthors without author (dim tudalen ar gael)">Category:CS1 errors: coauthors without author</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="|displayeditors=_suggested" data-mw-thread-id="h-|displayeditors=_suggested">|displayeditors= suggested</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=21" title="Golygu'r adran: |displayeditors= suggested" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=21" title="Edit section's source code: |displayeditors= suggested">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a><code style="color:inherit; border:inherit; padding:inherit;">|displayeditors=</code> suggested (error message hidden by default) To resolve this error for cited sources with more than four editors, add the remaining editors to the citation or set <code>|display-editors=</code> to <code>3</code> or some lesser value to truncate the editor list. If there are exactly four editors, then set <code>|display-editors=</code> to <code>4</code> or higher to display all four editors without including "et al." Prior to the introduction of <a href="/w/index.php?title=Wicipedia:LUA&action=edit&redlink=1" class="new" title="Wicipedia:LUA (dim tudalen ar gael)">Lua</a>-based citations, the citation formatting templates were designed to support no more than four editors. Specifically, if four (or more) editor parameters were specified, then the template would display three editor names followed by "et al." to indicate that the list had been truncated. Some editors relied on this behavior to include the "et al." label. For example: <a href="/w/index.php?title=Nodyn:Cite_compare&action=edit&redlink=1" class="new" title="Nodyn:Cite compare (dim tudalen ar gael)">Nodyn:Cite compare</a> The Lua-based citation templates can accommodate an arbitrarily large number of editors. The Lua-based templates can also explicitly include an "et al." label with the new <code>|display-editors=</code> parameter, a parameter that was not available to the old-style templates. <a href="/w/index.php?title=Nodyn:Cite_compare&action=edit&redlink=1" class="new" title="Nodyn:Cite compare (dim tudalen ar gael)">Nodyn:Cite compare</a> The old-style templates supported at most four editors. The new Lua-based templates cannot know if Wikipedia editors created citations with exactly four editors because there were only four editors or, because old-style citations were limited to four editors. This error message is reported by citations with exactly four editors but without <code>|display-editors=</code>. To preserve the behavior of old-style citations, Lua-based citations display "et al." in place of the fourth editor. Pages with this error are automatically placed in <a href="/w/index.php?title=Categori:Pages_using_citations_with_old-style_implicit_et_al._in_editors&action=edit&redlink=1" class="new" title="Categori:Pages using citations with old-style implicit et al. in editors (dim tudalen ar gael)">Category:Pages using citations with old-style implicit et al. in editors</a><a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Empty_citation" data-mw-thread-id="h-Empty_citation">Empty citation</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=22" title="Golygu'r adran: Empty citation" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=22" title="Edit section's source code: Empty citation">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a>Empty citation "Empty" may mean that the <a href="/w/index.php?title=Cymorth:Citation_Style_1&action=edit&redlink=1" class="new" title="Cymorth:Citation Style 1 (dim tudalen ar gael)">CS1 citation</a> contains no recognizable parameter identifiers. For example this citation isn't "empty" because it contains usable information: <dl><dd><code>{{cite web | http://www.foobar.com | The Foobar Bar}}</code></dd></dl> The citation is "empty" because it doesn't contain the necessary parameter identifiers (in this case <code>|url=</code> and <code>|title=</code>) that tell <code>{{<a href="/wiki/Nodyn:Cite_web" title="Nodyn:Cite web">cite web</a>}}</code> how to use the information that the citation does contain. "Empty" may also mean that an editor meant to use another template entirely. Perhaps the editor used <code>{{<a href="/wiki/Nodyn:Citation" title="Nodyn:Citation">citation</a>}}</code> when the intent was to use <code>{{<a href="/wiki/Nodyn:Citation_needed" title="Nodyn:Citation needed">citation needed</a>}}</code> or <code>{{<a href="/wiki/Nodyn:Quote" title="Nodyn:Quote">quote</a>}}</code>. To resolve this error, add appropriate parameter identifiers or replace the CS1 citation with a more appropriate template. Pages with this error are automatically placed in <a href="/wiki/Categori:Pages_with_empty_citations" title="Categori:Pages with empty citations">Category:Pages with empty citations</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Extra_|pages=_or_|at=" data-mw-thread-id="h-Extra_|pages=_or_|at=">Extra |pages= or |at=</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=23" title="Golygu'r adran: Extra |pages= or |at=" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=23" title="Edit section's source code: Extra |pages= or |at=">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a>Extra <code style="color:inherit; border:inherit; padding:inherit;">|pages=</code> or <code style="color:inherit; border:inherit; padding:inherit;">|at=</code> This error occurs when <a href="/w/index.php?title=Cymorth:Citation_Style_1&action=edit&redlink=1" class="new" title="Cymorth:Citation Style 1 (dim tudalen ar gael)">CS1 citations</a> attempt to simultaneously use more than one of the parameters: <code>|page=</code>, <code>|pages=</code>, or <code>|at=</code>. Each of these parameters is meant to provide a different way of specifying the location within a larger work, of the cited content, that is, of the specific page(s) or place in a cited source that contains the information that supports the article text. Only one of these parameters is displayed in any rendered citation. According to their intended purpose, <code>|page=</code> should be used to specify a single page that is relevant to the cited content, <code>|pages=</code> should be used to specify a range or list of pages (e.g. 37–42) that are relevant, and <code>|at=</code> should be used to indicate a location in the larger work that is not a numbered page (e.g. "back cover"). Sometimes, editors misunderstand the meaning of <code>|pages=</code>, and attempt to use it to indicate the total number of pages in the resource. When <code>|page=</code> is used with either or both of <code>|pages=</code> or <code>|at=</code>, only the <code>|page=</code> value is displayed. Similarly, when <code>|pages=</code> is used with <code>|at=</code>, only the <code>|pages=</code> value is displayed. To resolve this error, remove the inappropriate parameter. Pages with this error are automatically placed in <a href="/w/index.php?title=Categori:Pages_with_citations_using_conflicting_page_specifications&action=edit&redlink=1" class="new" title="Categori:Pages with citations using conflicting page specifications (dim tudalen ar gael)">Category:Pages with citations using conflicting page specifications</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="|firstn=_missing_|lastn=_in_Authors/Editors_list" data-mw-thread-id="h-|firstn=_missing_|lastn=_in_Authors/Editors_list">|firstn= missing |lastn= in Authors/Editors list</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=24" title="Golygu'r adran: |firstn= missing |lastn= in Authors/Editors list" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=24" title="Edit section's source code: |firstn= missing |lastn= in Authors/Editors list">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a><code style="color:inherit; border:inherit; padding:inherit;">|firstn=</code> missing <code style="color:inherit; border:inherit; padding:inherit;">|lastn=</code> in Authors list <code style="color:inherit; border:inherit; padding:inherit;">|firstn=</code> missing <code style="color:inherit; border:inherit; padding:inherit;">|lastn=</code> in Editors list <a href="/w/index.php?title=Cymorth:Citation_Style_1&action=edit&redlink=1" class="new" title="Cymorth:Citation Style 1 (dim tudalen ar gael)">Citation Style 1</a> requires a <code>|lastn=</code> parameter for each <code>|firstn=</code> parameter in a citation. Author and editor lists are checked for proper last/first pairing. CS1 will emit this error message for the first mismatch it detects. If there are more last/first mismatches in a citation, subsequent mismatches are not detected. There is no requirement that each <code>|lastn=</code> have a matching <code>|firstn=</code>. The error message uses a sort of shorthand: <code>|lastn=</code> can refer to any of the legitimate <code>|author=</code> aliases in the authors list. Similarly, <code>|lastn=</code> refers to any of the <code>|editor-last=</code> aliases in the editors list. To resolve this error, ensure that each <code>|firstn=</code> has a corresponding <code>|lastn=</code>. Pages with this error are automatically placed in <a href="/w/index.php?title=Categori:CS1_errors:_missing_author_or_editor&action=edit&redlink=1" class="new" title="Categori:CS1 errors: missing author or editor (dim tudalen ar gael)">Category:CS1 errors: missing author or editor</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="|format=_requires_|url=" data-mw-thread-id="h-|format=_requires_|url=">|format= requires |url=</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=25" title="Golygu'r adran: |format= requires |url=" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=25" title="Edit section's source code: |format= requires |url=">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a><code style="color:inherit; border:inherit; padding:inherit;">|format=</code> requires <code style="color:inherit; border:inherit; padding:inherit;">|url=</code> (error message hidden by default) <code style="color:inherit; border:inherit; padding:inherit;">|chapter-format=</code> requires <code style="color:inherit; border:inherit; padding:inherit;">|chapter-url=</code> (error message hidden by default) These errors occur when <a href="/w/index.php?title=Cymorth:Citation_Style_1&action=edit&redlink=1" class="new" title="Cymorth:Citation Style 1 (dim tudalen ar gael)">CS1 citations</a> use <code>|format=</code> or <code>|chapter-format=</code> without also providing a corresponding URL for <code>|url=</code> or <code>|chapter-url=</code>, respectively. The <code>|format=</code> and <code>|chapter-format=</code> parameters are used to specify the file format of a web resource (e.g. <a href="/wiki/PDF" class="mw-redirect" title="PDF">PDF</a>, <a href="/w/index.php?title=Doc_(computing)&action=edit&redlink=1" class="new" title="Doc (computing) (dim tudalen ar gael)">DOC</a>, <a href="/w/index.php?title=Microsoft_Excel_file_format&action=edit&redlink=1" class="new" title="Microsoft Excel file format (dim tudalen ar gael)">XLS</a>, etc.). In some cases an editor may have intended to use <code>|type=</code> to specify a kind of document (e.g. hard cover, paperback, pamphlet, etc.) The <code>|format=</code> and <code>|chapter-format=</code> value are always displayed. As of 29 November 2014, <code>|chapter-format=</code> is a new parameter. Citations that relied on the old, somewhat odd use of <code>|url=</code> and <code>|format=</code> may need adjustment. To resolve this error, remove <code>|format=</code> or <code>|chapter-format=</code>; define <code>|url=</code> or <code>|chapter-url=</code>; or change <code>|format=</code> to <code>|type=</code> (or to <code>|chapter-format=</code> if <code>|chapter-url=</code> is used without <code>|url=</code>. Pages with this error are automatically placed in <a href="/wiki/Categori:Pages_using_citations_with_format_and_no_URL" title="Categori:Pages using citations with format and no URL">Category:Pages using citations with format and no URL</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Invalid_parameter_value" data-mw-thread-id="h-Invalid_parameter_value">Invalid parameter value</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=26" title="Golygu'r adran: Invalid parameter value" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=26" title="Edit section's source code: Invalid parameter value">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a>Invalid <code style="color:inherit; border:inherit; padding:inherit;">|<parameter>=<value></code> To function properly, some parameters are limited to a certain set set of acceptable values. This error message indicates that a parameter has been assigned a value that is not a member of the parameter's defined set of acceptable values. Parameters with limited acceptable values are: <dl><dd><code>|mode=</code> <dl><dd>acceptable values: <code>cs1</code> and <code>CS2</code></dd></dl></dd> <dd><code>|name-list-format=</code> <dl><dd>acceptable values: <code>vanc</code></dd></dl></dd></dl> The deprecated parameters <code>|author-format=</code>, <code>|authorformat=</code>, <code>|editor-format=</code>, and <code>|editorformat=</code> are aliases of <code>|name-list-format=</code> and are reported as <code>|name-list-format=</code>. To resolve this error, use an appropriate value. Because of a software flaw, pages with this error message are not correctly categorized. <s>Pages with this error are automatically placed in <a href="/wiki/Categori:CS1_errors:_invalid_parameter_value" title="Categori:CS1 errors: invalid parameter value">Category:CS1 errors: invalid parameter value</a>.</s><a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Missing_|lastn=_in_Authors/Editors_list" data-mw-thread-id="h-Missing_|lastn=_in_Authors/Editors_list">Missing |lastn= in Authors/Editors list</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=27" title="Golygu'r adran: Missing |lastn= in Authors/Editors list" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=27" title="Edit section's source code: Missing |lastn= in Authors/Editors list">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a>Missing <code style="color:inherit; border:inherit; padding:inherit;">|lastn=</code> in Authors list Missing <code style="color:inherit; border:inherit; padding:inherit;">|lastn=</code> in Editors list So that all authors and editors are listed in a rendered citation, <a href="/w/index.php?title=Cymorth:Citation_Style_1&action=edit&redlink=1" class="new" title="Cymorth:Citation Style 1 (dim tudalen ar gael)">Citation Style 1</a> requires n in <code>|lastn=</code> (and its aliases) to increment by 1 for each author or editor. This error message is emitted when there is a 'hole' in the numbering (an author list made up of <code>|author1=</code> and <code>|author3=</code> but without <code>|author2=</code> for example). The test will not detect a 'hole' that is larger than 1. It is presumed that when <code>|authorn=</code> and <code>|authorn+1=</code> are both not present, then the test has reached the end of the list. The error message uses a sort of shorthand: <code>|lastn=</code> can refer to any of the legitimate <code>|author=</code> aliases in the authors list. Similarly, <code>|lastn=</code> refers to any of the <code>|editor-last=</code> aliases in the editors list. To resolve this error, ensure that the numbering of the <code>|lastn=</code> parameters increments properly. Pages with this error are automatically placed in <a href="/w/index.php?title=Categori:CS1_errors:_missing_author_or_editor&action=edit&redlink=1" class="new" title="Categori:CS1 errors: missing author or editor (dim tudalen ar gael)">Category:CS1 errors: missing author or editor</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Missing_or_empty_|title=" data-mw-thread-id="h-Missing_or_empty_|title=">Missing or empty |title=</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=28" title="Golygu'r adran: Missing or empty |title=" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=28" title="Edit section's source code: Missing or empty |title=">golygu cod</a>]</div> There are two slightly different error conditions that can arise when <a href="/w/index.php?title=Cymorth:Citation_Style_1&action=edit&redlink=1" class="new" title="Cymorth:Citation Style 1 (dim tudalen ar gael)">CS1 citations</a> lack appropriate titles. In each case, CS1 reports this error message. The necessary resolution may vary depending on the cause of the error. The error message links to the appropriate description below. <div class="mw-heading mw-heading3"><h3 id="Bare_URL_without_a_title" data-mw-thread-id="h-Bare_URL_without_a_title-Missing_or_empty_|title=">Bare URL without a title</h3>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=29" title="Golygu'r adran: Bare URL without a title" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=29" title="Edit section's source code: Bare URL without a title">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a><code style="color:inherit; border:inherit; padding:inherit;">|<param>=</code> missing title All <a href="/w/index.php?title=Lua_(programming_language)&action=edit&redlink=1" class="new" title="Lua (programming language) (dim tudalen ar gael)">Lua</a>-based <a href="/w/index.php?title=Cymorth:Citation_Style_1&action=edit&redlink=1" class="new" title="Cymorth:Citation Style 1 (dim tudalen ar gael)">CS1 citations</a> report this error when one of the <a href="/wiki/URL" title="URL">URL</a>-containing parameters cannot be paired with an associated title. This error may also occur when <code>|title=</code> cannot be linked with <code>|url=</code> because the citation also contains a conflicting <code>|title-link=</code> parameter. <table class="wikitable"> <caption>URL-containing parameters and associated title parameters </caption> <tbody><tr> <th>URL parameters </th> <th>Title parameters </th></tr> <tr> <td><code>|archive-url=</code> </td> <td><code>|title=</code> </td></tr> <tr> <td><code>|chapter-url=</code> </td> <td><code>|chapter=</code>, <code>|contribution=</code>, <code>|entry=</code>, <code>|article=</code> </td></tr> <tr> <td><code>|conference-url=</code> </td> <td><code>|conference=</code> </td></tr> <tr> <td><code>|contribution-url=</code> </td> <td><code>|chapter=</code>, <code>|contribution=</code>, <code>|entry=</code>, <code>|article=</code> </td></tr> <tr> <td><code>|transcript-url=</code> </td> <td><code>|transcript=</code> </td></tr> <tr> <td><code>|url=</code> </td> <td><code>|title=</code> </td></tr></tbody></table> A unique case exists: if <code>|pmc=</code> has a value and <code>|url=</code> is omitted or empty, then <code>|title=</code> is linked with the same URL as the PMC. Because URLs are ugly and generally uninformative, it is expected that editors should provide a meaningful title for each URL. In most cases this can be accomplished by using the <code>|title=</code> parameter. To resolve this error, provide an appropriate title for the URL-containing parameter. In the case where <code>|url=</code> and <code>|title-link=</code> are contending for <code>|title=</code> you must choose which one to keep. Consider moving <code>|url=</code> or <code>|title-link=</code> to a more suitable parameter. Pages with this error are automatically placed in <a href="/wiki/Categori:Pages_with_citations_having_bare_URLs" title="Categori:Pages with citations having bare URLs">Category:Pages with citations having bare URLs</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading3"><h3 id="Citation_without_a_title_of_any_form" data-mw-thread-id="h-Citation_without_a_title_of_any_form-Missing_or_empty_|title=">Citation without a title of any form</h3>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=30" title="Golygu'r adran: Citation without a title of any form" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=30" title="Edit section's source code: Citation without a title of any form">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a>Missing or empty <code style="color:inherit; border:inherit; padding:inherit;">|title=</code> This error occurs for <a href="/w/index.php?title=Cymorth:Citation_Style_1&action=edit&redlink=1" class="new" title="Cymorth:Citation Style 1 (dim tudalen ar gael)">CS1 citations</a> when all of the associated title parameters are omitted or left blank. Depending on the type of citation (<code>{{<a href="/wiki/Nodyn:Cite_web" title="Nodyn:Cite web">cite web</a>}}</code>, <code>{{<a href="/wiki/Nodyn:Cite_book" title="Nodyn:Cite book">cite book</a>}}</code>, <code>{{<a href="/wiki/Nodyn:Cite_journal" title="Nodyn:Cite journal">cite journal</a>}}</code>, etc.), the possible title parameters may include <code>|title=</code>, <code>|chapter=</code>, <code>|article=</code>, <code>|journal=</code>, <code>|book-title=</code>, and so forth. At least one such title parameter must be provided for each citation. Sometimes this error occurs because an editor has used a CS1 citation as a <a href="/w/index.php?title=Cymorth:Shortened_footnotes&action=edit&redlink=1" class="new" title="Cymorth:Shortened footnotes (dim tudalen ar gael)">shortened footnote</a> when <code>{{<a href="/wiki/Nodyn:Sfn" title="Nodyn:Sfn">sfn</a>}}</code> or one of the <code>{{<a href="/wiki/Nodyn:Harv" title="Nodyn:Harv">harv</a>}}</code> family of templates would have been more appropriate. This error also occurs when an editor used <code>{{<a href="/wiki/Nodyn:Citation" title="Nodyn:Citation">citation</a>}}</code> but intended to use <code>{{<a href="/wiki/Nodyn:Citation_needed" title="Nodyn:Citation needed">citation needed</a>}}</code>. To resolve this error, provide a value for <code>|title=</code> or replace the CS1 citation with a more appropriate template. Pages with this error are automatically placed in <a href="/wiki/Categori:Pages_with_citations_lacking_titles" title="Categori:Pages with citations lacking titles">Category:Pages with citations lacking titles</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Missing_or_empty_|url=" data-mw-thread-id="h-Missing_or_empty_|url=">Missing or empty |url=</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=31" title="Golygu'r adran: Missing or empty |url=" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=31" title="Edit section's source code: Missing or empty |url=">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a>Missing or empty <code style="color:inherit; border:inherit; padding:inherit;">|url=</code> (error message hidden by default) This error message is reported by <code>{{<a href="/wiki/Nodyn:Cite_web" title="Nodyn:Cite web">cite web</a>}}</code>, <code>{{<a href="/wiki/Nodyn:Cite_podcast" title="Nodyn:Cite podcast">cite podcast</a>}}</code>, and <code>{{<a href="/w/index.php?title=Nodyn:Cite_mailing_list&action=edit&redlink=1" class="new" title="Nodyn:Cite mailing list (dim tudalen ar gael)">cite mailing list</a>}}</code> when the template parameters <code>|url=</code> and <code>|archive-url=</code> are both missing, blank or not properly entered. Note that <code>|website=</code> or <code>|work=</code> is the name of the site, not the URL. To resolve this error, provide a value for <code>|url=</code> or use a more appropriate template such as {{<a href="/wiki/Nodyn:Cite_book" title="Nodyn:Cite book">cite book</a>}}, {{<a href="/wiki/Nodyn:Cite_journal" title="Nodyn:Cite journal">cite journal</a>}} or other <a href="/w/index.php?title=Cymorth:Citation_Style_1&action=edit&redlink=1" class="new" title="Cymorth:Citation Style 1 (dim tudalen ar gael)">Citation Style 1</a> template. Pages with this error are automatically placed in <a href="/wiki/Categori:Pages_using_web_citations_with_no_URL" title="Categori:Pages using web citations with no URL">Category:Pages using web citations with no URL</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="More_than_one_of_|param1=,_|param2=,_and_|param3=_specified" data-mw-thread-id="h-More_than_one_of_|param1=,_|param2=,_and_|param3=_specified">More than one of |param1=, |param2=, and |param3= specified</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=32" title="Golygu'r adran: More than one of |param1=, |param2=, and |param3= specified" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=32" title="Edit section's source code: More than one of |param1=, |param2=, and |param3= specified">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a>More than one of <code style="color:inherit; border:inherit; padding:inherit;">|param1=</code>, <code style="color:inherit; border:inherit; padding:inherit;">|param2=</code>, and <code style="color:inherit; border:inherit; padding:inherit;">|param3=</code> specified This error occurs when a <a href="/w/index.php?title=Cymorth:Citation_Style_1&action=edit&redlink=1" class="new" title="Cymorth:Citation Style 1 (dim tudalen ar gael)">CS1 citation</a> includes more than one parameter that maps to the same meaning. For example, <code>|author=</code>, <code>|last=</code>, and <code>|last1=</code> are all synonyms of each other, so no more than one of these parameters should ever be used in a single citation. To resolve this error, remove or modify the redundant parameter(s). Pages with this error are automatically placed in <a href="/wiki/Categori:Pages_with_citations_having_redundant_parameters" title="Categori:Pages with citations having redundant parameters">Category:Pages with citations having redundant parameters</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Text_"????"_ignored" data-mw-thread-id="h-Text_"????"_ignored">Text "????" ignored</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=33" title="Golygu'r adran: Text "????" ignored" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=33" title="Edit section's source code: Text "????" ignored">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a>Text "????" ignored Unlike many Wikipedia templates, the <a href="/w/index.php?title=Cymorth:Citation_Style_1&action=edit&redlink=1" class="new" title="Cymorth:Citation Style 1 (dim tudalen ar gael)">CS1 citations</a> do not use unnamed or positional parameters. When a citation contains text between <a href="/w/index.php?title=Vertical_bar&action=edit&redlink=1" class="new" title="Vertical bar (dim tudalen ar gael)">vertical bars</a> and that text does not contain an equal sign (=), CS1 ignores the text and reports the error. This is true even when the text is the name of a valid parameter. This error can also be caused by vertical bars that are part of URLs or titles. When vertical bars occur in URLs, replace each vertical bar with <code>%7c</code>. When vertical bars occur in parameter values that are not URLs, replace each vertical bar with <code>&#124;</code>. To resolve this error, remove the extraneous text, add '=', add an appropriate parameter name from the <a href="/w/index.php?title=Cymorth:Citation_Style_1&action=edit&redlink=1" class="new" title="Cymorth:Citation Style 1 (dim tudalen ar gael)">citation template</a> you're using to complete the parameter, or properly encode vertical bars in URLs and titles. Pages with this error are automatically placed in <a href="/wiki/Categori:Pages_with_citations_using_unnamed_parameters" title="Categori:Pages with citations using unnamed parameters">Category:Pages with citations using unnamed parameters</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="|trans_chapter=_requires_|chapter=" data-mw-thread-id="h-|trans_chapter=_requires_|chapter=">|trans_chapter= requires |chapter=</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=34" title="Golygu'r adran: |trans_chapter= requires |chapter=" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=34" title="Edit section's source code: |trans_chapter= requires |chapter=">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a><code style="color:inherit; border:inherit; padding:inherit;">|trans_chapter=</code> requires <code style="color:inherit; border:inherit; padding:inherit;">|chapter=</code> This error occurs when a <a href="/w/index.php?title=Cymorth:Citation_Style_1&action=edit&redlink=1" class="new" title="Cymorth:Citation Style 1 (dim tudalen ar gael)">CS1 citation</a> has an English translation of a chapter title in <code>|trans-chapter=</code> but does not have the original-language chapter title in <code>|chapter=</code>. To resolve this error, provide a value for <code>|chapter=</code>. Consider adding <code>|language=</code> if not already part of the citation. Pages with this error are automatically placed in <a href="/w/index.php?title=Categori:Pages_with_citations_using_translated_terms_without_the_original&action=edit&redlink=1" class="new" title="Categori:Pages with citations using translated terms without the original (dim tudalen ar gael)">Category:Pages with citations using translated terms without the original</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="|trans_title=_requires_|title=" data-mw-thread-id="h-|trans_title=_requires_|title=">|trans_title= requires |title=</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=35" title="Golygu'r adran: |trans_title= requires |title=" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=35" title="Edit section's source code: |trans_title= requires |title=">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a><code style="color:inherit; border:inherit; padding:inherit;">|trans_title=</code> requires <code style="color:inherit; border:inherit; padding:inherit;">|title=</code> <a href="/w/index.php?title=Cymorth:Citation_Style_1&action=edit&redlink=1" class="new" title="Cymorth:Citation Style 1 (dim tudalen ar gael)">CS1 citations</a> report this error when the citation has an English translation of the title in <code>|trans-title=</code> but does not have the original-language title in <code>|title=</code>. To resolve this error, provide the original language title for <code>|title=</code>. Consider adding <code>|language=</code> if not already part of the citation. Pages with this error are automatically placed in <a href="/w/index.php?title=Categori:Pages_with_citations_using_translated_terms_without_the_original&action=edit&redlink=1" class="new" title="Categori:Pages with citations using translated terms without the original (dim tudalen ar gael)">Category:Pages with citations using translated terms without the original</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Unknown_parameter_|xxxx=_ignored" data-mw-thread-id="h-Unknown_parameter_|xxxx=_ignored">Unknown parameter |xxxx= ignored </h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=36" title="Golygu'r adran: Unknown parameter |xxxx= ignored" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=36" title="Edit section's source code: Unknown parameter |xxxx= ignored">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a>Unknown parameter <code style="color:inherit; border:inherit; padding:inherit;">|xxxx=</code> ignored Unknown parameter <code style="color:inherit; border:inherit; padding:inherit;">|xxxx=</code> ignored (<code style="color:inherit; border:inherit; padding:inherit;">|yyyy=</code> suggested) <a href="/w/index.php?title=Cymorth:Citation_Style_1&action=edit&redlink=1" class="new" title="Cymorth:Citation Style 1 (dim tudalen ar gael)">CS1 citations</a> report this error when the name portion of a parameter's <code>|name=value</code> pair is not recognized as a valid name. Typically, this is caused by spelling errors. With the old-style citation templates, it was possible to include information within the template that was simply ignored as unrecognized parameters. The Lua-based CS1 engine does not ignore unrecognized parameters. The purpose of the citation is to properly identify the source; not act as a repository of notes and ancillary information. With very few exceptions, CS1 citation parameters are lower case. CS1 will report this error when the parameter's name contains uppercase letters (Xxxx, xxXx, XXXX) but the parameter's name is defined as lowercase (xxxx). Some parameters, like <code>|isbn=</code>, can be either lower case or upper case, but not of mixed case (<code>|isbn=</code> or <code>|ISBN=</code> but not <code>|Isbn=</code>). For <a href="/wiki/Modiwl:Citation/CS1/Suggestions" title="Modiwl:Citation/CS1/Suggestions">common parameter misspellings</a>, like <code>|pubisher=</code> instead of <code>|publisher=</code>, CS1 will suggest a valid parameter name. To resolve this error, replace the erroneous parameter name with a correct one, possibly using the suggested name. Ensure that the parameter's name is correctly spelled and that there are no characters except spaces between the parameter's name and the leading vertical bar (|) or trailing equal sign (=). A list of valid parameters can be found by consulting <a href="/w/index.php?title=Cymorth:Citation_Style_1&action=edit&redlink=1" class="new" title="Cymorth:Citation Style 1 (dim tudalen ar gael)">Help:Citation Style 1</a> or visiting the description page of the specific template being used, such as <code>{{<a href="/wiki/Nodyn:Cite_web" title="Nodyn:Cite web">cite web</a>}}</code>, <code>{{<a href="/wiki/Nodyn:Cite_book" title="Nodyn:Cite book">cite book</a>}}</code>, <code>{{<a href="/wiki/Nodyn:Cite_journal" title="Nodyn:Cite journal">cite journal</a>}}</code>, etc. Consider moving information associated with the unknown parameter into an appropriate parameter or to a section of the article's talk page for preservation. Pages with this error are automatically placed in <a href="/wiki/Categori:Pages_with_citations_using_unsupported_parameters" title="Categori:Pages with citations using unsupported parameters">Category:Pages with citations using unsupported parameters</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Wikilink_embedded_in_URL_title" data-mw-thread-id="h-Wikilink_embedded_in_URL_title">Wikilink embedded in URL title</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=37" title="Golygu'r adran: Wikilink embedded in URL title" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=37" title="Edit section's source code: Wikilink embedded in URL title">golygu cod</a>]</div> <a href="/w/index.php?title=Nodyn:Help_desk&action=edit&redlink=1" class="new" title="Nodyn:Help desk (dim tudalen ar gael)">Nodyn:Help desk</a>Wikilink embedded in URL title External links in a rendered citation are a combination of url-holding parameters, <code>|url=</code>, <code>|chapter-url=</code>, etc., with title-holding parameters, <code>|title=</code>, <code>|chapter=</code>, etc. Title-holding parameters may be <a href="/w/index.php?title=Wikilink&action=edit&redlink=1" class="new" title="Wikilink (dim tudalen ar gael)">wikilinked</a> to another Wikipedia article but not when there is a matching url-holding parameter in the citation. When this condition occurs, the wikilink is suppressed, the wiki markup ignored, and the rendered citation links to the external site. Some <a href="/w/index.php?title=Cymorth:Template&action=edit&redlink=1" class="new" title="Cymorth:Template (dim tudalen ar gael)">templates</a> will also cause this error if they are part of a title-holding parameter. The error occurs when the template produces wikilinked content. For example, <code>{{<a href="/wiki/Nodyn:Lang" title="Nodyn:Lang">lang</a>}}</code> templates output a wikilinked category. Templates in url-holding parameters may also corrupt the citation's <a href="/w/index.php?title=Wicipedia:COinS&action=edit&redlink=1" class="new" title="Wicipedia:COinS (dim tudalen ar gael)">COinS</a> metadata. As a general rule, avoid using templates in title-holding parameters unless you know that the template's affects are entirely visual (<code>{{<a href="/wiki/Nodyn:!" title="Nodyn:!">!</a>}}</code> and the like). This type of error may also occur in identifier-based templates (<code>{{<a href="/wiki/Nodyn:Cite_doi" title="Nodyn:Cite doi">cite doi</a>}}</code>, etc.). When this happens, the error message is shown in the article but the error is actually located in the identifier-based citation template. To resolve this error, remove wikilinks from title-holding parameters that are intended to be externally linked or remove the external URL, which will allow the internal wikilinks to work as expected. If wikilink-producing templates are important to the citation, move them out of the CS1 template but leave them inside the citation's <code style="white-space:nowrap;"><ref>...</ref></code> tags. Some of the functionality provided by templates may also be available through CS1 parameters. To resolve errors in identifier-based citation templates, the template must be edited to correct the error. Exercise caution when editing these templates because identifier-based citation templates are often used in multiple articles. Pages with this error are automatically placed in <a href="/w/index.php?title=Categori:Pages_with_citations_having_wikilinks_embedded_in_URL_titles&action=edit&redlink=1" class="new" title="Categori:Pages with citations having wikilinks embedded in URL titles (dim tudalen ar gael)">Category:Pages with citations having wikilinks embedded in URL titles</a>.<a href="#cite_note-categories-1">[a]</a> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Notes" data-mw-thread-id="h-Notes">Notes</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=38" title="Golygu'r adran: Notes" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=38" title="Edit section's source code: Notes">golygu cod</a>]</div> <div class="reflist" style="list-style-type: lower-alpha;"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-categories-1">↑ <a href="#cite_ref-categories_1-0">1.00</a> <a href="#cite_ref-categories_1-1">1.01</a> <a href="#cite_ref-categories_1-2">1.02</a> <a href="#cite_ref-categories_1-3">1.03</a> <a href="#cite_ref-categories_1-4">1.04</a> <a href="#cite_ref-categories_1-5">1.05</a> <a href="#cite_ref-categories_1-6">1.06</a> <a href="#cite_ref-categories_1-7">1.07</a> <a href="#cite_ref-categories_1-8">1.08</a> <a href="#cite_ref-categories_1-9">1.09</a> <a href="#cite_ref-categories_1-10">1.10</a> <a href="#cite_ref-categories_1-11">1.11</a> <a href="#cite_ref-categories_1-12">1.12</a> <a href="#cite_ref-categories_1-13">1.13</a> <a href="#cite_ref-categories_1-14">1.14</a> <a href="#cite_ref-categories_1-15">1.15</a> <a href="#cite_ref-categories_1-16">1.16</a> <a href="#cite_ref-categories_1-17">1.17</a> <a href="#cite_ref-categories_1-18">1.18</a> <a href="#cite_ref-categories_1-19">1.19</a> <a href="#cite_ref-categories_1-20">1.20</a> <a href="#cite_ref-categories_1-21">1.21</a> <a href="#cite_ref-categories_1-22">1.22</a> <a href="#cite_ref-categories_1-23">1.23</a> <a href="#cite_ref-categories_1-24">1.24</a> <a href="#cite_ref-categories_1-25">1.25</a> <a href="#cite_ref-categories_1-26">1.26</a> <a href="#cite_ref-categories_1-27">1.27</a> <a href="#cite_ref-categories_1-28">1.28</a> <a href="#cite_ref-categories_1-29">1.29</a> <a href="#cite_ref-categories_1-30">1.30</a> <a href="#cite_ref-categories_1-31">1.31</a> <a href="#cite_ref-categories_1-32">1.32</a> <a href="#cite_ref-categories_1-33">1.33</a> <a href="#cite_ref-categories_1-34">1.34</a> Pages in the Book talk, Category talk, Draft, Draft talk, Education Program talk, File talk, Help talk, MediaWiki talk, Module talk, Portal talk, Talk, Template talk, TimedText talk, User, User talk, and Wikipedia talk namespaces are not included in the error tracking categories. </li> </ol></div></div> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="References" data-mw-thread-id="h-References">References</h2>[<a href="/w/index.php?title=Cymorth:CS1_errors&veaction=edit&section=39" title="Golygu'r adran: References" class="mw-editsection-visualeditor">golygu</a> | <a href="/w/index.php?title=Cymorth:CS1_errors&action=edit&section=39" title="Edit section's source code: References">golygu cod</a>]</div> <div class="reflist" style="list-style-type: decimal;"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-archive.org-2">↑ <a href="#cite_ref-archive.org_2-0">1.0</a> <a href="#cite_ref-archive.org_2-1">1.1</a> <cite class="citation web"><a rel="nofollow" class="external text" href="http://www.archive.org">"archive.org website"</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=archive.org+website&rft_id=http%3A%2F%2Fwww.archive.org&rfr_id=info%3Asid%2Fcy.wikipedia.org%3ACymorth%3ACS1+errors" class="Z3988"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"> </li> <li id="cite_note-webcitation.org-3">↑ <a href="#cite_ref-webcitation.org_3-0">2.0</a> <a href="#cite_ref-webcitation.org_3-1">2.1</a> <cite class="citation web"><a rel="nofollow" class="external text" href="http://www.webcitation.org">"webcitation.org website"</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=webcitation.org+website&rft_id=http%3A%2F%2Fwww.webcitation.org&rfr_id=info%3Asid%2Fcy.wikipedia.org%3ACymorth%3ACS1+errors" class="Z3988"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"> </li> <li id="cite_note-4"><a href="#cite_ref-4">↑</a> <cite class="citation web"><a rel="nofollow" class="external text" href="http://arxiv.org/help/arxiv_identifier">"Understanding the arXiv identifier"</a>. <a href="/w/index.php?title=Cornell_University_Library&action=edit&redlink=1" class="new" title="Cornell University Library (dim tudalen ar gael)">Cornell University Library</a>. Cyrchwyd 2014-08-20.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Cornell+University+Library&rft.atitle=Understanding+the+arXiv+identifier&rft_id=http%3A%2F%2Farxiv.org%2Fhelp%2Farxiv_identifier&rfr_id=info%3Asid%2Fcy.wikipedia.org%3ACymorth%3ACS1+errors" class="Z3988"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"> </li> <li id="cite_note-5"><a href="#cite_ref-5">↑</a> <cite class="citation web"><a rel="nofollow" class="external text" href="http://www.loc.gov/marc/lccn-namespace.html#syntax">"The LCCN Namespace"</a>. Network Development and MARC Standards Office. <a href="/wiki/Library_of_Congress" class="mw-redirect" title="Library of Congress">Library of Congress</a>. November 2003.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Network+Development+and+MARC+Standards+Office&rft.atitle=The+LCCN+Namespace&rft.date=2003-11&rft_id=http%3A%2F%2Fwww.loc.gov%2Fmarc%2Flccn-namespace.html%23syntax&rfr_id=info%3Asid%2Fcy.wikipedia.org%3ACymorth%3ACS1+errors" class="Z3988"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"> </li> <li id="cite_note-6"><a href="#cite_ref-6">↑</a> <cite class="citation web"><a rel="nofollow" class="external text" href="//tools.ietf.org/html/rfc5536">"Netnews Article Format"</a>. <a href="/w/index.php?title=Internet_Engineering_Task_Force&action=edit&redlink=1" class="new" title="Internet Engineering Task Force (dim tudalen ar gael)">Internet Engineering Task Force</a>. November 2009. <a rel="nofollow" class="external text" href="//tools.ietf.org/html/rfc5536#section-3.1.3">3.1.3</a>. rfc5536.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Internet+Engineering+Task+Force&rft.atitle=Netnews+Article+Format&rft.pages=3.1.3&rft.date=2009-11&rft_id=%2F%2Ftools.ietf.org%2Fhtml%2Frfc5536&rfr_id=info%3Asid%2Fcy.wikipedia.org%3ACymorth%3ACS1+errors" class="Z3988"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"> </li> </ol></div></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=1x1&usesul3=0" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Wedi dod o "<a dir="ltr" href="https://cy.wikipedia.org/w/index.php?title=Cymorth:CS1_errors&oldid=10958862">https://cy.wikipedia.org/w/index.php?title=Cymorth:CS1_errors&oldid=10958862</a>"</div></div> <div id="catlinks" class="catlinks catlinks-allhidden" data-mw="interface"><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Chategori cudd: <ul><li><a href="/wiki/Categori:CS1_maint:_date_format" title="Categori:CS1 maint: date format">CS1 maint: date format</a></li><li><a href="/wiki/Categori:CS1_errors:_dates" title="Categori:CS1 errors: dates">CS1 errors: dates</a></li><li><a href="/wiki/Categori:CS1:_Julian%E2%80%93Gregorian_uncertainty" title="Categori:CS1: Julian–Gregorian uncertainty">CS1: Julian–Gregorian uncertainty</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> Golygwyd y dudalen hon ddiwethaf ar 30 Gorffennaf 2021, am 21:38.</li> <li id="footer-info-copyright">Mae'r testun ar gael o dan <a rel="nofollow" class="external text" href="https://creativecommons.org/licenses/by-sa/4.0/deed.en">Creative Commons Attribution-ShareAlike License</a>; gall telerau ychwanegol fod yn berthnasol. 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