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width, and color" > <input type="checkbox" id="vector-appearance-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-appearance-dropdown" class="vector-dropdown-checkbox " aria-label="Appearance" > <label id="vector-appearance-dropdown-label" for="vector-appearance-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" ><span class="vector-icon mw-ui-icon-appearance mw-ui-icon-wikimedia-appearance"></span> <span class="vector-dropdown-label-text">Appearance</span> </label> <div class="vector-dropdown-content"> <div id="vector-appearance-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <div id="p-vector-user-menu-notifications" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-overflow" class="vector-menu mw-portlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="https://donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_en.wikipedia.org&uselang=en" class=""><span>Donate</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Special:CreateAccount&returnto=OPML" title="You are encouraged to create an account and log in; however, it is not mandatory" class=""><span>Create account</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Special:UserLogin&returnto=OPML" title="You're encouraged to log in; 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[o]" accesskey="o" class=""><span>Log in</span></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="Log in and more options" > <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="Personal tools" > <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" ><span class="vector-icon mw-ui-icon-ellipsis mw-ui-icon-wikimedia-ellipsis"></span> <span class="vector-dropdown-label-text">Personal tools</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="User menu" > <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/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_en.wikipedia.org&uselang=en"><span>Donate</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Special:CreateAccount&returnto=OPML" title="You are encouraged to create an account and log in; however, it is not mandatory"><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>Create account</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Special:UserLogin&returnto=OPML" title="You're encouraged to log in; however, it's not mandatory. [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Log in</span></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"> Pages for logged out editors <a href="/wiki/Help:Introduction" aria-label="Learn more about editing"><span>learn more</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Special:MyContributions" title="A list of edits made from this IP address [y]" accesskey="y"><span>Contributions</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Special:MyTalk" title="Discussion about edits from this IP address [n]" accesskey="n"><span>Talk</span></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="Site"> <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="Contents" 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">Contents</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">hide</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">(Top)</div> </a> </li> <li id="toc-XML_format" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#XML_format"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>XML format</span> </div> </a> <ul id="toc-XML_format-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Criticism" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Criticism"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Criticism</span> </div> </a> <ul id="toc-Criticism-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Validation" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Validation"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Validation</span> </div> </a> <ul id="toc-Validation-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Alternative_specifications" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Alternative_specifications"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Alternative specifications</span> </div> </a> <ul id="toc-Alternative_specifications-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>External links</span> </div> </a> <ul id="toc-External_links-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="Contents" 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="Toggle the table of contents" > <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" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toggle the table of contents</span> </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"><span class="mw-page-title-main">OPML</span></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="Go to an article in another language. Available in 19 languages" > <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-19" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">19 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%A3%D9%88_%D8%A8%D9%8A_%D8%A5%D9%85_%D8%A5%D9%84" title="أو بي إم إل – Arabic" lang="ar" hreflang="ar" data-title="أو بي إم إل" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Outline_Processor_Markup_Language" title="Outline Processor Markup Language – Catalan" lang="ca" hreflang="ca" data-title="Outline Processor Markup Language" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Outline_Processor_Markup_Language" title="Outline Processor Markup Language – German" lang="de" hreflang="de" data-title="Outline Processor Markup Language" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/OPML" title="OPML – Spanish" lang="es" hreflang="es" data-title="OPML" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%A7%D9%88%D9%BE%DB%8C%E2%80%8C%D8%A7%D9%85%E2%80%8C%D8%A7%D9%84" title="اوپی‌ام‌ال – Persian" lang="fa" hreflang="fa" data-title="اوپی‌ام‌ال" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Outline_Processor_Markup_Language" title="Outline Processor Markup Language – French" lang="fr" hreflang="fr" data-title="Outline Processor Markup Language" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/OPML" title="OPML – Galician" lang="gl" hreflang="gl" data-title="OPML" data-language-autonym="Galego" data-language-local-name="Galician" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/OPML" title="OPML – Korean" lang="ko" hreflang="ko" data-title="OPML" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/OPML" title="OPML – Indonesian" lang="id" hreflang="id" data-title="OPML" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/OPML" title="OPML – Italian" lang="it" hreflang="it" data-title="OPML" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ku mw-list-item"><a href="https://ku.wikipedia.org/wiki/OPML" title="OPML – Kurdish" lang="ku" hreflang="ku" data-title="OPML" data-language-autonym="Kurdî" data-language-local-name="Kurdish" class="interlanguage-link-target"><span>Kurdî</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/OPML" title="OPML – Latvian" lang="lv" hreflang="lv" data-title="OPML" data-language-autonym="Latviešu" data-language-local-name="Latvian" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/OPML" title="OPML – Hungarian" lang="hu" hreflang="hu" data-title="OPML" data-language-autonym="Magyar" data-language-local-name="Hungarian" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/Outline_Processor_Markup_Language" title="Outline Processor Markup Language – Japanese" lang="ja" hreflang="ja" data-title="Outline Processor Markup Language" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/OPML" title="OPML – Polish" lang="pl" hreflang="pl" data-title="OPML" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/OPML" title="OPML – Portuguese" lang="pt" hreflang="pt" data-title="OPML" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/OPML" title="OPML – Russian" lang="ru" hreflang="ru" data-title="OPML" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/OPML" title="OPML – Turkish" lang="tr" hreflang="tr" data-title="OPML" data-language-autonym="Türkçe" data-language-local-name="Turkish" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/OPML" title="OPML – Chinese" lang="zh" hreflang="zh" data-title="OPML" data-language-autonym="中文" data-language-local-name="Chinese" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q836370#sitelinks-wikipedia" title="Edit interlanguage links" class="wbc-editpage">Edit links</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namespaces"> <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-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/OPML" title="View the content page [c]" accesskey="c"><span>Article</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/Talk:OPML" rel="discussion" title="Discuss improvements to the content page [t]" accesskey="t"><span>Talk</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" 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class="selected vector-tab-noicon mw-list-item"><a href="/wiki/OPML"><span>Read</span></a></li><li id="ca-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=OPML&action=edit" title="Edit this page [e]" accesskey="e"><span>Edit</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=OPML&action=history" title="Past revisions of this page [h]" accesskey="h"><span>View history</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Tools" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Tools</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" 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">Tools</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" 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class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Special:WhatLinksHere/OPML" title="List of all English Wikipedia pages containing links to this page [j]" accesskey="j"><span>What links here</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Special:RecentChangesLinked/OPML" rel="nofollow" title="Recent changes in pages linked from this page [k]" accesskey="k"><span>Related changes</span></a></li><li id="t-upload" class="mw-list-item"><a href="/wiki/Wikipedia:File_Upload_Wizard" title="Upload files [u]" accesskey="u"><span>Upload file</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Special:SpecialPages" title="A list of all special pages [q]" accesskey="q"><span>Special pages</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=OPML&oldid=1224270578" title="Permanent link to this revision of this page"><span>Permanent link</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=OPML&action=info" title="More information about this page"><span>Page information</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Special:CiteThisPage&page=OPML&id=1224270578&wpFormIdentifier=titleform" title="Information on how to cite this page"><span>Cite this page</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Special:UrlShortener&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FOPML"><span>Get shortened URL</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Special:QrCode&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FOPML"><span>Download QR code</span></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"> Print/export </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Special:DownloadAsPdf&page=OPML&action=show-download-screen" title="Download this page as a PDF file"><span>Download as PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=OPML&printable=yes" title="Printable version of this page [p]" accesskey="p"><span>Printable version</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> In other projects </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Category:OPML" hreflang="en"><span>Wikimedia Commons</span></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/Q836370" title="Structured data on this page hosted by Wikidata [g]" accesskey="g"><span>Wikidata item</span></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="Page tools"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Appearance"> <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">Appearance</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">hide</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">From Wikipedia, the free encyclopedia</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="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">XML format for outlines</div> <style data-mw-deduplicate="TemplateStyles:r1251242444">.mw-parser-output .ambox{border:1px solid #a2a9b1;border-left:10px solid #36c;background-color:#fbfbfb;box-sizing:border-box}.mw-parser-output .ambox+link+.ambox,.mw-parser-output .ambox+link+style+.ambox,.mw-parser-output .ambox+link+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+style+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+link+.ambox{margin-top:-1px}html body.mediawiki .mw-parser-output .ambox.mbox-small-left{margin:4px 1em 4px 0;overflow:hidden;width:238px;border-collapse:collapse;font-size:88%;line-height:1.25em}.mw-parser-output .ambox-speedy{border-left:10px solid #b32424;background-color:#fee7e6}.mw-parser-output .ambox-delete{border-left:10px solid #b32424}.mw-parser-output .ambox-content{border-left:10px solid #f28500}.mw-parser-output .ambox-style{border-left:10px solid #fc3}.mw-parser-output .ambox-move{border-left:10px solid #9932cc}.mw-parser-output .ambox-protection{border-left:10px solid #a2a9b1}.mw-parser-output .ambox .mbox-text{border:none;padding:0.25em 0.5em;width:100%}.mw-parser-output .ambox .mbox-image{border:none;padding:2px 0 2px 0.5em;text-align:center}.mw-parser-output .ambox .mbox-imageright{border:none;padding:2px 0.5em 2px 0;text-align:center}.mw-parser-output .ambox .mbox-empty-cell{border:none;padding:0;width:1px}.mw-parser-output .ambox .mbox-image-div{width:52px}@media(min-width:720px){.mw-parser-output .ambox{margin:0 10%}}@media print{body.ns-0 .mw-parser-output .ambox{display:none!important}}</style><table class="box-One_source plainlinks metadata ambox ambox-content ambox-one_source" role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span typeof="mw:File"><a href="/wiki/File:Question_book-new.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/50px-Question_book-new.svg.png" decoding="async" width="50" height="39" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/75px-Question_book-new.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/100px-Question_book-new.svg.png 2x" data-file-width="512" data-file-height="399" /></a></span></div></td><td class="mbox-text"><div class="mbox-text-span">This article <b>relies largely or entirely on a <a href="/wiki/Wikipedia:Articles_with_a_single_source" title="Wikipedia:Articles with a single source">single source</a></b>.<span class="hide-when-compact"> Relevant discussion may be found on the <a href="/wiki/Talk:OPML##" title="Talk:OPML">talk page</a>. Please help <a class="external text" href="https://en.wikipedia.org/w/index.php?title=OPML&action=edit">improve this article</a> by <a href="/wiki/Help:Referencing_for_beginners" title="Help:Referencing for beginners">introducing citations to additional sources</a>.<br /><small><span class="plainlinks"><i>Find sources:</i> <a rel="nofollow" class="external text" href="https://www.google.com/search?as_eq=wikipedia&q=%22OPML%22">"OPML"</a> – <a rel="nofollow" class="external text" href="https://www.google.com/search?tbm=nws&q=%22OPML%22+-wikipedia&tbs=ar:1">news</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?&q=%22OPML%22&tbs=bkt:s&tbm=bks">newspapers</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?tbs=bks:1&q=%22OPML%22+-wikipedia">books</a> <b>·</b> <a rel="nofollow" class="external text" href="https://scholar.google.com/scholar?q=%22OPML%22">scholar</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.jstor.org/action/doBasicSearch?Query=%22OPML%22&acc=on&wc=on">JSTOR</a></span></small></span> <span class="date-container"><i>(<span class="date">May 2017</span>)</i></span></div></td></tr></tbody></table> <p class="mw-empty-elt"> </p> <style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox"><caption class="infobox-title" style="padding-bottom:0.15em;">OPML</caption><tbody><tr><td colspan="2" class="infobox-image"><span typeof="mw:File"><a href="/wiki/File:Opml-icon.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/2c/Opml-icon.svg/100px-Opml-icon.svg.png" decoding="async" width="100" height="100" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/2c/Opml-icon.svg/150px-Opml-icon.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/2c/Opml-icon.svg/200px-Opml-icon.svg.png 2x" data-file-width="128" data-file-height="128" /></a></span></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em; padding-right:0.65em;"><a href="/wiki/Filename_extension" title="Filename extension">Filename extension</a></th><td class="infobox-data" style="line-height:1.35em;"><style data-mw-deduplicate="TemplateStyles:r886049734">.mw-parser-output .monospaced{font-family:monospace,monospace}</style><div class="monospaced"> <code>.opml</code></div></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em; padding-right:0.65em;"><a href="/wiki/Media_type" title="Media type">Internet media type</a></th><td class="infobox-data" style="line-height:1.35em;"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886049734"><div class="monospaced"> application/xml, text/xml, text/x-opml</div></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em; padding-right:0.65em;"><a href="/wiki/Uniform_Type_Identifier" title="Uniform Type Identifier">Uniform Type Identifier (UTI)</a></th><td class="infobox-data" style="line-height:1.35em;">org.opml.opml</td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em; padding-right:0.65em;">UTI conformation</th><td class="infobox-data" style="line-height:1.35em;">public.xml</td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em; padding-right:0.65em;">Developed by</th><td class="infobox-data" style="line-height:1.35em;"><a href="/wiki/UserLand_Software" title="UserLand Software">UserLand</a></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em; padding-right:0.65em;">Type of format</th><td class="infobox-data" style="line-height:1.35em;"><a href="/wiki/Outliner" title="Outliner">Outliner</a></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em; padding-right:0.65em;">Extended from</th><td class="infobox-data" style="line-height:1.35em;"><a href="/wiki/XML" title="XML">XML</a></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em; padding-right:0.65em;">Website</th><td class="infobox-data" style="line-height:1.35em;"><span class="url"><a rel="nofollow" class="external text" href="http://dev.opml.org/">dev<wbr />.opml<wbr />.org</a></span></td></tr></tbody></table> <p><b>OPML</b> (<b>Outline Processor Markup Language</b>) is an <a href="/wiki/XML" title="XML">XML</a> format for <a href="/wiki/Outline_(list)" title="Outline (list)">outlines</a> (defined as "a tree, where each node contains a set of named attributes with string values"<sup id="cite_ref-Spec_1-0" class="reference"><a href="#cite_note-Spec-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup>). Originally developed by <a href="/wiki/UserLand_Software" title="UserLand Software">UserLand Software</a> as a native file format for the <a href="/wiki/Outliner" title="Outliner">outliner</a> application in its <a href="/wiki/Radio_UserLand" title="Radio UserLand">Radio UserLand</a> product, it has since been adopted for other uses, the most common being to exchange lists of <a href="/wiki/Web_feeds" class="mw-redirect" title="Web feeds">web feeds</a> between web <a href="/wiki/Feed_aggregator" class="mw-redirect" title="Feed aggregator">feed aggregators</a>.<sup id="cite_ref-lifewire_2-0" class="reference"><a href="#cite_note-lifewire-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p><p>The OPML specification defines an outline as a hierarchical, ordered list of arbitrary elements. The specification is fairly open which makes it suitable for many types of list data. </p><p>Support for importing and exporting <a href="/wiki/RSS" title="RSS">RSS</a> feed lists in OPML format is available in <a href="/wiki/Mozilla_Thunderbird" title="Mozilla Thunderbird">Mozilla Thunderbird</a><sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> and in most other RSS reader web sites and applications.<sup id="cite_ref-lifewire_2-1" class="reference"><a href="#cite_note-lifewire-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="XML_format">XML format</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=OPML&action=edit&section=1" title="Edit section: XML format"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The XML elements in an OPML document are: </p> <dl><dt><code><opml version="1.0"></code></dt> <dd>This is the root element. It must contain the version attribute and one <i>head</i> and one <i>body</i> element.</dd></dl> <dl><dt><code><head></code></dt> <dd>Contains <a href="/wiki/Metadata_(computing)" class="mw-redirect" title="Metadata (computing)">metadata</a>. May include any of these optional elements: <i>title</i>, <i>dateCreated</i>, <i>dateModified</i>, <i>ownerName</i>, <i>ownerEmail</i>, <i>expansionState</i>, <i> vertScrollState</i>, <i>windowTop</i>, <i>windowLeft</i>, <i>windowBottom</i>, <i>windowRight</i>. Each element is a simple text element. <i>dateCreated</i> and <i>dateModified</i> contents conform to the date-time format specified in <style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><a href="/wiki/RFC_(identifier)" class="mw-redirect" title="RFC (identifier)">RFC</a> <a rel="nofollow" class="external text" href="https://datatracker.ietf.org/doc/html/rfc822">822</a>. <i>expansionState</i> contains a comma-separated list of line numbers that should be expanded on display. The <i>windowXXX</i> elements define the position and size of the display window. An OPML processor may ignore all the <i>head</i> sub-elements. If the outline is opened inside another outline then the processor must ignore the window elements.</dd></dl> <dl><dt><code><body></code></dt> <dd>Contains the content of the outline. Must have at least one <i>outline</i> element.</dd></dl> <dl><dt><code><outline></code></dt> <dd>Represents a line in the outline. May contain any number of arbitrary attributes. Common attributes include <i>text</i> and <i>type</i>. The outline element may contain any number of <i>outline</i> sub-elements.</dd></dl> <div class="mw-heading mw-heading2"><h2 id="Criticism">Criticism</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=OPML&action=edit&section=2" title="Edit section: Criticism"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1251242444"><table class="box-More_citations_needed plainlinks metadata ambox ambox-content ambox-Refimprove" role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span typeof="mw:File"><a href="/wiki/File:Question_book-new.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/50px-Question_book-new.svg.png" decoding="async" width="50" height="39" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/75px-Question_book-new.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/100px-Question_book-new.svg.png 2x" data-file-width="512" data-file-height="399" /></a></span></div></td><td class="mbox-text"><div class="mbox-text-span">This article <b>needs additional citations for <a href="/wiki/Wikipedia:Verifiability" title="Wikipedia:Verifiability">verification</a></b>.<span class="hide-when-compact"> Please help <a href="/wiki/Special:EditPage/OPML" title="Special:EditPage/OPML">improve this article</a> by <a href="/wiki/Help:Referencing_for_beginners" title="Help:Referencing for beginners">adding citations to reliable sources</a>. Unsourced material may be challenged and removed.<br /><small><span class="plainlinks"><i>Find sources:</i> <a rel="nofollow" class="external text" href="https://www.google.com/search?as_eq=wikipedia&q=%22OPML%22">"OPML"</a> – <a rel="nofollow" class="external text" href="https://www.google.com/search?tbm=nws&q=%22OPML%22+-wikipedia&tbs=ar:1">news</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?&q=%22OPML%22&tbs=bkt:s&tbm=bks">newspapers</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?tbs=bks:1&q=%22OPML%22+-wikipedia">books</a> <b>·</b> <a rel="nofollow" class="external text" href="https://scholar.google.com/scholar?q=%22OPML%22">scholar</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.jstor.org/action/doBasicSearch?Query=%22OPML%22&acc=on&wc=on">JSTOR</a></span></small></span> <span class="date-container"><i>(<span class="date">December 2013</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <ol><li>The <a href="/wiki/RFC_822" class="mw-redirect" title="RFC 822">RFC 822</a> date format is considered obsolete, and amongst other things permits the representation of years as two digits. (RFC 822 has been superseded by <a href="/wiki/RFC_2822" class="mw-redirect" title="RFC 2822">RFC 2822</a> then <a href="/wiki/RFC_5322" class="mw-redirect" title="RFC 5322">RFC 5322</a>.) In general, date and time formats should be represented according to <a href="/wiki/RFC_3339" class="mw-redirect" title="RFC 3339">RFC 3339</a>.</li> <li>Due to the semantics of the "expansionState" attribute: <ul><li>The expansion state of the children of collapsed nodes cannot be stored</li> <li>When an outline element is expanded, collapsed, added, deleted or moved, the expansion state of all elements below it must be recalculated</li></ul></li> <li>Due to the arbitrary nature of the "type" attribute, and the acceptance of arbitrary attributes on "outline" elements, interoperability of OPML documents relies almost entirely on the undocumented conventions of content producers.</li> <li>MIME types aren't clear; text/xml usually merely identifies the document as having XML content, while text/x-opml does not specify that the document is XML since it lacks the <a href="/wiki/%2Bxml" class="mw-redirect" title="+xml">+xml</a> suffix.</li></ol> <p><sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Validation">Validation</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=OPML&action=edit&section=3" title="Edit section: Validation"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/Dave_Winer" title="Dave Winer">Dave Winer</a>, the founder and CEO of Userland, has made a request for comments on a <a rel="nofollow" class="external text" href="https://web.archive.org/web/20051024010033/http://www.opml.org/guidelinesForValidation">proposal for validating OPML</a> and released a beta <a rel="nofollow" class="external text" href="https://web.archive.org/web/20051102000206/http://validator.opml.org/">OPML validator</a>. </p><p>Katy Ginger<sup class="noprint Inline-Template" style="margin-left:0.1em; white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Please_clarify" title="Wikipedia:Please clarify"><span title="The text near this tag may need clarification or removal of jargon. (December 2016)">clarification needed</span></a></i>]</sup> from DLESE<sup class="noprint Inline-Template" style="margin-left:0.1em; white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Please_clarify" title="Wikipedia:Please clarify"><span title="The text near this tag may need clarification or removal of jargon. (December 2016)">clarification needed</span></a></i>]</sup> has published <a rel="nofollow" class="external text" href="https://web.archive.org/web/20070910025930/http://www.dlese.org/Metadata/opml/2.0/index.htm">an XML Schema Document</a> for validating OPML 2.0. There is also a <a rel="nofollow" class="external text" href="http://static.userland.com/gems/radiodiscuss/opmlDtd.txt">DTD available for OPML 1.0</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Alternative_specifications">Alternative specifications</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=OPML&action=edit&section=4" title="Edit section: Alternative specifications"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/List_of_content_syndication_markup_languages" title="List of content syndication markup languages">List of content syndication markup languages</a></div> <p>Alternative specifications have been proposed, notably these include <a href="/wiki/OML_(computer_format)" class="mw-redirect" title="OML (computer format)">OML</a>, <a href="/wiki/XOXO_(microformat)" title="XOXO (microformat)">XOXO</a> and <a href="/wiki/XBEL" title="XBEL">XBEL</a>. </p> <ul><li><a href="/wiki/OML_(computer_format)" class="mw-redirect" title="OML (computer format)">OML</a> – Outline Markup Language</li> <li><a href="/wiki/XOXO_(microformat)" title="XOXO (microformat)">XOXO</a> – Extensible Open XHTML Outlines</li> <li><a href="/wiki/XBEL" title="XBEL">XBEL</a> – XML Bookmark Exchange Language</li></ul> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=OPML&action=edit&section=5" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Data_portability" title="Data portability">Data portability</a></li> <li><a href="/wiki/Attention_Profiling_Mark-up_Language" title="Attention Profiling Mark-up Language">APML</a> – Attention Profiling Mark-up Language</li> <li><a href="/wiki/Feed_icon" class="mw-redirect" title="Feed icon">Feed icon</a></li> <li><a href="/wiki/Share_icon" title="Share icon">Share icon</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=OPML&action=edit&section=6" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-Spec-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-Spec_1-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://dev.opml.org/spec2.html">"OPML 2.0 Specification"</a><span class="reference-accessdate">. Retrieved <span class="nowrap">18 March</span> 2014</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=OPML+2.0+Specification&rft_id=http%3A%2F%2Fdev.opml.org%2Fspec2.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOPML" class="Z3988"></span></span> </li> <li id="cite_note-lifewire-2"><span class="mw-cite-backlink">^ <a href="#cite_ref-lifewire_2-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-lifewire_2-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFFisher2022" class="citation web cs1">Fisher, Tim (12 March 2022). <a rel="nofollow" class="external text" href="https://www.lifewire.com/opml-file-2622105">"How to Open, Edit, and Convert OPML Files"</a>. <i><a href="/wiki/Lifewire" title="Lifewire">Lifewire</a></i><span class="reference-accessdate">. Retrieved <span class="nowrap">5 July</span> 2023</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Lifewire&rft.atitle=How+to+Open%2C+Edit%2C+and+Convert+OPML+Files&rft.date=2022-03-12&rft.aulast=Fisher&rft.aufirst=Tim&rft_id=https%3A%2F%2Fwww.lifewire.com%2Fopml-file-2622105&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOPML" class="Z3988"></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://support.mozilla.org/en-US/kb/how-subscribe-news-feeds-and-blogs">"How to Subscribe to News Feeds and Blogs | Thunderbird Help"</a>. <i>support.mozilla.org</i><span class="reference-accessdate">. Retrieved <span class="nowrap">11 June</span> 2019</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=support.mozilla.org&rft.atitle=How+to+Subscribe+to+News+Feeds+and+Blogs+%7C+Thunderbird+Help&rft_id=https%3A%2F%2Fsupport.mozilla.org%2Fen-US%2Fkb%2Fhow-subscribe-news-feeds-and-blogs&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOPML" class="Z3988"></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="a" class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.rfc-editor.org/rfc/rfc5322">"RFC 5322"</a>. <i>RFC editor</i><span class="reference-accessdate">. Retrieved <span class="nowrap">21 September</span> 2023</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=RFC+editor&rft.atitle=RFC+5322&rft_id=https%3A%2F%2Fwww.rfc-editor.org%2Frfc%2Frfc5322&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOPML" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=OPML&action=edit&section=7" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20160304125338/http://dev.opml.org/spec1.html">OPML 1.0 Specification</a> at the <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a> (archived 2016-03-04)</li> <li><a rel="nofollow" class="external text" href="http://dev.opml.org/spec2.html">OPML 2.0 Specification</a></li> <li><a rel="nofollow" class="external text" href="http://home.opml.org/">OPML Editor app</a></li> <li><a rel="nofollow" class="external text" href="http://www.opmlicons.com/">OPML Icon Files</a></li> <li><a rel="nofollow" class="external text" href="http://codebeautify.org/opmlviewer">OPML Viewer-Editor</a></li> <li><a rel="nofollow" class="external text" href="http://www.whiterocksoftware.com/2020/07/opml-file-viewer.html">OPML Viewer</a></li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl 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.navbox-image img{max-width:none!important}@media print{body.ns-0 .mw-parser-output .navbox{display:none!important}}</style></div><div role="navigation" class="navbox" aria-labelledby="Web_syndication" style="padding:3px"><table class="nowraplinks hlist mw-collapsible mw-collapsed navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Web_syndication" title="Template:Web syndication"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Web_syndication" title="Template talk:Web syndication"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Web_syndication" title="Special:EditPage/Template:Web syndication"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Web_syndication" style="font-size:114%;margin:0 4em"><a href="/wiki/Web_syndication" title="Web syndication">Web syndication</a></div></th></tr><tr><td class="navbox-abovebelow" colspan="2"><div> <dl><dt>History</dt> <dd><a href="/wiki/History_of_blogging" title="History of blogging">Blogging</a></dd> <dd><a href="/wiki/History_of_podcasting" title="History of podcasting">Podcasting</a></dd> <dd><a href="/wiki/Vlog#History" title="Vlog">Vlogging</a></dd> <dd><a href="/wiki/History_of_web_syndication_technology" title="History of web syndication technology">Web syndication technology</a></dd></dl> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Niche_blogging" title="Niche blogging">Types</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Art_blog" title="Art blog">Art</a></li> <li><a href="/wiki/Mormon_blogosphere" title="Mormon blogosphere">Bloggernacle</a></li> <li><a href="/wiki/Classical_music_blog" title="Classical music blog">Classical music</a></li> <li><a href="/wiki/Corporate_blog" title="Corporate blog">Corporate</a></li> <li><a href="/wiki/Dream_diary" title="Dream diary">Dream diary</a></li> <li><a href="/wiki/Edublog" title="Edublog">Edublog</a></li> <li><a href="/wiki/Electronic_journal" class="mw-redirect" title="Electronic journal">Electronic journal</a></li> <li><a href="/wiki/Astroturfing" title="Astroturfing">Fake</a></li> <li><a href="/wiki/List_of_family-and-homemaking_blogs" title="List of family-and-homemaking blogs">Family</a></li> <li><a href="/wiki/Fashion_blog" title="Fashion blog">Fashion</a></li> <li><a href="/wiki/Food_blogging" title="Food blogging">Food</a></li> <li><a href="/wiki/Health_blog" title="Health blog">Health</a></li> <li><a href="/wiki/Blawg" class="mw-redirect" title="Blawg">Law</a></li> <li><a href="/wiki/Lifelog" title="Lifelog">Lifelog</a></li> <li><a href="/wiki/MP3_blog" title="MP3 blog">MP3</a></li> <li><a href="/wiki/Citizen_journalism" title="Citizen journalism">News</a></li> <li><a href="/wiki/Photoblog" title="Photoblog">Photoblog</a></li> <li><a href="/wiki/Police_blog" title="Police blog">Police</a></li> <li><a href="/wiki/Blog#Political_impact" title="Blog">Political</a></li> <li><a href="/wiki/Project_diary" title="Project diary">Project</a></li> <li><a href="/wiki/Reverse_blog" title="Reverse blog">Reverse</a></li> <li><a href="/wiki/Travel_blog" class="mw-redirect" title="Travel blog">Travel</a></li> <li><a href="/wiki/Warblog" class="mw-redirect" title="Warblog">Warblog</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Technology</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">General</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/BitTorrent" title="BitTorrent">BitTorrent</a></li> <li><a href="/wiki/Feed_URI_scheme" title="Feed URI scheme">Feed URI scheme</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Features</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Linkback" title="Linkback">Linkback</a></li> <li><a href="/wiki/Permalink" title="Permalink">Permalink</a></li> <li><a href="/wiki/Ping_(blogging)" title="Ping (blogging)">Ping</a></li> <li><a href="/wiki/Pingback" title="Pingback">Pingback</a></li> <li><a href="/wiki/Reblogging" title="Reblogging">Reblogging</a></li> <li><a href="/wiki/Refback" title="Refback">Refback</a></li> <li><a href="/wiki/Rollback_(data_management)" title="Rollback (data management)">Rollback</a></li> <li><a href="/wiki/Trackback" title="Trackback">Trackback</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Mechanism</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Thread_(Internet)" class="mw-redirect" title="Thread (Internet)">Thread</a></li> <li><a href="/wiki/Geotagging" title="Geotagging">Geotagging</a></li> <li><a href="/wiki/RSS_enclosure" title="RSS enclosure">RSS enclosure</a></li> <li><a href="/wiki/FeedSync#Examples" title="FeedSync">Synchronization</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Memetics" title="Memetics">Memetics</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Atom_(web_standard)" title="Atom (web standard)">Atom feed</a></li> <li><a href="/wiki/Data_feed" title="Data feed">Data feed</a></li> <li><a href="/wiki/Photofeed" title="Photofeed">Photofeed</a></li> <li><a href="/wiki/Product_feed" title="Product feed">Product feed</a></li> <li><a href="/wiki/Resource_Description_Framework" title="Resource Description Framework">RDF feed</a></li> <li><a href="/wiki/Web_feed" title="Web feed">Web feed</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/RSS" title="RSS">RSS</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/GeoRSS" title="GeoRSS">GeoRSS</a></li> <li><a href="/wiki/Media_RSS" title="Media RSS">MRSS</a></li> <li><a href="/wiki/RSS_TV" title="RSS TV">RSS TV</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Social</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Inter-process_communication" title="Inter-process communication">Inter-process communication</a></li> <li><a href="/wiki/Mashup_(web_application_hybrid)" title="Mashup (web application hybrid)">Mashup</a></li> <li><a href="/wiki/Reference_(computer_science)" title="Reference (computer science)">Referencing</a></li> <li><a href="/wiki/RSS_editor" title="RSS editor">RSS editor</a></li> <li><a href="/wiki/RSS_tracking" title="RSS tracking">RSS tracking</a></li> <li><a href="/wiki/Streaming_media" title="Streaming media">Streaming media</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Standard</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a class="mw-selflink selflink">OPML</a></li> <li><a href="/wiki/RSS_Advisory_Board" title="RSS Advisory Board">RSS Advisory Board</a></li> <li><a href="/wiki/Usenet" title="Usenet">Usenet</a></li> <li><a href="/wiki/World_Wide_Web" title="World Wide Web">World Wide Web</a></li> <li><a href="/wiki/XBEL" title="XBEL">XBEL</a></li> <li><a href="/wiki/XOXO_(microformat)" title="XOXO (microformat)">XOXO</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Form</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Category:Audio_podcasts" title="Category:Audio podcasts">Audio podcast</a></li> <li><a href="/wiki/Enhanced_podcast" class="mw-redirect" title="Enhanced podcast">Enhanced podcast</a></li> <li><a href="/wiki/Mobilecast" class="mw-redirect" title="Mobilecast">Mobilecast</a></li> <li><a href="/wiki/Narrowcasting" title="Narrowcasting">Narrowcasting</a></li> <li><a href="/wiki/Peercasting" title="Peercasting">Peercasting</a></li> <li><a href="/wiki/Screencast" title="Screencast">Screencast</a></li> <li><a href="/wiki/Slidecasting" class="mw-redirect" title="Slidecasting">Slidecasting</a></li> <li><a href="/wiki/Videocast" class="mw-redirect" title="Videocast">Videocast</a></li> <li><a href="/wiki/Webcomic" title="Webcomic">Webcomic</a></li> <li><a href="/wiki/Webtoon" title="Webtoon">Webtoon</a></li> <li><a href="/wiki/Web_series" title="Web series">Web series</a></li></ul> </div></td></tr><tr><td colspan="2" class="navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Anonymous_blog" title="Anonymous blog">Anonymous blogging</a></li> <li><a href="/wiki/Blog#Types" title="Blog">Collaborative blog</a></li> <li><a href="/wiki/Columnist" title="Columnist">Columnist</a></li> <li><a href="/wiki/Instant_messaging" title="Instant messaging">Instant messaging</a></li> <li><a href="/wiki/Liveblogging" title="Liveblogging">Liveblogging</a></li> <li><a href="/wiki/Microblogging" title="Microblogging">Microblog</a></li> <li><a href="/wiki/Mobile_blogging" title="Mobile blogging">Mobile blogging</a></li> <li><a href="/wiki/Spam_blog" title="Spam blog">Spam blog</a></li> <li><a href="/wiki/Video_blog" class="mw-redirect" title="Video blog">Video blogging</a></li> <li><a href="/wiki/Motovlog" title="Motovlog">Motovlogging</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Media</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Alternative_media" title="Alternative media">Alternative media</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Blog_carnival" class="mw-redirect" title="Blog carnival">Carnivals</a></li> <li><a href="/wiki/Blog_fiction" title="Blog fiction">Fiction</a></li> <li><a href="/wiki/Journalism" title="Journalism">Journalism</a> <ul><li><a href="/wiki/Citizen_journalism" title="Citizen journalism">Citizen</a></li> <li><a href="/wiki/Database_journalism" title="Database journalism">Database</a></li></ul></li> <li><a href="/wiki/Online_diary" title="Online diary">Online diary</a></li> <li><a href="/wiki/List_of_search_engines#Blog" title="List of search engines">Search engines</a></li> <li><a href="/wiki/Sideblog" title="Sideblog">Sideblog</a></li> <li><a href="/wiki/Blog" title="Blog">Software</a></li> <li><a href="/wiki/Web_directory" title="Web directory">Web directory</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Micromedia</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Comparison_of_feed_aggregators" title="Comparison of feed aggregators">Aggregation</a> <ul><li><a href="/wiki/News_aggregator" title="News aggregator">News</a></li> <li><a href="/wiki/Poll_aggregator" title="Poll aggregator">Poll</a></li> <li><a href="/wiki/Review_aggregator" title="Review aggregator">Review</a></li> <li><a href="/wiki/Search_aggregator" title="Search aggregator">Search</a></li> <li><a href="/wiki/Video_aggregator" title="Video aggregator">Video</a></li></ul></li> <li><a href="/wiki/Atom_(Web_standard)" class="mw-redirect" title="Atom (Web standard)">Atom</a></li> <li><a href="/wiki/Atom_(Web_standard)" class="mw-redirect" title="Atom (Web standard)">AtomPub</a></li> <li><a href="/wiki/Broadcatching" title="Broadcatching">Broadcatching</a></li> <li><a href="/wiki/Hashtag" title="Hashtag">Hashtag</a></li> <li><a href="/wiki/NewsML" class="mw-redirect" title="NewsML">NewsML</a> <ul><li><a href="/wiki/NewsML_1" class="mw-redirect" title="NewsML 1">1</a></li> <li><a href="/wiki/NewsML-G2" class="mw-redirect" title="NewsML-G2">G2</a></li></ul></li> <li><a href="/wiki/Communication" title="Communication">Social communication</a></li> <li><a href="/wiki/Social_software" title="Social software">Social software</a></li> <li><a href="/wiki/Web_Slice" title="Web Slice">Web Slice</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Blogosphere" title="Blogosphere">Blogosphere</a></li> <li><a href="/wiki/Escribitionist" title="Escribitionist">Escribitionist</a></li> <li><a href="/wiki/Glossary_of_blogging" title="Glossary of blogging">Glossary of blogging</a></li> <li><a href="/wiki/Pay-per-click" title="Pay-per-click">Pay per click</a></li> <li><a href="/wiki/Posting_style" title="Posting style">Posting style</a></li> <li><a href="/wiki/Slashdot_effect" title="Slashdot effect">Slashdot effect</a></li> <li><a href="/wiki/Spam_in_blogs" title="Spam in blogs">Spam in blogs</a></li> <li><a href="/wiki/Uses_of_podcasting" title="Uses of podcasting">Uses of podcasting</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table></div>    </div><noscript><img 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