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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-History" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#History"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>History</span> </div> </a> <ul id="toc-History-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Versions_and_variants" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Versions_and_variants"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Versions and variants</span> </div> </a> <button aria-controls="toc-Versions_and_variants-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Versions and variants subsection</span> </button> <ul id="toc-Versions_and_variants-sublist" class="vector-toc-list"> <li id="toc-HTML+RDFa" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#HTML+RDFa"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>HTML+RDFa</span> </div> </a> <ul id="toc-HTML+RDFa-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-RDFa_1.0" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#RDFa_1.0"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.2</span> <span>RDFa 1.0</span> </div> </a> <ul id="toc-RDFa_1.0-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-RDFa_1.1" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#RDFa_1.1"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.3</span> <span>RDFa 1.1</span> </div> </a> <ul id="toc-RDFa_1.1-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-RDFa_Lite" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#RDFa_Lite"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.4</span> <span>RDFa Lite</span> </div> </a> <ul id="toc-RDFa_Lite-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Essence" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Essence"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Essence</span> </div> </a> <ul id="toc-Essence-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Benefits" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Benefits"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Benefits</span> </div> </a> <ul id="toc-Benefits-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Usage" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Usage"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Usage</span> </div> </a> <button aria-controls="toc-Usage-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Usage subsection</span> </button> <ul id="toc-Usage-sublist" class="vector-toc-list"> <li id="toc-HTML+RDFa_statistics" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#HTML+RDFa_statistics"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.1</span> <span>HTML+RDFa statistics</span> </div> </a> <ul id="toc-HTML+RDFa_statistics-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-RDFa_editors" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#RDFa_editors"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.2</span> <span>RDFa editors</span> </div> </a> <ul id="toc-RDFa_editors-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Examples" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Examples"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.3</span> <span>Examples</span> </div> </a> <ul id="toc-Examples-sublist" class="vector-toc-list"> <li id="toc-XHTML_+_RDFa_1.0" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#XHTML_+_RDFa_1.0"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.3.1</span> <span>XHTML + RDFa 1.0</span> </div> </a> <ul id="toc-XHTML_+_RDFa_1.0-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-HTML5_+_RDFa_1.1" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#HTML5_+_RDFa_1.1"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.3.2</span> <span>HTML5 + RDFa 1.1</span> </div> </a> <ul id="toc-HTML5_+_RDFa_1.1-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> </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">6</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">7</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">8</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">RDFa</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 9 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-9" 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">9 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/RDFa" title="RDFa – Czech" lang="cs" hreflang="cs" data-title="RDFa" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/RDFa" title="RDFa – German" lang="de" hreflang="de" data-title="RDFa" 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/RDFa" title="RDFa – Spanish" lang="es" hreflang="es" data-title="RDFa" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/RDFa" title="RDFa – French" lang="fr" hreflang="fr" data-title="RDFa" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-pms mw-list-item"><a href="https://pms.wikipedia.org/wiki/RDFa" title="RDFa – Piedmontese" lang="pms" hreflang="pms" data-title="RDFa" data-language-autonym="Piemontèis" data-language-local-name="Piedmontese" class="interlanguage-link-target"><span>Piemontèis</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/RDFa" title="RDFa – Portuguese" lang="pt" hreflang="pt" data-title="RDFa" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/RDFa" title="RDFa – Slovak" lang="sk" hreflang="sk" data-title="RDFa" data-language-autonym="Slovenčina" data-language-local-name="Slovak" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/RDFa" title="RDFa – Ukrainian" lang="uk" hreflang="uk" data-title="RDFa" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/RDFa" title="RDFa – Chinese" lang="zh" hreflang="zh" data-title="RDFa" 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/Q507673#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/RDFa" 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:RDFa" 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" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Change language variant" > <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" ><span class="vector-dropdown-label-text">English</span> </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="Views"> <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/RDFa"><span>Read</span></a></li><li id="ca-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=RDFa&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=RDFa&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" data-event-name="pinnable-header.vector-page-tools.unpin">hide</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="More options" > <div class="vector-menu-heading"> Actions </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/RDFa"><span>Read</span></a></li><li id="ca-more-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=RDFa&action=edit" title="Edit this page [e]" accesskey="e"><span>Edit</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=RDFa&action=history"><span>View history</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> General </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Special:WhatLinksHere/RDFa" 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/RDFa" 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=RDFa&oldid=1232552061" 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=RDFa&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=RDFa&id=1232552061&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%2FRDFa"><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%2FRDFa"><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=RDFa&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=RDFa&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 id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q507673" 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">Format for expressing RDF statements in HTML documents</div> <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 hproduct"><caption class="infobox-title fn">RDF in Attributes</caption><tbody><tr><th scope="row" class="infobox-label">Abbreviation</th><td class="infobox-data">RDFa</td></tr><tr><th scope="row" class="infobox-label">Status</th><td class="infobox-data">Published</td></tr><tr><th scope="row" class="infobox-label">Year started</th><td class="infobox-data">2004</td></tr><tr><th scope="row" class="infobox-label">Editors</th><td class="infobox-data">Ben Adida, Mark Birbeck</td></tr><tr><th scope="row" class="infobox-label">Base standards</th><td class="infobox-data"><a href="/wiki/Resource_Description_Framework" title="Resource Description Framework">RDF</a></td></tr><tr><th scope="row" class="infobox-label">Related standards</th><td class="infobox-data"><a href="/wiki/RDF_Schema" title="RDF Schema">RDF Schema</a>, <a href="/wiki/Web_Ontology_Language" title="Web Ontology Language">OWL</a></td></tr><tr><th scope="row" class="infobox-label">Domain</th><td class="infobox-data"><a href="/wiki/Semantic_Web" title="Semantic Web">Semantic Web</a></td></tr><tr><th scope="row" class="infobox-label">Website</th><td class="infobox-data"><span class="url"><a rel="nofollow" class="external text" href="http://www.w3.org/TR/rdfa-primer/">www<wbr />.w3<wbr />.org<wbr />/TR<wbr />/rdfa-primer<wbr />/</a></span></td></tr></tbody></table> <p><b>RDFa</b> or <b>Resource Description Framework in Attributes</b><sup id="cite_ref-rdfa-primer_1-0" class="reference"><a href="#cite_note-rdfa-primer-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> is a <a href="/wiki/W3C" class="mw-redirect" title="W3C">W3C</a> Recommendation that adds a set of <a href="/wiki/HTML_attribute" title="HTML attribute">attribute-level</a> extensions to <a href="/wiki/HTML5" title="HTML5">HTML</a>, <a href="/wiki/XHTML" title="XHTML">XHTML</a> and various XML-based document types for embedding rich <a href="/wiki/Metadata" title="Metadata">metadata</a> within Web documents. The <a href="/wiki/Resource_Description_Framework" title="Resource Description Framework">Resource Description Framework</a> (RDF) data-model mapping enables its use for embedding RDF <a href="/wiki/Resource_Description_Framework#Overview" title="Resource Description Framework">subject-predicate-object expressions</a> within XHTML documents. It also enables the extraction of RDF model triples by compliant <a href="/wiki/User_agent" title="User agent">user agents</a>. </p><p>The RDFa community runs a <a href="/wiki/Wiki" title="Wiki">wiki</a> website to host tools, examples, and tutorials.<sup id="cite_ref-rdfa_wiki_2-0" class="reference"><a href="#cite_note-rdfa_wiki-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="History">History</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=RDFa&action=edit&section=1" title="Edit section: History"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>RDFa was first proposed by <a href="/w/index.php?title=Mark_Birbeck&action=edit&redlink=1" class="new" title="Mark Birbeck (page does not exist)">Mark Birbeck</a> in the form of a <a href="/wiki/W3C" class="mw-redirect" title="W3C">W3C</a> note entitled <i>XHTML and RDF</i>,<sup id="cite_ref-xhtml_and_rdf_note1_3-0" class="reference"><a href="#cite_note-xhtml_and_rdf_note1-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> which was then presented to the Semantic Web Interest Group<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> at the W3C's 2004 Technical Plenary.<sup id="cite_ref-xhtml_and_rdf_note2_5-0" class="reference"><a href="#cite_note-xhtml_and_rdf_note2-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> Later that year the work became part of the sixth public Working Draft of XHTML 2.0.<sup id="cite_ref-xhtml_2_wd_6_6-0" class="reference"><a href="#cite_note-xhtml_2_wd_6-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-timelinehistory_7-0" class="reference"><a href="#cite_note-timelinehistory-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> Although it is generally assumed that RDFa was originally intended only for XHTML 2, in fact the purpose of RDFa was always to provide a way to add a metadata to <i>any</i> XML-based language. Indeed, one of the earliest documents bearing the <i>RDF/A Syntax</i> name has the sub-title <i>A collection of attributes for layering RDF on XML languages</i>.<sup id="cite_ref-rdfa_1_8-0" class="reference"><a href="#cite_note-rdfa_1-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> The document was written by Mark Birbeck and <a href="/wiki/Steven_Pemberton" title="Steven Pemberton">Steven Pemberton</a>, and was made available for discussion on October 11, 2004. </p><p>In April 2007 the XHTML 2 Working Group produced a module to support RDF annotation within the XHTML 1 family.<sup id="cite_ref-rdfa_modules_ed_9-0" class="reference"><a href="#cite_note-rdfa_modules_ed-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> As an example, it included an extended version of XHTML 1.1 dubbed <a href="/wiki/XHTML%2BRDFa" title="XHTML+RDFa">XHTML+RDFa 1.0</a>. Although described as not representing an intended direction in terms of a formal markup language from the W3C, limited use of the XHTML+RDFa 1.0 <a href="/wiki/Document_Type_Definition" class="mw-redirect" title="Document Type Definition">DTD</a> did subsequently appear on the public Web.<sup id="cite_ref-xhtml_rdfa_1_examples_10-0" class="reference"><a href="#cite_note-xhtml_rdfa_1_examples-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> </p><p>October 2007 saw the first public Working Draft of a document entitled <i>RDFa in XHTML: Syntax and Processing</i>.<sup id="cite_ref-rdfa_syntax_wd1_11-0" class="reference"><a href="#cite_note-rdfa_syntax_wd1-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> This superseded and expanded upon the April draft; it contained rules for creating an RDFa parser, as well as guidelines for organizations wishing to make practical use of the technology. </p><p>In October 2008 RDFa 1.0 reached recommendation status.<sup id="cite_ref-rdfa_syntax_cr1_12-0" class="reference"><a href="#cite_note-rdfa_syntax_cr1-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> </p><p>RDFa 1.1 reached recommendation status in June 2012.<sup id="cite_ref-rdfa1_1_core_rec_13-0" class="reference"><a href="#cite_note-rdfa1_1_core_rec-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> It differs from RDFa 1.0 in that it no longer relies on the XML-specific namespace mechanism. Therefore, it is possible to use RDFa 1.1 with non-XML document types such as HTML 4 or HTML 5. Details can be found in an appendix to HTML 5.<sup id="cite_ref-html_plus_rdfa1_1_14-0" class="reference"><a href="#cite_note-html_plus_rdfa1_1-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> </p><p>An additional <i>RDFa 1.1 Primer</i> document was last updated 17 March 2015.<sup id="cite_ref-rdfa-primer_1-1" class="reference"><a href="#cite_note-rdfa-primer-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> (The first public Working Draft dates back to 10 March 2006.<sup id="cite_ref-xhtml-rdfa-primer0_15-0" class="reference"><a href="#cite_note-xhtml-rdfa-primer0-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup>) </p> <div class="mw-heading mw-heading2"><h2 id="Versions_and_variants">Versions and variants</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=RDFa&action=edit&section=2" title="Edit section: Versions and variants"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>There are some main well-defined variants of the basic concepts, that are used as reference and as abbreviation to the W3C standards. </p> <div class="mw-heading mw-heading3"><h3 id="HTML+RDFa"><span id="HTML.2BRDFa"></span>HTML+RDFa</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=RDFa&action=edit&section=3" title="Edit section: HTML+RDFa"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>RDFa was defined in 2008 with the "RDFa in XHTML: Syntax and Processing" Recommendation.<sup id="cite_ref-RDFa2008_16-0" class="reference"><a href="#cite_note-RDFa2008-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> Its first application was to be a <a href="/wiki/XHTML_Modularization" title="XHTML Modularization">module of XHTML</a>. </p><p>The HTML applications remained, <i>"a collection of attributes and processing rules for extending XHTML to support RDF"</i> expanded to HTML5, are now expressed in a specialized standard, the "HTML+RDFa" (the last is <i>"HTML+RDFa 1.1 - Support for RDFa in HTML4 and HTML5"</i><sup id="cite_ref-html-rdfa_17-0" class="reference"><a href="#cite_note-html-rdfa-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup>). </p> <div class="mw-heading mw-heading3"><h3 id="RDFa_1.0">RDFa 1.0</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=RDFa&action=edit&section=4" title="Edit section: RDFa 1.0"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The <i>"HTML+RDFa"</i> syntax of 2008 was also termed <i>"RDFa 1.0"</i>, so, there is no "RDFa Core 1.0" standard. In general this 2008's <i>RDFa 1.0</i> is used with the old <a href="/wiki/XHTML" title="XHTML">XHTML</a> standards (as long as <i>RDFa 1.1</i> is used with XHTML5 and HTML5). </p> <div class="mw-heading mw-heading3"><h3 id="RDFa_1.1">RDFa 1.1</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=RDFa&action=edit&section=5" title="Edit section: RDFa 1.1"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Is the first generic (for HTML and XML) RDFa standard; the "RDFa Core 1.1" is in the Third Edition, since 2015.<sup id="cite_ref-rdfa-core_18-0" class="reference"><a href="#cite_note-rdfa-core-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="RDFa_Lite">RDFa Lite</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=RDFa&action=edit&section=6" title="Edit section: RDFa Lite"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>RDFa Lite is a W3C Recommendation (1.0 and 1.1) since 2009,<sup id="cite_ref-RDFaLite1.0_19-0" class="reference"><a href="#cite_note-RDFaLite1.0-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> where it is described as follows:<sup id="cite_ref-RDFaLite1.1_20-0" class="reference"><a href="#cite_note-RDFaLite1.1-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup> </p> <blockquote> <p>RDFa Lite is minimal subset of RDFa ... consisting of a few attributes that may be used to express <a href="/wiki/Machine-readable_data" class="mw-redirect" title="Machine-readable data">machine-readable data</a> in Web documents like HTML, SVG, and XML. While it is not a complete solution for advanced data markup tasks, it does work for most day-to-day needs and can be learned by most Web authors in a day. </p> </blockquote> <p>RDFa Lite consists of five attributes: vocab, typeof, property, resource, and prefix.<sup id="cite_ref-RDFaLite1.1_20-1" class="reference"><a href="#cite_note-RDFaLite1.1-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup> RDFa 1.1 Lite is upwards compatible with RDFa 1.1.<sup id="cite_ref-RDFaLite1.1_20-2" class="reference"><a href="#cite_note-RDFaLite1.1-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup> </p><p>In 2009 the W3C was positioned<sup id="cite_ref-21" class="reference"><a href="#cite_note-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup> to retain <i>RDFa Lite</i> as unique and definitive standard alternative to <a href="/wiki/Microdata_(HTML)" title="Microdata (HTML)">Microdata</a>.<sup id="cite_ref-22" class="reference"><a href="#cite_note-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> The position was confirmed with the publication of the HTML5 Recommendation in 2014. </p> <div class="mw-heading mw-heading2"><h2 id="Essence">Essence</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=RDFa&action=edit&section=7" title="Edit section: Essence"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The essence of RDFa is to provide a set of attributes that can be used to carry metadata in an XML language (hence the 'a' in RDFa). </p><p>These attributes are: </p> <dl><dt><style data-mw-deduplicate="TemplateStyles:r886049734">.mw-parser-output .monospaced{font-family:monospace,monospace}</style><span class="monospaced">about</span></dt> <dd>a <a href="/wiki/URI" class="mw-redirect" title="URI">URI</a> or <a href="/wiki/CURIE" title="CURIE">CURIE</a> specifying the resource the metadata is about</dd> <dt><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886049734"><span class="monospaced">rel</span> and <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886049734"><span class="monospaced">rev</span></dt> <dd>specifying a relationship and reverse-relationship with another resource, respectively</dd> <dt><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886049734"><span class="monospaced">src</span>, <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886049734"><span class="monospaced"><a href="/wiki/Href" class="mw-redirect" title="Href">href</a></span> and <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886049734"><span class="monospaced">resource</span></dt> <dd>specifying the partner resource</dd> <dt><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886049734"><span class="monospaced">property</span></dt> <dd>specifying a property for the content of an element or the partner resource</dd> <dt><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886049734"><span class="monospaced">content</span></dt> <dd>optional attribute that overrides the content of the element when using the property attribute</dd> <dt><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886049734"><span class="monospaced">datatype</span></dt> <dd>optional attribute that specifies the <a href="/wiki/Datatype" class="mw-redirect" title="Datatype">datatype</a> of text specified for use with the property attribute</dd> <dt><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886049734"><span class="monospaced">typeof</span></dt> <dd>optional attribute that specifies the RDF type(s) of the subject or the partner resource (the resource that the metadata is about).</dd></dl> <div class="mw-heading mw-heading2"><h2 id="Benefits">Benefits</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=RDFa&action=edit&section=8" title="Edit section: Benefits"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>There are five "principles of interoperable metadata" met by RDFa.<sup id="cite_ref-23" class="reference"><a href="#cite_note-23"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup> </p> <ul><li>Publisher Independence – each site can use its own standards</li> <li>Data Reuse – data are not duplicated. Separate XML and HTML sections are not required for the same content.</li> <li>Self Containment – the HTML and the RDF are separated</li> <li>Schema Modularity – the attributes are reusable</li></ul> <p>Additionally RDFa may benefit <a href="/wiki/Web_accessibility" title="Web accessibility">web accessibility</a> as more information is available to <a href="/wiki/Assistive_Technology_Service_Provider_Interface" title="Assistive Technology Service Provider Interface">assistive technology</a>.<sup id="cite_ref-24" class="reference"><a href="#cite_note-24"><span class="cite-bracket">[</span>24<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Usage">Usage</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=RDFa&action=edit&section=9" title="Edit section: Usage"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>There is a growing number of tools for better usage of RDFa vocabularies and RDFa annotation. </p> <div class="mw-heading mw-heading3"><h3 id="HTML+RDFa_statistics"><span id="HTML.2BRDFa_statistics"></span>HTML+RDFa statistics</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=RDFa&action=edit&section=10" title="Edit section: HTML+RDFa statistics"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure typeof="mw:File/Thumb"><a href="/wiki/File:RDFa-UsageStatistics-charts.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b6/RDFa-UsageStatistics-charts.png/280px-RDFa-UsageStatistics-charts.png" decoding="async" width="280" height="343" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b6/RDFa-UsageStatistics-charts.png/420px-RDFa-UsageStatistics-charts.png 1.5x, //upload.wikimedia.org/wikipedia/commons/b/b6/RDFa-UsageStatistics-charts.png 2x" data-file-width="500" data-file-height="613" /></a><figcaption>2013 survey pizza charts of percentage usage,<sup id="cite_ref-webstats2013_25-0" class="reference"><a href="#cite_note-webstats2013-25"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup> showing that 79% of URLs and 43% of domains use <i>HTML+RDFa</i>. The average 61% (the other 39% was Microformats) is the <i>usage indicator</i>.</figcaption></figure> <p>Simplified approaches to semantically annotate information items in <a href="/wiki/Webpages" class="mw-redirect" title="Webpages">webpages</a> were greatly encouraged by the <a href="#HTML+RDFa">HTML+RDFa</a> (released in 2008) and <a href="/wiki/Microformats" class="mw-redirect" title="Microformats">microformats</a> (since ~2005) standards. </p><p>As of 2013<sup class="plainlinks noexcerpt noprint asof-tag update" style="display:none;"><a class="external text" href="https://en.wikipedia.org/w/index.php?title=RDFa&action=edit">[update]</a></sup> these standards were encoding events, contact information, products, and so on. Despite the <a href="/wiki/VCard" title="VCard">vCard</a> semantics (only basic items of <a href="/wiki/Person" title="Person">person</a> and <a href="/wiki/Organization" title="Organization">organization</a> annotations) dominance,<sup id="cite_ref-webstats2013_25-1" class="reference"><a href="#cite_note-webstats2013-25"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup> and some <a href="/wiki/Boilerplate_(text)" class="mw-redirect" title="Boilerplate (text)">cloning</a> of annotations along the same <a href="/wiki/Domain_name" title="Domain name">domain</a>, the counting of webpages (URLs) and domains with annotations is an important statistical indicator for <i>usage of semantically annotated information</i> in the Web. </p><p>The statistics of 2017 show that usage<sup id="cite_ref-webstats2017_26-0" class="reference"><a href="#cite_note-webstats2017-26"><span class="cite-bracket">[</span>26<span class="cite-bracket">]</span></a></sup> of HTML+RDFa is now less than that of Microformats. </p> <div class="mw-heading mw-heading3"><h3 id="RDFa_editors">RDFa editors</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=RDFa&action=edit&section=11" title="Edit section: RDFa editors"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <dl><dt>Web-based RDFa editors</dt> <dd>There are already a few RDFa editors available online. <a href="/w/index.php?title=RDFaCE&action=edit&redlink=1" class="new" title="RDFaCE (page does not exist)">RDFaCE</a> (RDFa Content Editor) is a <a href="/wiki/WYSIWYM" title="WYSIWYM">WYSIWYM</a> editor based on <a href="/wiki/TinyMCE" title="TinyMCE">TinyMCE</a> to support RDFa content authoring. It supports manual and semi-automatic generation of RDFa with the support of annotation services such as <a href="/wiki/DBpedia_Spotlight" class="mw-redirect" title="DBpedia Spotlight">DBpedia Spotlight</a>, <a href="/wiki/OpenCalais" class="mw-redirect" title="OpenCalais">OpenCalais</a>, <a href="/wiki/Alchemy_API" class="mw-redirect" title="Alchemy API">Alchemy API</a>, among others.<sup id="cite_ref-27" class="reference"><a href="#cite_note-27"><span class="cite-bracket">[</span>27<span class="cite-bracket">]</span></a></sup> RDFaCE-Lite is a version of RDFaCE also supporting <a href="/wiki/Microdata_(HTML)" title="Microdata (HTML)">Microdata</a> and available as a WordPress plugin.<sup id="cite_ref-28" class="reference"><a href="#cite_note-28"><span class="cite-bracket">[</span>28<span class="cite-bracket">]</span></a></sup></dd></dl> <dl><dt>Desktop RDFa editors</dt> <dd><a href="/w/index.php?title=Aut%C3%B4Meta&action=edit&redlink=1" class="new" title="AutôMeta (page does not exist)">AutôMeta</a> is an environment for semi-automatic (or automatic) annotation of documents for publishing on the Web using RDFa. It also includes a RDFa extraction tool to provide the user with a view of the annotated triples. It is available in both <a href="/wiki/Command-line_interface" title="Command-line interface">CLI</a> and <a href="/wiki/GUI" class="mw-redirect" title="GUI">GUI</a> interfaces.<sup id="cite_ref-29" class="reference"><a href="#cite_note-29"><span class="cite-bracket">[</span>29<span class="cite-bracket">]</span></a></sup></dd></dl> <div class="mw-heading mw-heading3"><h3 id="Examples">Examples</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=RDFa&action=edit&section=12" title="Edit section: Examples"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The following is an example of adding <a href="/wiki/Dublin_Core" title="Dublin Core">Dublin Core</a> metadata to an XML element in an XHTML file. Dublin Core data elements are data typically added to a book or article (title, author, subject etc.) </p> <div class="mw-highlight mw-highlight-lang-xml mw-content-ltr" dir="ltr"><pre><span></span><span class="nt"><div</span><span class="w"> </span><span class="na">xmlns:dc=</span><span class="s">"http://purl.org/dc/elements/1.1/"</span> <span class="w"> </span><span class="na">about=</span><span class="s">"http://www.example.com/books/wikinomics"</span><span class="nt">></span> <span class="w"> </span><span class="nt"><span</span><span class="w"> </span><span class="na">property=</span><span class="s">"dc:title"</span><span class="nt">></span>Wikinomics<span class="nt"></span></span> <span class="w"> </span><span class="nt"><span</span><span class="w"> </span><span class="na">property=</span><span class="s">"dc:creator"</span><span class="nt">></span>Don<span class="w"> </span>Tapscott<span class="nt"></span></span> <span class="w"> </span><span class="nt"><span</span><span class="w"> </span><span class="na">property=</span><span class="s">"dc:date"</span><span class="nt">></span>2006-10-01<span class="nt"></span></span> <span class="nt"></div></span> </pre></div> <p>Moreover, RDFa allows the passages and words within a text to be associated with semantic markup: </p> <div class="mw-highlight mw-highlight-lang-xml mw-content-ltr" dir="ltr"><pre><span></span><span class="nt"><div</span><span class="w"> </span><span class="na">xmlns:dc=</span><span class="s">"http://purl.org/dc/elements/1.1/"</span> <span class="w"> </span><span class="na">about=</span><span class="s">"http://www.example.com/books/wikinomics"</span><span class="nt">></span> <span class="w"> </span>In<span class="w"> </span>his<span class="w"> </span>latest<span class="w"> </span>book <span class="w"> </span><span class="nt"><span</span><span class="w"> </span><span class="na">property=</span><span class="s">"dc:title"</span><span class="nt">></span>Wikinomics<span class="nt"></span></span>, <span class="w"> </span><span class="nt"><span</span><span class="w"> </span><span class="na">property=</span><span class="s">"dc:creator"</span><span class="nt">></span>Don<span class="w"> </span>Tapscott<span class="nt"></span></span> <span class="w"> </span>explains<span class="w"> </span>deep<span class="w"> </span>changes<span class="w"> </span>in<span class="w"> </span>technology, <span class="w"> </span>demographics<span class="w"> </span>and<span class="w"> </span>business. <span class="w"> </span>The<span class="w"> </span>book<span class="w"> </span>is<span class="w"> </span>due<span class="w"> </span>to<span class="w"> </span>be<span class="w"> </span>published<span class="w"> </span>in <span class="w"> </span><span class="nt"><span</span><span class="w"> </span><span class="na">property=</span><span class="s">"dc:date"</span><span class="w"> </span><span class="na">content=</span><span class="s">"2006-10-01"</span><span class="nt">></span>October<span class="w"> </span>2006<span class="nt"></span></span>. <span class="nt"></div></span> </pre></div> <div class="mw-heading mw-heading4"><h4 id="XHTML_+_RDFa_1.0"><span id="XHTML_.2B_RDFa_1.0"></span>XHTML + RDFa 1.0</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=RDFa&action=edit&section=13" title="Edit section: XHTML + RDFa 1.0"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The following is an example of a complete XHTML+RDFa 1.0 document. It uses <a href="/wiki/Dublin_Core" title="Dublin Core">Dublin Core</a> and <a href="/wiki/FOAF_(software)" class="mw-redirect" title="FOAF (software)">FOAF</a>, an ontology for describing people and their relationships with other people and things: </p> <div class="mw-highlight mw-highlight-lang-xml mw-content-ltr" dir="ltr"><pre><span></span><span class="cp"><?xml version="1.0" encoding="UTF-8"?></span> <span class="cp"><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN"</span> <span class="cp"> "http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd"></span> <span class="nt"><html</span><span class="w"> </span><span class="na">xmlns=</span><span class="s">"http://www.w3.org/1999/xhtml"</span> <span class="w"> </span><span class="na">xmlns:foaf=</span><span class="s">"http://xmlns.com/foaf/0.1/"</span> <span class="w"> </span><span class="na">xmlns:dc=</span><span class="s">"http://purl.org/dc/elements/1.1/"</span> <span class="w"> </span><span class="na">version=</span><span class="s">"XHTML+RDFa 1.0"</span><span class="w"> </span><span class="na">xml:lang=</span><span class="s">"en"</span><span class="nt">></span> <span class="w"> </span><span class="nt"><head></span> <span class="w"> </span><span class="nt"><title></span>John's<span class="w"> </span>Home<span class="w"> </span>Page<span class="nt"></title></span> <span class="w"> </span><span class="nt"><base</span><span class="w"> </span><span class="na">href=</span><span class="s">"http://example.org/john-d/"</span><span class="w"> </span><span class="nt">/></span> <span class="w"> </span><span class="nt"><meta</span><span class="w"> </span><span class="na">property=</span><span class="s">"dc:creator"</span><span class="w"> </span><span class="na">content=</span><span class="s">"Jonathan Doe"</span><span class="w"> </span><span class="nt">/></span> <span class="w"> </span><span class="nt"><link</span><span class="w"> </span><span class="na">rel=</span><span class="s">"foaf:primaryTopic"</span><span class="w"> </span><span class="na">href=</span><span class="s">"http://example.org/john-d/#me"</span><span class="w"> </span><span class="nt">/></span> <span class="w"> </span><span class="nt"></head></span> <span class="w"> </span><span class="nt"><body</span><span class="w"> </span><span class="na">about=</span><span class="s">"http://example.org/john-d/#me"</span><span class="nt">></span> <span class="w"> </span><span class="nt"><h1></span>John's<span class="w"> </span>Home<span class="w"> </span>Page<span class="nt"></h1></span> <span class="w"> </span><span class="nt"><p></span>My<span class="w"> </span>name<span class="w"> </span>is<span class="w"> </span><span class="nt"><span</span><span class="w"> </span><span class="na">property=</span><span class="s">"foaf:nick"</span><span class="nt">></span>John<span class="w"> </span>D<span class="nt"></span></span><span class="w"> </span>and<span class="w"> </span>I<span class="w"> </span>like <span class="w"> </span><span class="nt"><a</span><span class="w"> </span><span class="na">href=</span><span class="s">"http://www.neubauten.org/"</span><span class="w"> </span><span class="na">rel=</span><span class="s">"foaf:interest"</span> <span class="w"> </span><span class="na">xml:lang=</span><span class="s">"de"</span><span class="nt">></span>Einstürzende<span class="w"> </span>Neubauten<span class="nt"></a></span>. <span class="w"> </span><span class="nt"></p></span> <span class="w"> </span><span class="nt"><p></span> <span class="w"> </span>My<span class="w"> </span><span class="nt"><span</span><span class="w"> </span><span class="na">rel=</span><span class="s">"foaf:interest"</span><span class="w"> </span><span class="na">resource=</span><span class="s">"urn:ISBN:0752820907"</span><span class="nt">></span>favorite <span class="w"> </span>book<span class="w"> </span>is<span class="w"> </span>the<span class="w"> </span>inspiring<span class="w"> </span><span class="nt"><span</span><span class="w"> </span><span class="na">about=</span><span class="s">"urn:ISBN:0752820907"</span><span class="nt">><cite</span> <span class="w"> </span><span class="na">property=</span><span class="s">"dc:title"</span><span class="nt">></span>Weaving<span class="w"> </span>the<span class="w"> </span>Web<span class="nt"></cite></span><span class="w"> </span>by <span class="w"> </span><span class="nt"><span</span><span class="w"> </span><span class="na">property=</span><span class="s">"dc:creator"</span><span class="nt">></span>Tim<span class="w"> </span>Berners-Lee<span class="nt"></span></span></span></span>. <span class="w"> </span><span class="nt"></p></span> <span class="w"> </span><span class="nt"></body></span> <span class="nt"></html></span> </pre></div> <p>In the example above, the document URI can be seen as representing an HTML document, but the document URI plus the "#me" string <code>http://example.org/john-d/#me</code> represents the actual person, as distinct from a document about them. The <i>foaf:primaryTopic</i> in the header tells us a URI of the person the document is about. The <i>foaf:nick</i> property (in the first <code>span</code> element) contains a nickname for this person, and the <i>dc:creator</i> property (in the <code>meta</code> element) tells us who created the document. The hyperlink to the Einstürzende Neubauten website contains <code>rel="foaf:interest"</code>, suggesting that John Doe is interested in this band. The URI of their website is a resource. </p><p>The <i>foaf:interest</i> inside the second <code>p</code> element is referring to a book by ISBN. The <code>resource</code> attribute defines a resource in a similar way to the <code>href</code> attribute, but without defining a hyperlink. Further into the paragraph, a <code>span</code> element containing an <code>about</code> attribute defines the book as another resource to specify metadata about. The book title and author are defined within the contents of this tag using the <i>dc:title</i> and <i>dc:creator</i> properties. </p><p>Here are the same triples when the above document is automatically converted to <a href="/wiki/RDF/XML" title="RDF/XML">RDF/XML</a>: </p> <div class="mw-highlight mw-highlight-lang-xml mw-content-ltr" dir="ltr"><pre><span></span><span class="cp"><?xml version="1.0" encoding="UTF-8"?></span> <span class="nt"><rdf:RDF</span><span class="w"> </span><span class="na">xmlns:rdf=</span><span class="s">"http://www.w3.org/1999/02/22-rdf-syntax-ns#"</span> <span class="w"> </span><span class="na">xmlns:foaf=</span><span class="s">"http://xmlns.com/foaf/0.1/"</span> <span class="w"> </span><span class="na">xmlns:dc=</span><span class="s">"http://purl.org/dc/elements/1.1/"</span><span class="nt">></span> <span class="w"> </span><span class="nt"><rdf:Description</span><span class="w"> </span><span class="na">rdf:about=</span><span class="s">"http://example.org/john-d/"</span><span class="nt">></span> <span class="w"> </span><span class="nt"><dc:creator</span><span class="w"> </span><span class="na">xml:lang=</span><span class="s">"en"</span><span class="nt">></span>Jonathan<span class="w"> </span>Doe<span class="nt"></dc:creator></span> <span class="w"> </span><span class="nt"><foaf:primaryTopic></span> <span class="w"> </span><span class="nt"><rdf:Description</span><span class="w"> </span><span class="na">rdf:about=</span><span class="s">"http://example.org/john-d/#me"</span><span class="nt">></span> <span class="w"> </span><span class="nt"><foaf:nick</span><span class="w"> </span><span class="na">xml:lang=</span><span class="s">"en"</span><span class="nt">></span>John<span class="w"> </span>D<span class="nt"></foaf:nick></span> <span class="w"> </span><span class="nt"><foaf:interest</span><span class="w"> </span><span class="na">rdf:resource=</span><span class="s">"http://www.neubauten.org/"</span><span class="nt">/></span> <span class="w"> </span><span class="nt"><foaf:interest></span> <span class="w"> </span><span class="nt"><rdf:Description</span><span class="w"> </span><span class="na">rdf:about=</span><span class="s">"urn:ISBN:0752820907"</span><span class="nt">></span> <span class="w"> </span><span class="nt"><dc:creator</span><span class="w"> </span><span class="na">xml:lang=</span><span class="s">"en"</span><span class="nt">></span>Tim<span class="w"> </span>Berners-Lee<span class="nt"></dc:creator></span> <span class="w"> </span><span class="nt"><dc:title</span><span class="w"> </span><span class="na">xml:lang=</span><span class="s">"en"</span><span class="nt">></span>Weaving<span class="w"> </span>the<span class="w"> </span>Web<span class="nt"></dc:title></span> <span class="w"> </span><span class="nt"></rdf:Description></span> <span class="w"> </span><span class="nt"></foaf:interest></span> <span class="w"> </span><span class="nt"></rdf:Description></span> <span class="w"> </span><span class="nt"></foaf:primaryTopic></span> <span class="w"> </span><span class="nt"></rdf:Description></span> <span class="nt"></rdf:RDF></span> </pre></div> <div class="mw-heading mw-heading4"><h4 id="HTML5_+_RDFa_1.1"><span id="HTML5_.2B_RDFa_1.1"></span>HTML5 + RDFa 1.1</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=RDFa&action=edit&section=14" title="Edit section: HTML5 + RDFa 1.1"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The above example can be expressed without <a href="/wiki/XML_namespaces" class="mw-redirect" title="XML namespaces">XML namespaces</a> in <a href="/wiki/HTML5" title="HTML5">HTML5</a>: </p> <div class="mw-highlight mw-highlight-lang-html mw-content-ltr" dir="ltr"><pre><span></span><span class="p"><</span><span class="nt">html</span> <span class="na">prefix</span><span class="o">=</span><span class="s">"dc: http://purl.org/dc/elements/1.1/"</span> <span class="na">lang</span><span class="o">=</span><span class="s">"en"</span><span class="p">></span> <span class="p"><</span><span class="nt">head</span><span class="p">></span> <span class="p"><</span><span class="nt">title</span><span class="p">></span>John's Home Page<span class="p"></</span><span class="nt">title</span><span class="p">></span> <span class="p"><</span><span class="nt">link</span> <span class="na">rel</span><span class="o">=</span><span class="s">"profile"</span> <span class="na">href</span><span class="o">=</span><span class="s">"http://www.w3.org/1999/xhtml/vocab"</span> <span class="p">/></span> <span class="p"><</span><span class="nt">base</span> <span class="na">href</span><span class="o">=</span><span class="s">"http://example.org/john-d/"</span> <span class="p">/></span> <span class="p"><</span><span class="nt">meta</span> <span class="na">property</span><span class="o">=</span><span class="s">"dc:creator"</span> <span class="na">content</span><span class="o">=</span><span class="s">"Jonathan Doe"</span> <span class="p">/></span> <span class="p"><</span><span class="nt">link</span> <span class="na">rel</span><span class="o">=</span><span class="s">"foaf:primaryTopic"</span> <span class="na">href</span><span class="o">=</span><span class="s">"http://example.org/john-d/#me"</span> <span class="p">/></span> <span class="p"></</span><span class="nt">head</span><span class="p">></span> <span class="p"><</span><span class="nt">body</span> <span class="na">about</span><span class="o">=</span><span class="s">"http://example.org/john-d/#me"</span><span class="p">></span> <span class="p"><</span><span class="nt">h1</span><span class="p">></span>John's Home Page<span class="p"></</span><span class="nt">h1</span><span class="p">></span> <span class="p"><</span><span class="nt">p</span><span class="p">></span>My name is <span class="p"><</span><span class="nt">span</span> <span class="na">property</span><span class="o">=</span><span class="s">"foaf:nick"</span><span class="p">></span>John D<span class="p"></</span><span class="nt">span</span><span class="p">></span> and I like <span class="p"><</span><span class="nt">a</span> <span class="na">href</span><span class="o">=</span><span class="s">"http://www.neubauten.org/"</span> <span class="na">rel</span><span class="o">=</span><span class="s">"foaf:interest"</span> <span class="na">lang</span><span class="o">=</span><span class="s">"de"</span><span class="p">></span>Einstürzende Neubauten<span class="p"></</span><span class="nt">a</span><span class="p">></span>. <span class="p"></</span><span class="nt">p</span><span class="p">></span> <span class="p"><</span><span class="nt">p</span><span class="p">></span> My <span class="p"><</span><span class="nt">span</span> <span class="na">rel</span><span class="o">=</span><span class="s">"foaf:interest"</span> <span class="na">resource</span><span class="o">=</span><span class="s">"urn:ISBN:0752820907"</span><span class="p">></span>favorite book is the inspiring <span class="p"><</span><span class="nt">span</span> <span class="na">about</span><span class="o">=</span><span class="s">"urn:ISBN:0752820907"</span><span class="p">><</span><span class="nt">cite</span> <span class="na">property</span><span class="o">=</span><span class="s">"dc:title"</span><span class="p">></span>Weaving the Web<span class="p"></</span><span class="nt">cite</span><span class="p">></span> by <span class="p"><</span><span class="nt">span</span> <span class="na">property</span><span class="o">=</span><span class="s">"dc:creator"</span><span class="p">></span>Tim Berners-Lee<span class="p"></</span><span class="nt">span</span><span class="p">></</span><span class="nt">span</span><span class="p">></</span><span class="nt">span</span><span class="p">></span>. <span class="p"></</span><span class="nt">p</span><span class="p">></span> <span class="p"></</span><span class="nt">body</span><span class="p">></span> <span class="p"></</span><span class="nt">html</span><span class="p">></span> </pre></div> <p>Note how the prefix foaf is still used without declaration. RDFa 1.1 automatically includes prefixes for popular vocabularies such as FOAF.<sup id="cite_ref-rdfa_initial_context_30-0" class="reference"><a href="#cite_note-rdfa_initial_context-30"><span class="cite-bracket">[</span>30<span class="cite-bracket">]</span></a></sup> </p><p><br /> The minimal <sup id="cite_ref-31" class="reference"><a href="#cite_note-31"><span class="cite-bracket">[</span>31<span class="cite-bracket">]</span></a></sup> document is: </p> <div class="mw-highlight mw-highlight-lang-html mw-content-ltr" dir="ltr"><pre><span></span><span class="p"><</span><span class="nt">html</span> <span class="na">lang</span><span class="o">=</span><span class="s">"en"</span><span class="p">></span> <span class="p"><</span><span class="nt">head</span><span class="p">></span> <span class="p"><</span><span class="nt">title</span><span class="p">></span>Example Document<span class="p"></</span><span class="nt">title</span><span class="p">></span> <span class="p"></</span><span class="nt">head</span><span class="p">></span> <span class="p"><</span><span class="nt">body</span> <span class="na">vocab</span><span class="o">=</span><span class="s">"http://schema.org/"</span><span class="p">></span> <span class="p"><</span><span class="nt">p</span> <span class="na">typeof</span><span class="o">=</span><span class="s">"Blog"</span><span class="p">></span> Welcome to my <span class="p"><</span><span class="nt">a</span> <span class="na">property</span><span class="o">=</span><span class="s">"url"</span> <span class="na">href</span><span class="o">=</span><span class="s">"http://example.org/"</span><span class="p">></span>blog<span class="p"></</span><span class="nt">a</span><span class="p">></span>. <span class="p"></</span><span class="nt">p</span><span class="p">></span> <span class="p"></</span><span class="nt">body</span><span class="p">></span> <span class="p"></</span><span class="nt">html</span><span class="p">></span> </pre></div> <p>That is, it is recommended that all of these attributes are used: <code>vocab</code>, <code>typeof</code>, <code>property</code>; not only one of them. </p><p><b>RDFa Structured Data Example</b> </p><p> Person Schema in RDFa.<sup id="cite_ref-32" class="reference"><a href="#cite_note-32"><span class="cite-bracket">[</span>32<span class="cite-bracket">]</span></a></sup></p><div class="mw-highlight mw-highlight-lang-html mw-content-ltr mw-highlight-lines" dir="ltr"><pre><span></span><span class="linenos" data-line="1"></span><span class="p"><</span><span class="nt">div</span> <span class="na">vocab</span><span class="o">=</span><span class="s">"http://schema.org/"</span> <span class="na">typeof</span><span class="o">=</span><span class="s">"Person"</span><span class="p">></span> <span class="linenos" data-line="2"></span> <span class="p"><</span><span class="nt">a</span> <span class="na">property</span><span class="o">=</span><span class="s">"image"</span> <span class="na">href</span><span class="o">=</span><span class="s">"http://manu.sporny.org/images/manu.png"</span><span class="p">></span> <span class="linenos" data-line="3"></span> <span class="p"><</span><span class="nt">span</span> <span class="na">property</span><span class="o">=</span><span class="s">"name"</span><span class="p">></span>Manu Sporny<span class="p"></</span><span class="nt">span</span><span class="p">></</span><span class="nt">a</span><span class="p">></span>, <span class="linenos" data-line="4"></span> <span class="p"><</span><span class="nt">span</span> <span class="na">property</span><span class="o">=</span><span class="s">"jobTitle"</span><span class="p">></span>Founder/CEO<span class="p"></</span><span class="nt">span</span><span class="p">></span> <span class="linenos" data-line="5"></span> <span class="p"><</span><span class="nt">div</span><span class="p">></span> <span class="linenos" data-line="6"></span> Phone: <span class="p"><</span><span class="nt">span</span> <span class="na">property</span><span class="o">=</span><span class="s">"telephone"</span><span class="p">></span>(540) 961-4469<span class="p"></</span><span class="nt">span</span><span class="p">></span> <span class="linenos" data-line="7"></span> <span class="p"></</span><span class="nt">div</span><span class="p">></span> <span class="linenos" data-line="8"></span> <span class="p"><</span><span class="nt">div</span><span class="p">></span> <span class="linenos" data-line="9"></span> E-mail: <span class="p"><</span><span class="nt">a</span> <span class="na">property</span><span class="o">=</span><span class="s">"email"</span> <span class="na">href</span><span class="o">=</span><span class="s">"mailto:(your emailid)"</span><span class="p">></span>msporny@digitalbazaar(.)com<span class="p"></</span><span class="nt">a</span><span class="p">></span> <span class="linenos" data-line="10"></span> <span class="p"></</span><span class="nt">div</span><span class="p">></span> <span class="linenos" data-line="11"></span> <span class="p"><</span><span class="nt">div</span><span class="p">></span> <span class="linenos" data-line="12"></span> Links: <span class="p"><</span><span class="nt">a</span> <span class="na">property</span><span class="o">=</span><span class="s">"url"</span> <span class="na">href</span><span class="o">=</span><span class="s">"http://manu.sporny.org/"</span><span class="p">></span>Manu's homepage<span class="p"></</span><span class="nt">a</span><span class="p">></span> <span class="linenos" data-line="13"></span> <span class="p"></</span><span class="nt">div</span><span class="p">></span> <span class="linenos" data-line="14"></span><span class="p"></</span><span class="nt">div</span><span class="p">></span> </pre></div> <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=RDFa&action=edit&section=15" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Embedded_RDF" title="Embedded RDF">eRDF</a>, an alternative to RDFa (now obsolete)</li> <li><a href="/wiki/GRDDL" title="GRDDL">GRDDL</a>, a way to extract (annotated) data out of XHTML and <a href="/wiki/XML" title="XML">XML</a> documents and transform it into an RDF graph</li> <li><a href="/wiki/Microdata_(HTML)" title="Microdata (HTML)">Microdata</a> - another approach at embedding semantics in HTML using additional attributes</li> <li><a href="/wiki/Microformat" title="Microformat">Microformats</a>, a simplified approach to semantically annotate data in web pages</li> <li><a href="/wiki/Open_Graph_protocol" class="mw-redirect" title="Open Graph protocol">Open Graph protocol</a>, a way to use RDFa to integrate web pages into the Facebook social graph</li> <li><a href="/wiki/Schema.org" title="Schema.org">Schema.org</a>, search-engine supported schemas for structured data markup on web pages that can be expressed as RDFa</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=RDFa&action=edit&section=16" 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 reflist-columns references-column-width" style="column-width: 30em;"> <ol class="references"> <li id="cite_note-rdfa-primer-1"><span class="mw-cite-backlink">^ <a href="#cite_ref-rdfa-primer_1-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-rdfa-primer_1-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><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><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.w3.org/TR/2015/NOTE-rdfa-primer-20150317/">"RDFa 1.1 Primer"</a> (3rd ed.). <a href="/wiki/World_Wide_Web_Consortium" title="World Wide Web Consortium">W3C</a>. 17 March 2015<span class="reference-accessdate">. Retrieved <span class="nowrap">2016-09-02</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=RDFa+1.1+Primer&rft.edition=3rd&rft.pub=W3C&rft.date=2015-03-17&rft_id=https%3A%2F%2Fwww.w3.org%2FTR%2F2015%2FNOTE-rdfa-primer-20150317%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3ARDFa" class="Z3988"></span></span> </li> <li id="cite_note-rdfa_wiki-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-rdfa_wiki_2-0">^</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://rdfa.info/">"RDFa / Tools"</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=RDFa+%2F+Tools&rft_id=http%3A%2F%2Frdfa.info%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3ARDFa" class="Z3988"></span></span> </li> <li id="cite_note-xhtml_and_rdf_note1-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-xhtml_and_rdf_note1_3-0">^</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://www.w3.org/MarkUp/2004/02/xhtml-rdf.html">"XHTML and RDF W3C Note 14 February 2004"</a>. <a href="/wiki/World_Wide_Web_Consortium" title="World Wide Web Consortium">World Wide Web Consortium</a>. 2004-02-14<span class="reference-accessdate">. Retrieved <span class="nowrap">2007-12-27</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=XHTML+and+RDF+W3C+Note+14+February+2004&rft.pub=World+Wide+Web+Consortium&rft.date=2004-02-14&rft_id=http%3A%2F%2Fwww.w3.org%2FMarkUp%2F2004%2F02%2Fxhtml-rdf.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ARDFa" 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 class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.w3.org/2001/sw/interest/">"W3C Semantic Web Interest Group (SWIG)"</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=W3C+Semantic+Web+Interest+Group+%28SWIG%29&rft_id=http%3A%2F%2Fwww.w3.org%2F2001%2Fsw%2Finterest%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3ARDFa" class="Z3988"></span></span> </li> <li id="cite_note-xhtml_and_rdf_note2-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-xhtml_and_rdf_note2_5-0">^</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://www.xml.com/pub/a/2004/03/03/deviant.html">"Semantic Web Interest Group"</a>. <i>www.xml.com</i>. 2004-03-03<span class="reference-accessdate">. Retrieved <span class="nowrap">2007-12-27</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=www.xml.com&rft.atitle=Semantic+Web+Interest+Group&rft.date=2004-03-03&rft_id=http%3A%2F%2Fwww.xml.com%2Fpub%2Fa%2F2004%2F03%2F03%2Fdeviant.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ARDFa" class="Z3988"></span></span> </li> <li id="cite_note-xhtml_2_wd_6-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-xhtml_2_wd_6_6-0">^</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://www.w3.org/TR/2004/WD-xhtml2-20040722/mod-metaAttributes.html#s_metaAttributesmodule">"XHTML 2.0 W3C Working Draft 22 July 2004, 19. XHTML Metainformation Attributes Module"</a>. <a href="/wiki/World_Wide_Web_Consortium" title="World Wide Web Consortium">World Wide Web Consortium</a>. 2004-07-22<span class="reference-accessdate">. Retrieved <span class="nowrap">2007-10-06</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=XHTML+2.0+W3C+Working+Draft+22+July+2004%2C+19.+XHTML+Metainformation+Attributes+Module&rft.pub=World+Wide+Web+Consortium&rft.date=2004-07-22&rft_id=http%3A%2F%2Fwww.w3.org%2FTR%2F2004%2FWD-xhtml2-20040722%2Fmod-metaAttributes.html%23s_metaAttributesmodule&rfr_id=info%3Asid%2Fen.wikipedia.org%3ARDFa" class="Z3988"></span></span> </li> <li id="cite_note-timelinehistory-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-timelinehistory_7-0">^</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="https://web.archive.org/web/20130424125723/http://www.dblab.ntua.gr/~bikakis/XML%20and%20Semantic%20Web%20W3C%20Standards%20Timeline-History.pdf">"XML and Semantic Web W3C Standards Timeline"</a> <span class="cs1-format">(PDF)</span>. Archived from <a rel="nofollow" class="external text" href="http://www.dblab.ntua.gr/~bikakis/XML%20and%20Semantic%20Web%20W3C%20Standards%20Timeline-History.pdf">the original</a> <span class="cs1-format">(PDF)</span> on 2013-04-24<span class="reference-accessdate">. Retrieved <span class="nowrap">2013-06-28</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=XML+and+Semantic+Web+W3C+Standards+Timeline&rft_id=http%3A%2F%2Fwww.dblab.ntua.gr%2F~bikakis%2FXML%2520and%2520Semantic%2520Web%2520W3C%2520Standards%2520Timeline-History.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3ARDFa" class="Z3988"></span></span> </li> <li id="cite_note-rdfa_1-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-rdfa_1_8-0">^</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://www.w3.org/MarkUp/2004/rdf-a.html">"RDF/A Syntax: A collection of attributes for layering RDF on XML languages"</a>. 2004-10-11<span class="reference-accessdate">. Retrieved <span class="nowrap">2009-05-14</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=RDF%2FA+Syntax%3A+A+collection+of+attributes+for+layering+RDF+on+XML+languages&rft.date=2004-10-11&rft_id=http%3A%2F%2Fwww.w3.org%2FMarkUp%2F2004%2Frdf-a.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ARDFa" class="Z3988"></span></span> </li> <li id="cite_note-rdfa_modules_ed-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-rdfa_modules_ed_9-0">^</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://www.w3.org/MarkUp/2007/ED-xhtml-rdfa-20070402">"XHTML RDFa Modules, Modules to support RDF annotation of elements, W3C Editor's Draft 2 April 2007"</a>. <a href="/wiki/World_Wide_Web_Consortium" title="World Wide Web Consortium">World Wide Web Consortium</a>. 2007-04-02<span class="reference-accessdate">. Retrieved <span class="nowrap">2007-10-06</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=XHTML+RDFa+Modules%2C+Modules+to+support+RDF+annotation+of+elements%2C+W3C+Editor%27s+Draft+2+April+2007&rft.pub=World+Wide+Web+Consortium&rft.date=2007-04-02&rft_id=http%3A%2F%2Fwww.w3.org%2FMarkUp%2F2007%2FED-xhtml-rdfa-20070402&rfr_id=info%3Asid%2Fen.wikipedia.org%3ARDFa" class="Z3988"></span></span> </li> <li id="cite_note-xhtml_rdfa_1_examples-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-xhtml_rdfa_1_examples_10-0">^</a></b></span> <span class="reference-text">For examples of this, see: <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20071011062935/http://joost.com/09400ax">"CBS: NCIS - Joost Link"</a>. Archived from <a rel="nofollow" class="external text" href="http://www.joost.com/09400ax">the original</a> on 2007-10-11<span class="reference-accessdate">. Retrieved <span class="nowrap">2007-10-06</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=CBS%3A+NCIS+-+Joost+Link&rft_id=http%3A%2F%2Fwww.joost.com%2F09400ax&rfr_id=info%3Asid%2Fen.wikipedia.org%3ARDFa" class="Z3988"></span> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20071214081908/http://weborganics.co.uk/files/hAudio-RDFa.xhtml">"WebOrganics :: HAudio RDFa"</a>. Archived from <a rel="nofollow" class="external text" href="http://weborganics.co.uk/files/hAudio-RDFa.xhtml">the original</a> on 2007-12-14<span class="reference-accessdate">. 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Retrieved <span class="nowrap">2016-09-02</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=RDF%2FA+Primer+1.0&rft.pub=W3C&rft.date=2006-03-10&rft_id=https%3A%2F%2Fwww.w3.org%2FTR%2F2006%2FWD-xhtml-rdfa-primer-20060310%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3ARDFa" class="Z3988"></span></span> </li> <li id="cite_note-RDFa2008-16"><span class="mw-cite-backlink"><b><a href="#cite_ref-RDFa2008_16-0">^</a></b></span> <span class="reference-text">"RDFa in XHTML: Syntax and Processing - A collection of attributes and processing rules for extending XHTML to support RDF", W3C Recommendation 14 October 2008. <a rel="nofollow" class="external free" href="http://www.w3.org/TR/2008/REC-rdfa-syntax-20081014/">http://www.w3.org/TR/2008/REC-rdfa-syntax-20081014/</a></span> </li> <li id="cite_note-html-rdfa-17"><span class="mw-cite-backlink"><b><a href="#cite_ref-html-rdfa_17-0">^</a></b></span> <span class="reference-text">"HTML+RDFa 1.1 - Support for RDFa in HTML4 and HTML5", W3C Recommendation 22 August 2013. <a rel="nofollow" class="external free" href="http://www.w3.org/TR/html-rdfa/">http://www.w3.org/TR/html-rdfa/</a></span> </li> <li id="cite_note-rdfa-core-18"><span class="mw-cite-backlink"><b><a href="#cite_ref-rdfa-core_18-0">^</a></b></span> <span class="reference-text">"RDFa Core 1.1 - Third Edition - Syntax and processing rules for embedding RDF through attribute", W3C Recommendation 17 March 2015. <a rel="nofollow" class="external free" href="https://www.w3.org/TR/2015/REC-rdfa-core-20150317/">https://www.w3.org/TR/2015/REC-rdfa-core-20150317/</a></span> </li> <li id="cite_note-RDFaLite1.0-19"><span class="mw-cite-backlink"><b><a href="#cite_ref-RDFaLite1.0_19-0">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.w3.org/TR/2011/WD-rdfa-lite-20111208/">first draft 1.1</a>.</span> </li> <li id="cite_note-RDFaLite1.1-20"><span class="mw-cite-backlink">^ <a href="#cite_ref-RDFaLite1.1_20-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-RDFaLite1.1_20-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-RDFaLite1.1_20-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text">"RDFa Lite 1.1, W3C Recommendation 07 June 2012. <a rel="nofollow" class="external free" href="http://www.w3.org/TR/rdfa-lite/">http://www.w3.org/TR/rdfa-lite/</a> (<a rel="nofollow" class="external text" href="http://www.w3.org/TR/2015/REC-rdfa-lite-20150210/">second edition at 2015</a>)</span> </li> <li id="cite_note-21"><span class="mw-cite-backlink"><b><a href="#cite_ref-21">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.w3.org/html/wg/tracker/issues/76">Final W3C position</a> (ISSUE-76), establishing that Microdata syntax simply duplicates what RDFa Lite already does.</span> </li> <li id="cite_note-22"><span class="mw-cite-backlink"><b><a href="#cite_ref-22">^</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://manu.sporny.org/2012/mythical-differences">"Mythical Differences: RDFa Lite vs. Microdata - 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Retrieved <span class="nowrap">2019-01-09</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=section+3.1%2C+%22Extraction+Results+from+the+November+2017+Common+Crawl+Corpus%22&rft.atitle=Web+Data+Commons+%E2%80%93+RDFa%2C+Microdata%2C+and+Microformat+Data+Sets&rft.date=2017&rft_id=http%3A%2F%2Fwebdatacommons.org%2Fstructureddata%2Findex.html%23toc2&rfr_id=info%3Asid%2Fen.wikipedia.org%3ARDFa" class="Z3988"></span></span> </li> <li id="cite_note-27"><span class="mw-cite-backlink"><b><a href="#cite_ref-27">^</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://aksw.org/Projects/RDFaCE">"RDFaCE — Agile Knowledge Engineering and Semantic Web (AKSW)"</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=RDFaCE+%E2%80%94+Agile+Knowledge+Engineering+and+Semantic+Web+%28AKSW%29&rft_id=http%3A%2F%2Faksw.org%2FProjects%2FRDFaCE&rfr_id=info%3Asid%2Fen.wikipedia.org%3ARDFa" class="Z3988"></span></span> </li> <li id="cite_note-28"><span class="mw-cite-backlink"><b><a href="#cite_ref-28">^</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://aksw.org/Projects/RDFaCE">"RDFaCE — Agile Knowledge Engineering and Semantic Web (AKSW)"</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=RDFaCE+%E2%80%94+Agile+Knowledge+Engineering+and+Semantic+Web+%28AKSW%29&rft_id=http%3A%2F%2Faksw.org%2FProjects%2FRDFaCE&rfr_id=info%3Asid%2Fen.wikipedia.org%3ARDFa" class="Z3988"></span></span> </li> <li id="cite_note-29"><span class="mw-cite-backlink"><b><a href="#cite_ref-29">^</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://code.google.com/p/autometa/">"Google Code Archive - Long-term storage for Google Code Project Hosting"</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Google+Code+Archive+-+Long-term+storage+for+Google+Code+Project+Hosting.&rft_id=http%3A%2F%2Fcode.google.com%2Fp%2Fautometa%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3ARDFa" class="Z3988"></span></span> </li> <li id="cite_note-rdfa_initial_context-30"><span class="mw-cite-backlink"><b><a href="#cite_ref-rdfa_initial_context_30-0">^</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://www.w3.org/2011/rdfa-context/rdfa-1.1">"RDFa Core Initial Context - Vocabulary Prefixes"</a>. <a href="/wiki/World_Wide_Web_Consortium" title="World Wide Web Consortium">World Wide Web Consortium</a>. 2012-05-27<span class="reference-accessdate">. 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Retrieved <span class="nowrap">19 January</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=The+Seo+Today&rft.atitle=Person+Schema+in+RDFa&rft.date=2023-01-19&rft.aulast=Murari&rft.aufirst=Krishna&rft_id=https%3A%2F%2Fwww.theseotoday.com%2F2023%2F01%2Fschema-markup-guide.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ARDFa" class="Z3988"></span></span> </li> </ol></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=RDFa&action=edit&section=17" 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="http://www.w3.org/TR/rdfa-primer/">RDFa Primer</a></li> <li><a rel="nofollow" class="external text" href="http://www.w3.org/2006/07/SWD/wiki/hGRDDL_Example">hGRDDL</a></li> <li><a rel="nofollow" class="external text" href="http://www.standards-schmandards.com/2007/rdfa-and-accessibility/">RDFa – Implications for Accessibility</a></li> <li><a rel="nofollow" class="external text" href="https://www.youtube.com/watch?v=mxE3FeOyS-E">Mark Birbeck presenting RDFa at Google in May 2008</a>. 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style="width:1%">Background</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Database" title="Database">Databases</a></li> <li><a href="/wiki/Hypertext" title="Hypertext">Hypertext</a></li> <li><a href="/wiki/Internet" title="Internet">Internet</a></li> <li><a href="/wiki/Ontology_(computer_science)" class="mw-redirect" title="Ontology (computer science)">Ontologies</a></li> <li><a href="/wiki/Semantics_(computer_science)" title="Semantics (computer science)">Semantics</a></li> <li><a href="/wiki/Semantic_network" title="Semantic network">Semantic networks</a></li> <li><a href="/wiki/World_Wide_Web" title="World Wide Web">World Wide Web</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Sub-topics</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a 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title="Description logic">Description logic</a></li> <li><a href="/wiki/Folksonomy" title="Folksonomy">Folksonomy</a></li> <li><a href="/wiki/Geotagging" title="Geotagging">Geotagging</a></li> <li><a href="/wiki/Information_architecture" title="Information architecture">Information architecture</a></li> <li><a href="/wiki/IXBRL" class="mw-redirect" title="IXBRL">iXBRL</a></li> <li><a href="/wiki/Knowledge_extraction" title="Knowledge extraction">Knowledge extraction</a></li> <li><a href="/wiki/Knowledge_management" title="Knowledge management">Knowledge management</a></li> <li><a href="/wiki/Knowledge_representation_and_reasoning" title="Knowledge representation and reasoning">Knowledge representation and reasoning</a></li> <li><a href="/wiki/Library_2.0" title="Library 2.0">Library 2.0</a></li> <li><a href="/wiki/Digital_library" title="Digital library">Digital library</a></li> <li><a href="/wiki/Digital_humanities" title="Digital humanities">Digital humanities</a></li> <li><a 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href="/wiki/HTTP" title="HTTP">HTTP</a></li> <li><a href="/wiki/Internationalized_Resource_Identifier" title="Internationalized Resource Identifier">IRI</a> <ul><li><small><a href="/wiki/Uniform_Resource_Identifier" title="Uniform Resource Identifier">URI</a></small></li></ul></li> <li><a href="/wiki/Resource_Description_Framework" title="Resource Description Framework">RDF</a> <ul><li><small><a href="/wiki/Semantic_triple" title="Semantic triple">triples</a></small></li> <li><small><a href="/wiki/RDF/XML" title="RDF/XML">RDF/XML</a></small></li> <li><small><a href="/wiki/JSON-LD" title="JSON-LD">JSON-LD</a></small></li> <li><small><a href="/wiki/Turtle_(syntax)" title="Turtle (syntax)">Turtle</a></small></li> <li><small><a href="/wiki/TriG_(syntax)" title="TriG (syntax)">TriG</a></small></li> <li><small><a href="/wiki/Notation3" title="Notation3">Notation3</a></small></li> <li><small><a href="/wiki/N-Triples" title="N-Triples">N-Triples</a></small></li> <li><small><a href="/wiki/TriX_(serialization_format)" title="TriX (serialization format)">TriX</a> (no W3C standard)</small></li></ul></li> <li><a href="/wiki/Research_Resource_Identifier" class="mw-redirect" title="Research Resource Identifier">RRID</a></li> <li><a href="/wiki/SPARQL" title="SPARQL">SPARQL</a></li> <li><a href="/wiki/XML" title="XML">XML</a></li> <li><a href="/wiki/Semantic_HTML" title="Semantic HTML">Semantic HTML</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Schemas, ontologies and rules</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/Common_Logic" title="Common Logic">Common Logic</a></li> <li><a href="/wiki/Web_Ontology_Language" title="Web Ontology Language">OWL</a></li> <li><a href="/wiki/RDF_Schema" title="RDF Schema">RDFS</a></li> <li><a href="/wiki/Rule_Interchange_Format" title="Rule Interchange Format">Rule Interchange Format</a></li> <li><a href="/wiki/Semantic_Web_Rule_Language" title="Semantic Web Rule Language">Semantic Web Rule Language</a></li> <li><a href="/w/index.php?title=Application-Level_Profile_Semantics_(ALPS)&action=edit&redlink=1" class="new" title="Application-Level Profile Semantics (ALPS) (page does not exist)">ALPS</a></li> <li><a href="/wiki/SHACL" title="SHACL">SHACL</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Semantic annotation</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/Embedded_RDF" title="Embedded RDF">eRDF</a></li> <li><a href="/wiki/GRDDL" title="GRDDL">GRDDL</a></li> <li><a href="/wiki/Microdata_(HTML)" title="Microdata (HTML)">Microdata</a></li> <li><a href="/wiki/Microformat" title="Microformat">Microformats</a></li> <li><a class="mw-selflink selflink">RDFa</a></li> <li><a href="/wiki/SAWSDL" title="SAWSDL">SAWSDL</a></li> 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