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<title>Microdata (HTML)</title>

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Microdata (HTML)

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</style><div role="note" class="hatnote navigation-not-searchable">For other uses, see <a href="Microdata_(disambiguation)" class="mw-redirect mw-disambig" title="Microdata (disambiguation)">Microdata (disambiguation)</a>.</div>

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</style><table class="sidebar nomobile nowraplinks"><tbody><tr><th class="sidebar-title"><a href="HTML" title="HTML">HTML</a></th></tr><tr><th class="sidebar-heading">

HTML and variants</th></tr><tr><td class="sidebar-content hlist">

<ul><li><a href="Dynamic_HTML" title="Dynamic HTML">Dynamic HTML</a></li>

<li><a href="XHTML" title="XHTML">XHTML</a>

<ul><li><a href="XHTML_Basic" title="XHTML Basic">Basic</a></li>

<li><a href="XHTML_Mobile_Profile" title="XHTML Mobile Profile">Mobile Profile</a></li></ul></li></ul></td>

</tr><tr><th class="sidebar-heading">

HTML elements and attributes</th></tr><tr><td class="sidebar-content hlist">

<ul><li><a href="HTML_element" title="HTML element">HTML element</a>

<ul><li><a href="Article_element" title="Article element">article</a></li>

<li><a href="HTML_audio" title="HTML audio">audio</a></li>

<li><a href="Blink_element" title="Blink element">blink</a></li>

<li><a href="Canvas_element" title="Canvas element">canvas</a></li>

<li><a href="Marquee_element" title="Marquee element">marquee</a></li>

<li><a href="HTML_video" title="HTML video">video</a></li></ul></li>

<li><a href="HTML_attribute" title="HTML attribute">HTML attribute</a>

<ul><li><a href="Alt_attribute" title="Alt attribute">alt attribute</a></li></ul></li>

<li><a href="Frame_(World_Wide_Web)" title="Frame (World Wide Web)">HTML frame</a></li></ul></td>

</tr><tr><th class="sidebar-heading">

Editing</th></tr><tr><td class="sidebar-content hlist">

<ul><li><a href="HTML_editor" title="HTML editor">HTML editor</a></li>

<li><a href="Text_editor" title="Text editor">Text editor</a></li></ul></td>

</tr><tr><th class="sidebar-heading">

Character encodings and language</th></tr><tr><td class="sidebar-content hlist">

<ul><li><a href="Character_encodings_in_HTML" title="Character encodings in HTML">Character encodings</a></li>

<li><a href="List_of_XML_and_HTML_character_entity_references" title="List of XML and HTML character entity references">Character entity references (amed characters)</a></li>

<li><a href="Unicode_and_HTML" title="Unicode and HTML">Unicode</a></li>

<li><a href="Language_code" title="Language code">Language code</a></li></ul></td>

</tr><tr><th class="sidebar-heading">

Document and browser models</th></tr><tr><td class="sidebar-content hlist">

<ul><li><a href="Document_Object_Model" title="Document Object Model">Document Object Model</a></li>

<li><a href="Browser_Object_Model" title="Browser Object Model">Browser Object Model</a></li>

<li><a href="Style_sheet_(web_development)" title="Style sheet (web development)">Style sheets</a>

<li><a href="Font_family_(HTML)" title="Font family (HTML)">Font family</a></li>

<li><a href="Web_colors" title="Web colors">Web colors</a></li></ul></td>

</tr><tr><th class="sidebar-heading">

Client-side scripting and APIs</th></tr><tr><td class="sidebar-content hlist">

<ul><li><a href="JavaScript" title="JavaScript">JavaScript</a>

<ul><li><a href="WebCL" title="WebCL">WebCL</a></li>

</tr><tr><th class="sidebar-heading">

Graphics and Web3D technology</th></tr><tr><td class="sidebar-content hlist">

<ul><li><a href="WebGL" title="WebGL">WebGL</a></li>

<li><a href="WebGPU" title="WebGPU">WebGPU</a></li>

<li><a href="WebXR" title="WebXR">WebXR</a></li></ul></li>

<ul><li><a href="W3C_Markup_Validation_Service" title="W3C Markup Validation Service">Validator</a></li></ul></li>

<li><a href="WHATWG" title="WHATWG">WHATWG</a></li>

<li><a href="Quirks_mode" title="Quirks mode">Quirks mode</a></li>

<li><a href="Web_storage" title="Web storage">Web storage</a></li>

<li><a href="Browser_engine" title="Browser engine">Rendering engine</a></li></ul></td>

</tr><tr><th class="sidebar-heading">

Comparisons</th></tr><tr><td class="sidebar-content hlist">

<ul><li><a href="Comparison_of_document_markup_languages" title="Comparison of document markup languages">Document markup languages</a></li>

<li><a href="Comparison_of_browser_engines" title="Comparison of browser engines">Comparison of browser engines</a></li></ul></td>

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Microdata is a <a href="WHATWG" title="WHATWG">WHATWG</a> <a href="HTML" title="HTML">HTML</a> specification used to nest <a href="Metadata" title="Metadata">metadata</a> within existing content on web pages.<a href="#cite_note-WHATWG-1">[1]</a> <a href="Search_engines" class="mw-redirect" title="Search engines">Search engines</a>, <a href="Web_crawlers" class="mw-redirect" title="Web crawlers">web crawlers</a>, and <a href="Web_browser" title="Web browser">browsers</a> can extract and process Microdata from a web page and use it to provide a richer browsing experience for users. Search engines benefit greatly from direct access to Microdata because it allows them to understand the information on web pages and provide more relevant <a href="Search_engine_results_page" title="Search engine results page">results</a> to users.<a href="#cite_note-2">[2]</a><a href="#cite_note-3">[3]</a> Microdata uses a supporting vocabulary to describe an item and name-value pairs to assign values to its properties.<a href="#cite_note-DIVE-4">[4]</a> Microdata is an attempt to provide a simpler way of annotating <a href="HTML_element" title="HTML element">HTML elements</a> with machine-readable tags than the similar approaches of using <a href="RDFa" title="RDFa">RDFa</a> and <a href="Microformat" title="Microformat">microformats</a>.

In 2013, because the W3C HTML Working Group failed to find someone to serve as an editor for the Microdata HTML specification, its development was terminated with a 'Note'.<a href="#cite_note-5">[5]</a><a href="#cite_note-6">[6]</a> However, since that time, two new editors were selected, and five newer versions of the working draft have been published,<a href="#cite_note-7">[7]</a><a href="#cite_note-8">[8]</a><a href="#cite_note-9">[9]</a><a href="#cite_note-:0-10">[10]</a> the most recent being Working Draft 26 April 2018.<a href="#cite_note-:0-10">[10]</a>

<div class="mw-heading mw-heading2"><h2 id="Vocabularies">Vocabularies</h2></div>

Microdata vocabularies do not provide the <a href="Semantics" title="Semantics">semantics</a>, or meaning of an Item.<a href="#cite_note-11">[11]</a> Web developers can design a custom vocabulary or use vocabularies available on the web. A collection of commonly used markup vocabularies are provided by <a href="Schema.org" title="Schema.org">Schema.org</a> schemas which include: Person, "Place", Event, Organization, Product, Review, Review-aggregate, Breadcrumb, Offer, Offer-aggregate. The website schema.org was established by search engine operators like <a href="Google" title="Google">Google</a>, <a href="Microsoft" title="Microsoft">Microsoft</a>, <a href="Yahoo!" class="mw-redirect" title="Yahoo!">Yahoo!</a>, and <a href="Yandex" title="Yandex">Yandex</a>, which use microdata markup to improve search results.<a href="#cite_note-12">[12]</a>: 85

For some purposes, an ad-hoc vocabulary is adequate. For others, a vocabulary will need to be designed. Where possible, authors are encouraged to re-use existing vocabularies, as this makes content re-use easier.<a href="#cite_note-WHATWG-1">[1]</a>

<div class="mw-heading mw-heading2"><h2 id="Localization">Localization</h2></div>

In some cases, search engines covering specific regions may provide locally-specific extensions of microdata. For example, <a href="Yandex" title="Yandex">Yandex</a>, a major search engine in Russia, supports <a href="Microformats" class="mw-redirect" title="Microformats">microformats</a> such as <a href="HCard" title="HCard">hCard</a> (company contact information), <a href="HRecipe" title="HRecipe">hRecipe</a> (food recipe), <a href="HReview" title="HReview">hReview</a> (market reviews) and <a href="HProduct" title="HProduct">hProduct</a> (product data) and provides its own format for definition of the terms and encyclopedic articles. This extension was made in order to solve <a href="Transliteration" title="Transliteration">transliteration</a> problems between the Cyrillic and Latin alphabets. After the implementation of additional parameters from Schema's vocabulary,<a href="#cite_note-AcademicYan-13">[13]</a> indexation of information in Russian-language web-pages became more successful.

<div class="mw-heading mw-heading2"><h2 id="Global_attributes">Global attributes</h2></div>

<ul><li><code>itemscope</code> – Creates the Item and indicates that descendants of this <a href="HTML_element" title="HTML element">element</a> contain information about it.<a href="#cite_note-WHATWG-1">[1]</a></li>

<li><code>itemtype</code> – A valid URL of a vocabulary that describes the item and its properties' context.</li>

<li><code>itemid</code> – Indicates a unique identifier of the item.</li>

<li><code>itemprop</code> – Indicates that its containing tag holds the value of the specified item property. The property's name and value context are described by the item's vocabulary. Properties values usually consist of string values, but can also use URLs using the <code>a</code> element and its <code>href</code> attribute, the <code>img</code> element and its <code>src</code> attribute, or other elements that link to or embed external resources.<a href="#cite_note-WHATWG-1">[1]</a></li>

<li><code>itemref</code> – Properties that are not descendants of the element with the <code>itemscope</code> attribute can be associated with the item using this attribute. Provides a list of element IDs (not <code>itemid</code>s) with additional properties elsewhere in the document.<a href="#cite_note-WHATWG-1">[1]</a></li>

<li><code>datetime</code> – Indicates date or duration as specified by <a href="ISO_8601" title="ISO 8601">ISO 8601</a> standard.</li></ul>

<div class="mw-heading mw-heading2"><h2 id="Example">Example</h2></div>

The following HTML5 markup may be found on a typical “About” page containing information about a person:

<div class="mw-highlight mw-highlight-lang-html mw-content-ltr" dir="ltr"><pre><div> Hello, my name is John Doe, I am a graduate research assistant at

the University of Dreams.

My friends call me Johnny.

You can visit my homepage at <a href="http://www.example.com/~JohnnyD">www.example.com/~JohnnyD</a>.

I live at 1234 Peach Drive, Warner Robins, Georgia.</div>

</pre></div>

Here is the same markup with added <a href="Schema.org" title="Schema.org">Schema.org</a><a href="#cite_note-14">[14]</a><a href="#cite_note-15">[15]</a><a href="#cite_note-16">[16]</a> Microdata:

Hello, my name is

<span itemprop="name">John Doe</span>,

I am a

<span itemprop="jobTitle">graduate research assistant</span>

at the

<span itemprop="affiliation">University of Dreams</span>.

My friends call me

<span itemprop="additionalName">Johnny</span>.

You can visit my homepage at

<a href="http://www.example.com/~JohnnyD" itemprop="url">www.example.com/~JohnnyD</a>.

I live at

<span itemprop="streetAddress">1234 Peach Drive</span>,

<span itemprop="addressLocality">Warner Robins</span>,

<span itemprop="addressRegion">Georgia</span>.

</div>

</pre></div>

As the above example shows, Microdata items can be nested. In this case, an item of type <a rel="nofollow" class="external free" href="http://schema.org/PostalAddress">http://schema.org/PostalAddress</a> is nested inside an item of type <a rel="nofollow" class="external free" href="http://schema.org/Person">http://schema.org/Person</a>.

The following text shows how Google parses the Microdata from the above example code. Developers can test pages containing Microdata using Google's Rich Snippet Testing Tool.<a href="#cite_note-GoogleRS-17">[17]</a>

<pre>Item

Type: <a rel="nofollow" class="external free" href="http://schema.org/Person">http://schema.org/Person</a>

name = John Doe

jobTitle = graduate research assistant

affiliation = University of Dreams

additionalName = Johnny

url = http://www.example.com/~JohnnyD

address = Item(1)

Item 1

Type: <a rel="nofollow" class="external free" href="http://schema.org/PostalAddress">http://schema.org/PostalAddress</a>

streetAddress = 1234 Peach Drive

addressLocality = Warner Robins

addressRegion = Georgia

</pre>

</div>

The same machine-readable terms can be used not only in HTML Microdata, but also in other annotations such as <a href="RDFa" title="RDFa">RDFa</a> or <a href="JSON-LD" title="JSON-LD">JSON-LD</a> in the markup, or in an external <a href="Resource_Description_Framework" title="Resource Description Framework">RDF</a> file in a serialization such as <a href="RDF/XML" title="RDF/XML">RDF/XML</a>, <a href="Notation3" title="Notation3">Notation3</a>, or <a href="Turtle_(syntax)" title="Turtle (syntax)">Turtle</a>.

<div class="mw-heading mw-heading2"><h2 id="Support">Support</h2></div>

<ul><li>Servers: <a href="Google" title="Google">Google</a> can<a href="#cite_note-GoogleCan-18">[18]</a> use microdata in its <a href="Search_engine_results_page" title="Search engine results page">result pages</a>.<a href="#cite_note-GoogleRS-17">[17]</a> It was the preferred snippet format for the <a href="Google%2B" title="Google+">Google+</a> social network.<a href="#cite_note-19">[19]</a></li>

<li>Browsers: As of July 2021, no major browser supports the Microdata <a href="Document_Object_Model" title="Document Object Model">DOM</a> <a href="API" title="API">API</a>.<a href="#cite_note-20">[20]</a> Opera supported it from 11.60 (released in 2011), but since removed its implementation.<a href="#cite_note-21">[21]</a> Firefox removed it in version 49.<a href="#cite_note-22">[22]</a></li></ul>

<ul><li><a href="Semantic_web" class="mw-redirect" title="Semantic web">Semantic web</a></li>

<li><a href="Microformat" title="Microformat">Microformat</a></li>

<li><a href="CP/LD" class="mw-redirect" title="CP/LD">CP/LD (Content Profile/Linked Document)</a></li>

<li><a href="Semantic_HTML" title="Semantic HTML">Semantic HTML</a></li>

<li><a href="Semantic_social_network" title="Semantic social network">Semantic social network</a></li></ul>

<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>

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</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.whatwg.org/specs/web-apps/current-work/multipage/microdata.html">"Microdata — HTML Draft Standard"</a>. Whatwg.org. Retrieved 2016-06-30.</cite>

</li>

<li id="cite_note-2"><a href="#cite_ref-2">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.lyquix.com/blog-and-news/microdata-the-future-of-search-engine-relevance-and-search-engine-optimization-seo">"MicroData - The Future of Search Engine Relevance and Optimization (SEO)"</a>. Lyquix.com. Retrieved 2016-06-30.</cite>

</li>

<li id="cite_note-3"><a href="#cite_ref-3">^</a> Schema.org <a rel="nofollow" class="external free" href="http://schema.org/">http://schema.org/</a>

</li>

<li id="cite_note-DIVE-4"><a href="#cite_ref-DIVE_4-0">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://diveintohtml5.info/extensibility.html">""Distributed," "Extensibility," And Other Fancy Words"</a>. Diveintohtml5.info. Retrieved 2016-06-30.</cite>

</li>

<li id="cite_note-5"><a href="#cite_ref-5">^</a> <cite id="CITEREFCotton2013" class="citation mailinglist cs1">Cotton, Paul (2 Oct 2013). <a rel="nofollow" class="external text" href="https://lists.w3.org/Archives/Public/public-html-admin/2013Oct/0018.html">"WG Decision to publish HTML Microdata as a WG Note"</a>. public-html-admin@w3.org (Mailing list). Retrieved 2016-06-30.</cite>

</li>

<li id="cite_note-6"><a href="#cite_ref-6">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.w3.org/TR/microdata/">"HTML Microdata"</a>. W3.org. 23 June 2014. Retrieved 2016-06-30.</cite>

</li>

<li id="cite_note-7"><a href="#cite_ref-7">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.w3.org/TR/2017/WD-microdata-20170504/">"HTML Microdata W3C First Public Working Draft 04 May 2017"</a>. World Wide Web Consortium (W3C). Retrieved 2017-09-06.</cite>

</li>

<li id="cite_note-8"><a href="#cite_ref-8">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.w3.org/TR/2017/WD-microdata-20170626/">"HTML Microdata W3C Working Draft 26 June 2017"</a>. World Wide Web Consortium (W3C). Retrieved 2017-09-06.</cite>

</li>

<li id="cite_note-9"><a href="#cite_ref-9">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.w3.org/TR/2017/WD-microdata-20171009/">"HTML Microdata W3C Working Draft 09 October 2017"</a>. World Wide Web Consortium (W3C). 9 October 2017. Retrieved 16 March 2018.</cite>

</li>

<li id="cite_note-:0-10">^ <a href="#cite_ref-:0_10-0">a</a> <a href="#cite_ref-:0_10-1">b</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.w3.org/TR/2017/WD-microdata-20171010/">"HTML Microdata W3C Working Draft 10 October 2017"</a>. World Wide Web Consortium (W3C). 10 October 2017. Retrieved 16 March 2018.</cite>

</li>

<li id="cite_note-11"><a href="#cite_ref-11">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://html.spec.whatwg.org/multipage/microdata.html">"HTML Standard"</a>. Web Hypertext Application Technology Working Group. Retrieved 30 December 2016.</cite>

</li>

<li id="cite_note-12"><a href="#cite_ref-12">^</a> <cite id="CITEREFMacDonald2014" class="citation book cs1">MacDonald, Matthew (2014). HTML5: The missing manual (2nd ed.). <a href="O'Reilly_and_Associates" class="mw-redirect" title="O'Reilly and Associates">O'Reilly and Associates</a>. <a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>978-1-4493-6326-0</bdi>.</cite>

</li>

<li id="cite_note-AcademicYan-13"><a href="#cite_ref-AcademicYan_13-0">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.academia.edu/6732371">"Semantic markup deployment in Russia"</a>. Academia.edu. Retrieved 2016-06-30.</cite>

</li>

<li id="cite_note-14"><a href="#cite_ref-14">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://schema.org/docs/documents.html">"Documentation"</a>. Schema.org. Retrieved 2016-06-30.</cite>

</li>

<li id="cite_note-15"><a href="#cite_ref-15">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://schema.org/docs/full.html">"Type Hierarchy"</a>. Schema.org. Retrieved 2016-06-30.</cite>

</li>

<li id="cite_note-16"><a href="#cite_ref-16">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20140921103224/http://schema.rdfs.org/all.ttl">"Schema.org Turtle RDFS Schema"</a>. Archived from <a rel="nofollow" class="external text" href="http://schema.rdfs.org/all.ttl">the original</a> on 2014-09-21. Retrieved 2013-05-29.</cite>

</li>

<li id="cite_note-GoogleRS-17">^ <a href="#cite_ref-GoogleRS_17-0">a</a> <a href="#cite_ref-GoogleRS_17-1">b</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://developers.google.com/structured-data/testing">"Rich snippets (microdata, microformats, RDFa)"</a>. Google Inc. 2016-05-17. Retrieved 2016-06-30.</cite>

</li>

<li id="cite_note-GoogleCan-18"><a href="#cite_ref-GoogleCan_18-0">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.google.com/support/webmasters/bin/answer.py?answer=99170">"Rich Snippet display clarification"</a>. 2016-06-22. Retrieved 2016-06-30.</cite>

</li>

<li id="cite_note-19"><a href="#cite_ref-19">^</a> <cite id="CITEREFGoogle_Webmasters_Channel2011" class="citation audio-visual cs1">Google Webmasters Channel (2011-12-06). <a rel="nofollow" class="external text" href="https://www.youtube.com/watch?v=4W8Ah394bH8">Types of Rich Snippets</a> (Video). <a rel="nofollow" class="external text" href="https://ghostarchive.org/varchive/youtube/20211215/4W8Ah394bH8">Archived</a> from the original on 2021-12-15. Retrieved 2016-06-30.</cite> <code class="cs1-code">{{cite AV media}}</code>: <code class="cs1-code">|author=</code> has generic name (help)

</li>

<li id="cite_note-20"><a href="#cite_ref-20">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://developer.mozilla.org/en-US/docs/Web/API/Microdata_DOM_API">"Microdata DOM API - Web APIs | MDN"</a>. developer.mozilla.org. Retrieved 2021-07-05.</cite>

</li>

<li id="cite_note-21"><a href="#cite_ref-21">^</a> <cite id="CITEREFOpera_Software_Documentation_Team2011" class="citation web cs1">Opera Software Documentation Team (2011-12-06). <a rel="nofollow" class="external text" href="https://web.archive.org/web/20141023082043/http://www.opera.com/docs/changelogs/windows/1160/">"Opera 11.60 for Windows changelog"</a>. Opera.com. Archived from <a rel="nofollow" class="external text" href="http://www.opera.com/docs/changelogs/windows/1160/">the original</a> on 2014-10-23. Retrieved 2016-06-30.</cite>

</li>

<li id="cite_note-22"><a href="#cite_ref-22">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://bugzilla.mozilla.org/show_bug.cgi?id=909633">"909633 - Remove HTML Microdata API"</a>. bugzilla.mozilla.org. Retrieved 2021-07-05.</cite>

</li>

</ol></div>

<div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2></div>

<ul><li><cite class="citation cs2"><a rel="nofollow" class="external text" href="https://html.spec.whatwg.org/multipage/microdata.html">Microdata — HTML Draft Standard</a>, <a href="Web_Hypertext_Application_Technology_Working_Group" class="mw-redirect" title="Web Hypertext Application Technology Working Group">WHATWG</a></cite></li>

<li><cite class="citation cs2"><a rel="nofollow" class="external text" href="https://www.w3.org/TR/microdata/">W3C HTML Microdata Working Group Note</a>, <a href="W3C" class="mw-redirect" title="W3C">W3C</a></cite></li>

<li><cite id="CITEREFAlmaer2009" class="citation cs2">Almaer, Dion (2009-05-11), <a rel="nofollow" class="external text" href="https://web.archive.org/web/20091212053447/http://ajaxian.com/archives/hixie-discusses-the-addition-of-html5-microdata">Hixie discusses the addition of HTML5 "microdata"</a>, Ajaxian, archived from <a rel="nofollow" class="external text" href="http://ajaxian.com/archives/hixie-discusses-the-addition-of-html5-microdata">the original</a> on 2009-12-12</cite></li>

<li><cite class="citation cs2"><a rel="nofollow" class="external text" href="http://www.data-vocabulary.org">HTML5 Microdata Specs</a>, Data-Vocabulary.org</cite></li></ul>

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</style></div><div role="navigation" class="navbox" aria-labelledby="Semantic_Web71" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Semantic_Web71" style="font-size:114%;margin:0 4em"><a href="Semantic_Web" title="Semantic Web">Semantic Web</a></div></th></tr><tr><th scope="row" class="navbox-group" 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="Database" title="Database">Databases</a></li>

<li><a href="Hypertext" title="Hypertext">Hypertext</a></li>

<li><a href="Internet" title="Internet">Internet</a></li>

<li><a href="Ontology_(information_science)" title="Ontology (information science)">Ontologies</a></li>

<li><a href="Semantics_(computer_science)" title="Semantics (computer science)">Semantics</a></li>

<li><a href="Semantic_network" title="Semantic network">Semantic networks</a></li>

<li><a href="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 href="Dataspaces" class="mw-redirect" title="Dataspaces">Dataspaces</a></li>

<li><a href="Hyperdata" title="Hyperdata">Hyperdata</a></li>

<li><a href="Linked_data" title="Linked data">Linked data</a></li>

<li><a href="Rule-based_system" title="Rule-based system">Rule-based systems</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Applications</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="Semantic_analytics" title="Semantic analytics">Semantic analytics</a></li>

<li><a href="Semantic_computing" title="Semantic computing">Semantic computing</a></li>

<li><a href="Semantic_mapper" title="Semantic mapper">Semantic mapper</a></li>

<li><a href="Semantic_matching" title="Semantic matching">Semantic matching</a></li>

<li><a href="Semantic_publishing" title="Semantic publishing">Semantic publishing</a></li>

<li><a href="Semantic_reasoner" title="Semantic reasoner">Semantic reasoner</a></li>

<li><a href="Semantic_search" title="Semantic search">Semantic search</a></li>

<li><a href="Semantic_service-oriented_architecture" title="Semantic service-oriented architecture">Semantic service-oriented architecture</a></li>

<li><a href="Semantic_wiki" title="Semantic wiki">Semantic wiki</a></li>

<li><a href="Solid_(web_decentralization_project)" title="Solid (web decentralization project)">Solid</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related 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 href="Collective_intelligence" title="Collective intelligence">Collective intelligence</a></li>

<li><a href="Description_logic" title="Description logic">Description logic</a></li>

<li><a href="Folksonomy" title="Folksonomy">Folksonomy</a></li>

<li><a href="Geotagging" title="Geotagging">Geotagging</a></li>

<li><a href="Information_architecture" title="Information architecture">Information architecture</a></li>

<li><a href="IXBRL" class="mw-redirect" title="IXBRL">iXBRL</a></li>

<li><a href="Knowledge_extraction" title="Knowledge extraction">Knowledge extraction</a></li>

<li><a href="Knowledge_management" title="Knowledge management">Knowledge management</a></li>

<li><a href="Knowledge_representation_and_reasoning" title="Knowledge representation and reasoning">Knowledge representation and reasoning</a></li>

<li><a href="Library_2.0" title="Library 2.0">Library 2.0</a></li>

<li><a href="Digital_library" title="Digital library">Digital library</a></li>

<li><a href="Digital_humanities" title="Digital humanities">Digital humanities</a></li>

<li><a href="Metadata" title="Metadata">Metadata</a></li>

<li><a href="Reference_(computer_science)" title="Reference (computer science)">References</a></li>

<li><a href="Topic_map" title="Topic map">Topic map</a></li>

<li><a href="Web_engineering" title="Web engineering">Web engineering</a></li>

<li><a href="Web_Science_Trust" title="Web Science Trust">Web Science Trust</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Standards</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Syntax and supporting technologies</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="Semantic_triple" title="Semantic triple">triples</a></li>

<li><a href="Turtle_(syntax)" title="Turtle (syntax)">Turtle</a></li>

<li><a href="Notation3" title="Notation3">Notation3</a></li>

<li><a href="N-Triples" title="N-Triples">N-Triples</a></li>

<li><a href="TriX_(serialization_format)" title="TriX (serialization format)">TriX</a> (no W3C standard)</li></ul></li>

<li><a href="SPARQL" title="SPARQL">SPARQL</a></li>

<li><a href="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="Common_Logic" title="Common Logic">Common Logic</a></li>

<li><a href="Rule_Interchange_Format" title="Rule Interchange Format">Rule Interchange Format</a></li>

<li><a href="Semantic_Web_Rule_Language" title="Semantic Web Rule Language">Semantic Web Rule Language</a></li>

<li><a href="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="COinS" title="COinS">COinS</a></li>

<li><a href="GRDDL" title="GRDDL">GRDDL</a></li>

<li><a href="Microformat" title="Microformat">Microformats</a></li>

<li><a href="SAWSDL" title="SAWSDL">SAWSDL</a></li>

<li><a href="Facebook_Platform" title="Facebook Platform">Facebook Platform</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Common vocabularies</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="BIBFRAME" title="BIBFRAME">BIBFRAME</a></li>

<li><a href="Dublin_Core" title="Dublin Core">Dublin Core</a></li>

<li><a href="Schema.org" title="Schema.org">Schema.org</a></li>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Microformat vocabularies</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="HAtom" title="HAtom">hAtom</a></li>

<li><a href="HCalendar" title="HCalendar">hCalendar</a></li>

<li><a href="HCard" title="HCard">hCard</a></li>

<li><a href="HProduct" title="HProduct">hProduct</a></li>

<li><a href="HRecipe" title="HRecipe">hRecipe</a></li>

<li><a href="HReview" title="HReview">hReview</a></li></ul>

</div></td></tr></tbody></table><div></div></td></tr></tbody></table></div></div><div><div class="zim-footer">

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