Microdata (HTML): Difference between revisions

Revision as of 05:40, 9 October 2015

Revision as of 00:27, 25 October 2015

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'''Microdata''' is a [[WHATWG]] [[HTML]] specification used to nest [[metadata]] within existing content on web pages.<ref name="WHATWG"/> [[Search engines]], [[web crawlers]], and [[Web browser|browsers]] 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 this structured data because it allows search engines to understand the information on web pages and provide more relevant [[Search engine results page|results]] to users.<ref>[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)]</ref><ref>Schema.org http://schema.org/</ref> Microdata uses a supporting vocabulary to describe an item and name-value pairs to assign values to its properties.<ref name="DIVE"/> Microdata is an attempt to provide a simpler way of annotating [[HTML element]]s with machine-readable tags than the similar approaches of using [[RDFa]] and [[microformat]]s.

The W3C HTML Working Group failed to find an editor for the specification and itterminated isits duedevelopment to be published only aswith a 'Note'.<ref>https://lists.w3.org/Archives/Public/public-html-admin/2013Oct/0018.html</ref><ref>http://www.w3.org/TR/microdata/</ref>

== Vocabularies ==

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== Localization ==

{{cleanup|reason=bad translation from the Russian|date=January 2015}}

In some cases, search engines covering specific regions may provide locally-specific extensions of microdata. For example [[Yandex]], a major search engine in Russia, supports [[microformats]] such as [[hCard]] (company contact information), [[hRecipe]] (food recipe), [[hReview]] (market reviews) and [[hProduct]] (product data) and provides its own format for definition of the terms and encyclopedic articles. This extension was made in order to get rid of problems with transliteration between the Cyrillic and Latin alphabets. Due to this implementation of additional marking parameters and routine use of Schema's vocabulary <ref name="AcademicYan"/> the indexation of information in Russian-language web-pages became considerably more successful.

== Global attributes ==

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addressRegion = Georgia

The same machine-readable terms can be used not only in HTML5HTML Microdata, but also in other annotations such as [[RDFa]] or [[JSON-LD]] in the markup, or in an external [[Resource Description Framework|RDF]] file in a serialization such as [[RDF/XML]], [[Notation3]], or [[Turtle (syntax)|Turtle]].

== Support ==

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== References ==

{{Reflist|30em|refs=

<ref name="WHATWG">[http://www.whatwg.org/specs/web-apps/current-work/multipage/microdata.html ''Microdata &mdash; HTML5HTML Draft Standard'']</ref>

<ref name="AcademicYan">[http://www.academia.edu/6732371/Untangling_the_Semantic_Web_Microdata_use_in_Russian_video_content_delivery_sites.html ''Semantic markup deployment in Russia '']</ref>

<ref name="GoogleCan">[http://www.google.com/support/webmasters/bin/answer.py?answer=99170 ''Rich Snippet display clarification'']</ref>

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== External links ==

* {{citation |url=https://html.spec.whatwg.org/multipage/microdata.html |title=Microdata &mdash; HTML5HTML Draft Standard |publisher=[[Web Hypertext Application Technology Working Group|WHATWG]]}}

* [{{citation |url=http://www.w3.org/TR/microdata/ |title=W3C HTML Microdata] W3C Working Group Note |publisher=[[W3C]]}}

* {{citation |url=http://blog.whatwg.org/usability-testing-html5 |title=Usability testing HTML5 |date=2009-10-04}}, about how some of the design decisions for microdata were made

* {{citation |url=http://ajaxian.com/archives/hixie-discusses-the-addition-of-html5-microdata |title=Hixie discusses the addition of HTML5 "microdata" |date=2009-05-11 |first=Dion |last=Almaer |publisher=Ajaxian}}