[10] [DFN[[[schema.org]]]] は、主要[[検索エンジン]][[事業者]]によって定義されている[[マイクロデータ]]の[[語彙]]です。

* 仕様書

[REFS[
- [1] [CITE[schema.org - Home]]
( ([TIME[2011-06-02 17:00:03 +09:00]] 版))
<http://schema.org/>
]REFS]

* 言語

[42] 
[[Webサイト]]に[[人間]]向けの説明がありますが、
ほかに、
[[機械可読]]な説明データファイルが提供されています [SRC[>>41]]。

[43] 
[CODE[rdfs:comment]]
に [[escaped markup]]
が入っている ([CODE[rdf:HTML]] では''ない''のに)
ような雑なデータですけどね。

[REFS[
- [41] [CITE@en[Developers - schema.org]], [TIME[2019-12-04 10:41:17 +09:00]] <https://schema.org/docs/developers.html>
]REFS]

[FIG(short list)[ [45] [[schema.org]]
- [CODE[https://schema.org/Action]]
]FIG]

* 拡張

[17] [[JSON-stat]] は [[schema.org]] の規定に従い [CODE(URI)[[[http://schema.org/Table]]]]
を拡張した [CODE(URI)[[[http://schema.org/Table/Stats]]]] などを使っています [SRC[>>16]]。

[REFS[
- [16] [CITE@en[Schema. JSON-stat]] ([[Xavier Badosa http://xavierbadosa.com]] 著, [TIME[2014-12-19 22:29:24 +09:00]] 版) <http://json-stat.org/schema/>
]REFS]

* 応用

[46] 
[[Google しごと検索]]

* 歴史

[11] [[Google]] が [[Data-Vocabulary.org]] という[[語彙]]を定義し実装していましたが、
[TIME[2011年][year:2011]]に他の[[検索エンジン]][[事業者]]も加わって新たに [[schema.org]] が定義されました。


[2] [CITE@en[Re: Draft Note for HTML WG]]
( ([[Dan Brickley]] 著, [TIME[2011-11-15 21:25:54 +09:00]] 版))
<http://lists.w3.org/Archives/Public/public-html-data-tf/2011Nov/0117.html>

[3] [CITE@en-US[Google Indexing RDFa 1.0 + schema.org Markup | The Beautiful, Tormented Machine]]
( ([TIME[2013-11-12 14:55:21 +09:00]] 版))
<http://manu.sporny.org/2012/google-indexing-schema-rdfa/>

[4] [[Google]] の[[構造化データ テスト ツール]]によると、 [[RDFa 1.1 Lite]] を使った [[Schema.org]]
語彙による記述に対応しているみたいです。 [TIME[2013-11-12T14:59:24.300Z]]

[5] [CITE@en[Overview - Actions in the Inbox — Google Developers]]
( ([TIME[2013-09-26 20:16:26 +09:00]] 版))
<https://developers.google.com/gmail/actions/overview?&hl=ja>

[6] [CITE[schema blog: Schema.org and JSON-LD]]
( ([TIME[2013-11-21 19:47:43 +09:00]] 版))
<http://blog.schema.org/2013/06/schemaorg-and-json-ld.html>

[7] [CITE@en[Re: schema.org growth what are the limits?]]
( ([[Dan Brickley]] 著, [TIME[2013-07-27 00:27:14 +09:00]] 版))
<http://lists.w3.org/Archives/Public/public-vocabs/2013Jul/0088.html>

[8] [CITE@en[Extending Schemas - schema.org]]
( ([TIME[2013-07-23 23:55:51 +09:00]] 版))
<http://schema.org/docs/extension.html>

[9] [CITE@en[Cookbook/Schema.org - GoodRelations Wiki]]
( ([TIME[2013-09-16 07:21:46 +09:00]] 版))
<http://wiki.goodrelations-vocabulary.org/Cookbook/Schema.org>

[12] [CITE@ja[Actions in the Inbox — Google Developers]]
( ([TIME[2014-06-23 18:21:19 +09:00]] 版))
<https://developers.google.com/gmail/actions/>

[13] [CITE@en[danbri/schemaorg]]
( ([TIME[2014-10-01 00:10:27 +09:00]] 版))
<https://github.com/danbri/schemaorg>

[14] [CITE@en[Bug 27388 – Use https://schema.org/ in examples if feasible]]
( ([TIME[2014-11-22 17:00:11 +09:00]] 版))
<https://www.w3.org/Bugs/Public/show_bug.cgi?id=27388>

[15] [CITE@en[rvguha/schemaorg]]
( ([TIME[2014-12-17 18:27:33 +09:00]] 版))
<https://github.com/rvguha/schemaorg>

[FIG(quote)[
[FIGCAPTION[
[18] [CITE@en-US[Schema.org Community Group]]
([TIME[2015-04-05 21:49:37 +09:00]] 版)
<https://www.w3.org/community/schemaorg/>
]FIGCAPTION]

> The Schema.org Community Group provides a forum for discussing all changes, additions and extensions to schema.org. In addition to providing a public setting for the day to day operation of the project, it serves as the mechanism for reviewing extensions and as a liaison point for all parties developing independent extensions to the schema.org core.

]FIG]


[19] [CITE[public-schemaorg@w3.org Mail Archives]]
([TIME[2015-04-03 21:48:07 +09:00]] 版)
<https://lists.w3.org/Archives/Public/public-schemaorg/>

[20] [CITE@en[schemaorg/schemaorg]]
([TIME[2015-04-05 21:51:43 +09:00]] 版)
<https://github.com/schemaorg/schemaorg>

[21] [CITE@en[schema.org project]]
([TIME[2015-04-05 21:51:57 +09:00]] 版)
<https://github.com/schemaorg>

[22] [CITE@en[Schema.org github (@schemaorg_dev) | Twitter]]
([TIME[2015-04-05 21:51:52 +09:00]] 版)
<https://twitter.com/schemaorg_dev>

[23] [CITE@en[Release listing - schema.org]]
([TIME[2015-04-05 21:52:52 +09:00]] 版)
<http://schema.org/docs/releases.html>

[FIG(quote)[
[FIGCAPTION[
[24] [CITE@en-US[Schema Bib Extend Community Group]]
([TIME[2015-04-05 22:17:25 +09:00]] 版)
<https://www.w3.org/community/schemabibex/>
]FIGCAPTION]

> The mission of this group is to discuss and prepare proposal(s) for extending Schema.org schemas for the improved representation of bibliographic information markup and sharing. The group will seek consensus around, and support for, proposal(s) to the W3C WebSchemas Group. This Community Group will not, itself, produce technical specifications.

]FIG]

[26] [CITE[schema blog: W3C "Web Schemas" group is our new public feedback forum]]
( ([TIME[2012-06-09 03:58:49 +09:00]] 版))
<http://blog.schema.org/2011/10/w3c-web-schemas-group-is-our-new-public.html>

[27] [CITE[IRC logs: freenode / #whatwg / 20120713]]
( ([TIME[2012-07-21 01:41:48 +09:00]] 版))
<http://krijnhoetmer.nl/irc-logs/whatwg/20120713#l-1090>

[25] [CITE[public-schemabibex@w3.org Mail Archives]]
([TIME[2015-03-16 12:12:27 +09:00]] 版)
<https://lists.w3.org/Archives/Public/public-schemabibex/>

[FIG(quote)[
[FIGCAPTION[
[28] ([TIME[2015-11-24 14:17:39 +09:00]] 版)
<https://spacemarket.com/search?sort=3>
]FIGCAPTION]

> 
> <article class="item " itemscope itemtype="http://schema.org/LodgingBusiness">

]FIG]


[29] [CITE@en[Full Release Summary: Schema.org - latest - 2016-05-04]]
( ([TIME[2016-05-17 19:18:35 +09:00]]))
<https://schema.org/version/3.0/>

[30] [CITE@en[Official Google Webmaster Central Blog: Surfacing your business's contact and local info in Google]]
( ([TIME[2016-07-20 00:04:37 +09:00]]))
<https://webmasters.googleblog.com/2014/04/surfacing-your-businesss-contact-and.html>

[31] [CITE@en[Enhance Your Site's Attributes  |  Search  |  Google Developers]]
( ([TIME[2016-06-23 05:06:57 +09:00]]))
<https://developers.google.com/search/docs/guides/enhance-site?rd=1>

[32] [CITE@en[Corporate Contacts  |  Search  |  Google Developers]]
( ([TIME[2016-05-18 10:35:16 +09:00]]))
<https://developers.google.com/search/docs/data-types/corporate-contacts>

[33] [CITE[schema blog: schema.org update: hotels, datasets, "health-lifesci" and "pending" extensions...]]
([TIME[2016-08-22 05:03:57 +09:00]])
<http://blog.schema.org/2016/08/schemaorg-update-hotels-datasets-health.html>

[FIG(quote)[
[FIGCAPTION[
[34] [CITE@en-US[WebAPI Discovery Community Group]]
([TIME[2016-12-28 01:27:16 +09:00]])
<https://www.w3.org/community/web-api-discovery/>
]FIGCAPTION]

> A group to develop a mechanism for the automatic discovery of WebAPIs, by extending the schema.org vocabulary. Increasingly, large online platforms and services provide one or more Web APIs for third-party developers.

]FIG]


[35] [CITE[API Discovery: Can we do better?]]
([[Ivan Goncharov]]著, [TIME[2016-12-28 01:27:26 +09:00]])
<https://blog.apis.guru/api-discovery-can-we-do-better-2336706d5407#.uho5aylc4>

[36] [CITE[schema blog: Schema.org 3.2 release: courses, fact-checking, digital publishing accessibility, menus and more...]]
([TIME[2017-03-26 08:05:09 +09:00]])
<http://blog.schema.org/2017/03/schemaorg-32-release-courses-fact.html>

[37] [CITE@en[schemaorg/schemaorg: Schema.org - schemas and (appengine) software]]
([TIME[2017-05-31 21:44:02 +09:00]])
<https://github.com/schemaorg/schemaorg>

[38] [CITE@ja[定期購入とペイウォール コンテンツ  |  検索  |  Google Developers]]
([TIME[2017-10-02 12:29:34 +09:00]])
<https://developers.google.com/search/docs/data-types/paywalled-content>

[39] [CITE@en[Changes to the hosted extension model Fwd: Schema.org v3.5 release  candidate for review]]
([[Dan Brickley]]著, [TIME[2019-03-21 11:54:08 +09:00]])
<https://lists.w3.org/Archives/Public/public-schemaorg/2019Mar/0049.html>

[40] [CITE@en[BiblioGraph.net Vocabulary Deprecated]]
([[Richard Wallis]]著, [TIME[2019-05-31 18:09:18 +09:00]])
<https://lists.w3.org/Archives/Public/public-schemaorg/2019May/0010.html>

[44] [CITE@ja[求人情報  |  検索  |  Google Developers]]
([TIME[2019-11-20 13:19:25 +09:00]])
<https://developers.google.com/search/docs/data-types/job-posting>