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* meta 要素 scheme 属性 (HTML, XHTML)

- [4] [CODE(HTML)[scheme]] 属性は、 [CODE(HTML)[[[content]]]] 属性の値の型を明示するために使います。型名は機械が読めるものではなく、人間が読むということで、きちんと定義されてはいません。
- [5] >>4 でも読む人がいるのか謎だ。というか実際使ってる人はほとんどいない。 [[Stricter]] でも稀稀。
- [7] [[WML]] 1.0 の [CODE(XML)[[[meta]]]] 要素にも [CODE(HTML)[scheme]] 属性が (たぶん HTML からこぴってそのまま) あるみたいだけど、 UA は対応してないぽ、って書いてある。
- [10] 大文字・小文字を区別するそうです。
- [11] [DC] ''Recording qualified Dublin Core metadata in HTML meta elements'' <http://dublincore.org/documents/dcq-html/>: DC の詳細化識別子を使う方法の仕様書
- [28] [[DOM]] では [CODE[[VAR(DOMi)[[[HTMLMetaElement]]]].[CODE(DOMa)[scheme]]]] 属性が対応します。

[29]
<IW:HTML4:"struct/global.html#idx-scheme">
の例で、 HTML 4.0 では [SAMP(HTML)[Month-Date-Year]] を挙げていましたが、
HTML 4.01 で minor typo として
[SAMP(HTML)[Month-Day-Year]]
に修正されました。

参考: <IW:HTML4:"appendix/changes.html#h-A.1.3">

[82] 
<http://dublincore.org/documents/dc-html/> や
<http://www.agls.gov.au/pdf/AGLS%20Metadata%20Standard%20Part%202%20Usage%20Guide.PDF>
は、 [[schema.PREFIX]] による[[URL]]と接頭辞との関連付けの仕組み
([[DCMI]] が [CODE(HTML)@en[[[<meta name>]]]] に関して提案していたもの)
を [CODE(HTMLa)@en[[[scheme]]]] [[属性値]]にも適用しているようです。

[30]
[CITE[Dublin Core Qualifiers/Substructure]] <http://www.loc.gov/marc/dcqualif.html>

[CODE(HTMLa)[scheme]] で使う値として参照されることのある文書。
([[名無しさん]])

[31]
[CITE[Archived: Guide to the Individualized Education Program]] ([CODE[2007-05-22 17:47:31 +09:00]] 版) <http://www.ed.gov/parents/needs/speced/iepguide/index.html>

>
[PRE(HTML invalid example code)[

<meta name="ED.office" scheme="EDWeb" content="Office of Special Education and Rehabilitative Services (OSERS)">
<meta name="DC.identifier" scheme="URL" content="http://www.ed.gov/parents/needs/speced/iepguide/index.html">
<meta name="DC.date.valid" scheme="ISO 8601" content="2001-02-14">
<meta name="DC.subject" scheme="EDWeb" type="ED.program" content="Individuals with Disabilities Education Act">
<meta name="ED.status" content="archived">
<meta name="DC.format" scheme="IMT"  content="text/HTML">
<meta name="DC.title" content="Guide to the Individualized Education Program">
<meta name="DC.language" scheme="ISO 639-2" content="en">
<meta name="DC.description" content="The purpose of this archived guide is to assist educators, parents, and State and local educational agencies in implementing the requirements of Part B of the Individuals with Disabilities Education Act (IDEA) regarding Individualized Education Programs (IEPs) for children with disabilities, including preschool-aged children.">
<meta name="description" content="The purpose of this archived guide is to assist educators, parents, and State and local educational agencies in implementing the requirements of Part B of the Individuals with Disabilities Education Act (IDEA) regarding Individualized Education Programs (IEPs) for children with disabilities, including preschool-aged children.">
<meta name="DC.subject" scheme="EDWeb" type="descriptor" content="Individualized Education Programs; Special Education; Disabilities; Special Needs Students">
<meta name="keywords" content="Individualized Education Programs; Special Education; Disabilities; Special Needs Students; ">
<meta name="DC-ED.audience" scheme="EDWeb" type="mediator" content="Teachers; Local Education Agencies">
<meta name="DC-ED.audience" scheme="EDWeb" content="Disabled Students; Parents and Families; State Education Agencies">
<meta name="DC.type" scheme="EDWeb" content="Guides; Indexes">



<meta name="DC.date" scheme="ISO 8601" content="2007-03-23">
]PRE]

([[名無しさん]] [WEAK[2007-05-22 08:51:01 +00:00]])

[[#comment]]

** scheme 属性の値をとにかく列挙するスレ

- [CODE(HTML)[Year-Month-Day]] ([CODE(HTML)[[[content]]="2003-04-28"]])
- [6] [CODE(HTML)[Month-Date-Year]] ([CODE(HTML)[content="CONTENT="06-12-98""]]) (''Soar through HTML - Section 4'' <http://www.tg.rim.or.jp/~hexane/ach/stht/stht04.htm>)
- [8] [CODE(HTML)[Month-Date-Year]] ([CODE(HTML)[content="10-9-97"]]) (HTML 4 の仕様書から)
- [9] [CODE(HTML)[ISBN]] ([CODE(HTML)[content="0-8230-2355-9"]]) (HTML 4 仕様書)
- [12] [CODE(HTML)[AGIFT]] ([CODE(HTML)[content="NT:Information Management Standards"]]) ([DC])
- [13] [CODE(HTML)[RFC1766]] ([CODE(HTML)[content="en-AU"]]) ([DC])
- [14] [CODE(HTML)[W3CDTF]] ([CODE(HTML)[content="1999-04-21"]]) ([DC])
- [15] [CODE(HTML)[URI]] ([CODE(HTML)[content=""]]) ([DC])
- [16] [CODE(HTML)[IMT]] ([CODE(HTML)[content="text/html"]]) ([DC])
- [17] [CODE(HTML)[DCMIPeriod]] ([CODE(HTML)[content="start=1999-04-27"]]) ([DC])
- [18] [CODE(HTML)[DCMIType]] ([CODE(HTML)[content="image"]]) ([DC])
- [19] [CODE(HTML)[DCMIDCSV]] ([CODE(HTML)[content="name.Given=Eric; name.Family=Miller; Employer=OCLC Address=6565 Frantz Road, Dublin, Ohio, 43017-3395;"]]) ([DC])
- [20] [CODE(HTML)[DCMIDCSV]] ([CODE(HTML)[content="cols=344; rows=82"]]) ([DCT])
- [21] [CODE(HTML)[dds]] ([CODE(HTML)[content="[VAR[自然言語文]]"]])
- [22] [CODE(HTML)[yyyy-mm-dd]] ([CODE(HTML)[content="1998-11-05"]]) (''DAISY 2.0 Specification'' <http://www.dinf.ne.jp/doc/japanese/intl/daisycon/dtbook/spec/2/final/daisy-2.html>)
- [23] [CODE(HTML)[original]] ([CODE(HTML)[content="Barking Press"]]) ([DAISY])
- [24] [CODE(HTML)[keyword]] ([CODE(HTML)[content="pets"]]) ([DAISY])
- [25] [CODE(HTML)[edition]] ([CODE(HTML)[content="3rd"]]) ([DAISY])
- [26] [CODE(HTML)[MimeType]] ([CODE(HTML)[content="image/svg+xml"]]) (''SELFHTML: HTML/XHTML/HTMLヘッダ情報/メタ要素で内容を記述する'' <http://selfhtml-jp.teamone.de/html/kopfdaten/meta.htm#schema>)
- [27] [CODE(HTML)[MIME]] ([CODE(HTML)[content="text/html"]]) (''Article 338 at 00/08/20 12:34:58 From: JZA07433@nifty.ne.jp Subject: [sugj-doc:338] using_samba:appf_01.html'' <http://www.samba.gr.jp/ml/sugj-doc/htdocs/200008.month/338.html>)
- [33] [CODE(HTML)[GOLD]] ([CODE(HTML)[content="<META NAME="DC.Creator" SCHEME="GOLD" CONTENT="c=AU;o=Commonwealth of Australia;ou=National Library of Australia">"]]) (>>32)
- [34] [CODE(HTML)[APAIS Thesaurus]] ([CODE(HTML)[content="<META NAME="DC.Subject" SCHEME="APAIS Thesaurus" CONTENT="Standards; Cataloguing>"]]) (>>32)
- [35] [CODE(HTML)[RFC3066]] ([CODE(HTML)[content=" 	<META NAME="DC.Language" SCHEME="RFC3066" CONTENT="en">"]]) (>>32)
- [36] [CODE(HTML)[URI]] ([CODE(HTML)[content="<META NAME="DC.Relation.isPartOf" SCHEME="URI" CONTENT=http://www.can.net.au/>"]]) (>>32)
- [37] [CODE(HTML)[ISO 8601]] ([CODE(HTML)[content="<META NAME="DC.Coverage.temporal" SCHEME="ISO 8601" CONTENT="1999">"]]) (>>32)
- [38] [CODE(HTML)[AGIFT]] ([CODE(HTML)[content="<META NAME="AGLS.Function" SCHEME="AGIFT" CONTENT="Collection access; Collection promotion">"]]) (>>32)
- [39] [CODE(HTML)[DCMIPeriod]] ([CODE(HTML)[content=">>32"]]) (<META NAME="DC.Date.created" SCHEME="DCMIPeriod" CONTENT="start=1994-11">)
- [40] [CODE(HTML)[agls-document]] ([CODE(HTML)[content="<META NAME="DC.Type.documentType" SCHEME="agls-document" CONTENT=" *">"]]) (>>32)
- [41] [CODE(HTML)[agls-document]] ([CODE(HTML)[content="<META NAME="DC.Type.documentType" SCHEME="agls-document" CONTENT=" *">"]]) (>>32)
- [42] [CODE(HTML)[agls-service]] ([CODE(HTML)[content="<META NAME="DC.Type.serviceType" SCHEME="agls-service" CONTENT="enquiries; orders and purchases">"]]) (>>32)
- [43] [CODE(HTML)[ISSN]] ([CODE(HTML)[content="<META NAME="DC.Identifier" SCHEME="ISSN" CONTENT="1234-5678">"]]) (>>32)
- [44] [CODE(HTML)[ISO8601]] ([CODE(HTML)[content="<META NAME="DC.Date.created" SCHEME="ISO8601" CONTENT="1999-06-22">"]]) (>>32)
- [45] [CODE(HTML)[LCSH]] ([CODE(HTML)[content="<META NAME="DC.Coverage.spatial" SCHEME="LCSH" CONTENT="Australia"> "]]) (>>32)
- [46] [CODE(HTML)[LCSH]] ([CODE(HTML)[content="<META NAME="DC.Coverage.spatial" SCHEME="LCSH" CONTENT="Australia"> "]]) (>>32)
- [48] [CODE(HTML)[http://www.fao.org/agris/]] ([CODE(HTML)[content="<meta name="DC.Subject.subjectClassification" scheme="http://www.fao.org/agris/" content="C30" />"]]) (>>47)
- [49] [CODE(HTML)[http://lcweb.loc.gov/catdir/cpso/lcco/lcco.html]] ([CODE(HTML)[content="<meta name=" DC.Subject.subjectClassification" scheme="http://lcweb.loc.gov/catdir/cpso/lcco/lcco.html" content="Z699.35.M28" />"]]) (>>47)
- [50] [CODE(HTML)[http://www.fao.org/agrovoc/]] ([CODE(HTML)[content="<meta name="DC.SUBJECT.subjectThesaurus" scheme="http://www.fao.org/agrovoc/" content="AGRIS; DATA PROCESSING ; METHODS ; TRAINING ; LIBRARIANSHIP ; STANDARDS; INFORMATION STORAGE" />"]]) (>>47)
- [51] [CODE(HTML)[http://www.cabi-publishing.org/]] ([CODE(HTML)[content="<meta name="DC.SUBJECT.subjectThesaurus" scheme="http://www.cabi-publishing.org/" content="information processing; information systems; information storage; AGRIS" />"]]) (>>47)
- [52] [CODE(HTML)[http://lcweb.loc.gov/cds/lcsh.html]] ([CODE(HTML)[content="<meta name="DC.SUBJECT.subjectThesaurus" scheme="http://lcweb.loc.gov/cds/lcsh.html" content="Agricultural Metadata Element Set-- Handbooks, manuals, etc.; Information storage and retrieval systems--Agriculture; Metadata; Exchange of bibliographic information; Machine-readable bibliographic data formats; AGRIS (Information retrieval system)" />"]]) (>>47)
- [53] [CODE(HTML)[ISO639-2]] ([CODE(HTML)[content="<meta name="DC.language" scheme="ISO639-2" content="fre" /> "]]) (>>47)
- [54] [CODE(HTML)[ISO639-2]] ([CODE(HTML)[content="<meta name="DC.language" scheme="ISO639-2" content="fre" /> "]]) (>>47)
- [60] [CODE(HTML)[MESH]] ([CODE(HTML)[]]) ([[RFC 2371]])
- [61] [CODE(HTML)[ddc]] ([CODE(HTML)[]]) ([[RFC 2371]])
- [62] [CODE(HTML)[WTN8601]] ([CODE(HTML)[]]) ([[RFC 2371]])
- [63] [CODE(HTML)[ANSI.X3.X30-1985]] ([CODE(HTML)[]]) ([[RFC 2371]])
- [64] [CODE(HTML)[DCT1]] ([CODE(HTML)[]]) ([[RFC 2371]])
- [65] [CODE(HTML)[AAT]] ([CODE(HTML)[]]) ([[RFC 2371]])
- [66] [CODE(HTML)[ISO639-2]] ([CODE(HTML)[]]) ([[RFC 2371]])
- [67] [CODE(HTML)[rfc1766 ]] ([CODE(HTML)[]]) ([[RFC 2371]])
- [68] [CODE(HTML)[LCCN ]] ([CODE(HTML)[]]) ([[RFC 2371]])
- [69] [CODE(HTML)[LCCN ]] ([CODE(HTML)[]]) ([[RFC 2371]])
- [70] [CODE(HTML)[LCCN ]] ([CODE(HTML)[]]) ([[RFC 2371]])
- [72] [CODE(HTML)[DOI]] ([CODE(HTML)[]]) ([[RFC 2371]])
-[73] [CODE(HTML)[TGN]] ([CODE(HTML)[]]) ([[RFC 2371]])
[[#form:'%text(label=>"値",description=>"特に推奨が無ければ小文字にすべし。",size=>10,id=>value); %text(label=>"適用例",description=>"content 属性の値の例",size=>10,id=>content); %text(label=>参考,size=>20,id=>comment);':'-[%index;] [CODE(HTML)[%text(source=>value);]] ([CODE(HTML)[%text(source=>content);]])%text(prefix=>" (",suffix=>")",source=>comment);']]

* [CODE(HTMLa)@en[scheme]] 属性値を定義する HTML メタ情報プロファイル

[55] [[HTML 4]] によれば [CODE(HTMLa)@en[[[scheme]]]] [[属性値]]の解釈は使用している
[[HTMLメタ情報プロファイル]]と [CODE(HTMLa)@en[[[name]]]]
[[属性値]]によって決まります。

[56]
[CODE(HTMLa)@en[[[profile]]]] [[属性]]が指定されていない状態で使える
[CODE(HTMLa)@en[[[scheme]]]] [[属性値]]はありません (少なくても [[HTML 4]] 
仕様書に明記されていません)。

;; [[HTML 4]] 仕様書内にも例示はいくつかありますが・・・。

[57]
実際に [CODE(HTMLa)@en[[[scheme]]]] [[属性値]]を定義している
[[HTMLメタ情報プロファイル]]はほとんどありません。

[58]
[CITE@en[Expressing Dublin Core in HTML/XHTML meta and link elements]] ([CODE[2008-03-22 13:27:05 +09:00]] 版) <http://dublincore.org/documents/dcq-html/>

いくつか値を定義しています。
([[名無しさん]])

[59]
[CITE@en[Meta data profiles (MP)]] ([CODE[1970-01-01 00:00:00 +09:00]] 版) <http://www.osamurai.flnet.org/profiles/>

直接値を定義していませんが、 schema.DC 形式で[[名前空間]]を宣言できるようで、
実際に [CODE(HTMLa)@en[[[scheme]]]] を使った例が仕様書に載っています。
([[名無しさん]])

[71]
[CITE@en-US[Metadata Profile]] ([[Checky Team (http://checky.sourceforge.net)]] 著, [CODE[2004-12-31 00:56:55 +09:00]] 版) <http://checky.sourceforge.net/profile.html#>

直接値を定義していませんが、 (かなり不明瞭とはいえ一応) >>58 を参照していると解釈できるので、
>>58 の [CODE(HTMLa)@en[[[scheme]]]] [[属性値]]が使えると解釈することもできると思われます。
([[名無しさん]])

[[#comment]]

* 歴史

[175] 
[[HTML]]
由来で 
[[DTBook]] の [CODE[meta]] [[要素]]にもありました。

* メモ

- [1] scheme? [[schema]]? 正しく使い分けよう!
- [2] >>1 schema で定義するのが scheme だよん
- [3] >>2 scheme を定義するのが schema だよん

[32]
[CITE[Web Site Metadata Strategies and Guidelines]] ([CODE[2008-03-22 12:39:16 +09:00]] 版) <http://www.nla.gov.au/metadata.html>
([[名無しさん]])

[47]
[CITE[Profil d’application AGRIS pour le syst&#232;me international des sciences et de la technologie agricoles]] ([CODE[2008-03-22 12:49:05 +09:00]] 版) <http://www.fao.org/docrep/009/ae909f/AE909F01.htm>
([[名無しさん]])

[74] [CITE@en[(X)HTML5 Tracking]]
([TIME[2009-08-29 00:35:48 +09:00]] 版)
<http://html5.org/tools/web-apps-tracker?from=3682&to=3683>

[FIG(quote)[
[FIGCAPTION[
[75] ([TIME[2010-07-17 01:22:21 +09:00]] 版)
<http://www.agls.gov.au/pdf/AGLS%20Metadata%20Standard%20Part%202%20Usage%20Guide.PDF#page=40>
]FIGCAPTION]

> <meta name="AGLSTERMS.availability" scheme="DCTERMS.URI"
> content="http://example.org/services/id5678">
> <meta name="AGLSTERMS.availability" scheme="AGLSTERMS.AglsAvail"
> content="corporateName=Better Read Than Dead; address=121 King Street,
> Newtown, NSW; hours=Mon-Sat 09:30—21:00, Sun 10:00—18:00; cost=$29.95">

]FIG]

[FIG(quote)[
[FIGCAPTION[
[76] ([TIME[2010-07-17 01:22:21 +09:00]] 版)
<http://www.agls.gov.au/pdf/AGLS%20Metadata%20Standard%20Part%202%20Usage%20Guide.PDF#page=42>
]FIGCAPTION]

> <meta name="DCTERMS.identifier" scheme="DCTERMS.URI"
> content="http://www.agls.gov.au/documents/usageguide/">
> <meta name="DCTERMS.identifier" scheme="DCTERMS.ISBN" content="0-642-42242-
> 7">
> <meta name="DCTERMS.identifier" scheme="DCTERMS.URI" content="urn:isbn:0-
> 642-42242-7">
> <meta name="DCTERMS.identifier" scheme="DCTERMS.URI"
> content="urn:uuid:4ef86ac0-de5b-1028-bad9-000E35A1F66C">
> <meta name="DCTERMS.identifier" scheme="DCTERMS.DOI" content="10.1000/182">
> <meta name="DCTERMS.identifier" scheme="DCTERMS.URI"
> content="urn:doi:10.1000/182">

]FIG]

[FIG(quote)[
[FIGCAPTION[
[77] ([TIME[2010-07-17 01:22:21 +09:00]] 版)
<http://www.agls.gov.au/pdf/AGLS%20Metadata%20Standard%20Part%202%20Usage%20Guide.PDF#page=43>
]FIGCAPTION]

> <meta name="DCTERMS.publisher" scheme="DCTERMS.URI"
> content="http://example.org/agents/id1234">
> <meta name="DCTERMS.publisher" scheme="AGLSTERMS.GOLD" content="c=AU;
> o=Commonwealth of Australia; ou=Department of Prime Minister and Cabinet;
> ou=National Archives of Australia">
> <meta name="DCTERMS.publisher" scheme="AGLSTERMS.AglsAgent"
> content="corporateName=Rural Real Estate; address=16 Haybale Avenue,
> Wheatfield, SA; hours=Mon-Fri 08:00-16:00, Sat 08:00-12:00">

]FIG]

[FIG(quote)[
[FIGCAPTION[
[78] ([TIME[2010-07-17 01:22:21 +09:00]] 版)
<http://www.agls.gov.au/pdf/AGLS%20Metadata%20Standard%20Part%202%20Usage%20Guide.PDF#page=46>
]FIGCAPTION]

> <meta name="AGLSTERMS.function" scheme="AGLSTERMS.AGIFT" content="Workers
> compensation schemes; Occupational health and safety">

]FIG]

[FIG(quote)[
[FIGCAPTION[
[79] ([TIME[2010-07-17 01:22:21 +09:00]] 版)
<http://www.agls.gov.au/pdf/AGLS%20Metadata%20Standard%20Part%202%20Usage%20Guide.PDF#page=47>
]FIGCAPTION]

> 
> <meta name="DCTERMS.language" scheme="DCTERMS.RFC4646" content="zh-Hans-SG">
> <meta name="DCTERMS.language" scheme="DCTERMS.ISO639-3" content="ban">

]FIG]

[FIG(quote)[
[FIGCAPTION[
[80] ([TIME[2010-07-17 01:22:21 +09:00]] 版)
<http://www.agls.gov.au/pdf/AGLS%20Metadata%20Standard%20Part%202%20Usage%20Guide.PDF#page=48>
]FIGCAPTION]

> 
> <meta name="DCTERMS.subject" scheme="AGLSTERMS.APAIS" content="Industrial
> research and development">
> <meta name="DCTERMS.subject" scheme="AGLSTERMS.APT" content="birds' nests;
> eggs; feathers">
> <meta name="DCTERMS.subject" scheme="DCTERMS.LCSH" content="World War, 1914-
> 1918-–Campaigns--Turkey--Gallipoli Peninsula">
> <meta name="DCTERMS.subject" scheme="AGLSTERMS.TAGS" content="Child custody;
> Child support; Child welfare">

]FIG]

[FIG(quote)[
[FIGCAPTION[
[81] ([TIME[2010-07-17 01:22:21 +09:00]] 版)
<http://www.agls.gov.au/pdf/AGLS%20Metadata%20Standard%20Part%202%20Usage%20Guide.PDF#page=50>
]FIGCAPTION]

> 
> <meta name="DCTERMS.type" scheme="DCTERMS.DCMIType" content="Event">
> <meta name="AGLSTERMS.aggregationLevel" content="collection">
> <meta name="AGLSTERMS.category" content="service">
> <meta name="AGLSTERMS.documentType" scheme="AGLSTERMS.agls-document"
> content="contract">
> <meta name="AGLSTERMS.serviceType" scheme="AGLSTERMS.agls-service"
> content="bookings and reservations">

]FIG]

[83] [CITE[Counts of pages with particular <meta scheme> values, out of ~425K pages as in http://philip.html5.org/data/dotbot-20090424.txt]]
([TIME[2009-05-08 01:15:37 +09:00]] 版)
<https://philip.html5.org/data/meta-scheme-values.txt>

[FIG(quote)[
[FIGCAPTION[
[84] [CITE@ja[Web スライスを使用したコンテンツの購読]]
([TIME[2015-04-19 14:55:14 +09:00]] 版)
<https://msdn.microsoft.com/ja-jp/library/cc196992(v=vs.85).aspx>
]FIGCAPTION]

> <meta name="slice" scheme="IE" content="off"/>

]FIG]

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