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MetaExtensions
This page lists extension values for the name="" attribute of the HTML <meta> element. You may add your own values to this list.
For assistance in preparing a specification, see the specification editing category and the Bikeshed documentation.
If the specification is ready, we ask that you:
- Avoid redundancy. If someone has already defined a name that does roughly what you want, please reuse it.
- Be sure to include all the items outlined in the spec including a link to a specification that specifies the keyword as an HTML meta keyword. If a proposal lacks a specification and a version in a complete specification exists, the latter is to be preferred.
- Alphabetize by keyword, without regard for case, in any table. Sort nonalphanumerics by ASCII value.
- Namespaces cannot be reserved. Instead, register individual names (known as enumerated values although you don't have to number them).
URL-valued attributes must not be added to this page as meta names but should be registered as rel keywords instead.
Meta Name Extensions
| Keyword | Brief description | Link to specification | Synonyms | Status |
|---|---|---|---|---|
| AGLSTERMS.accessibility | A statement indicating the accessibility characteristics of the resource. | AGLS Metadata Usage Guide | Proposal | |
| AGLSTERMS.accessMode | Perceptual mode for the resource. | AGLS Metadata Usage Guide | Proposal | |
| AGLSTERMS.act | A specific piece of legislation which requires or drives the creation or provision of the resource. | AGLS Metadata Usage Guide | Proposal | |
| AGLSTERMS.aggregationLevel | The level of aggregation of the described resource - an 'item' or a 'collection'. | AGLS Metadata Usage Guide | Proposal | |
| AGLSTERMS.allow-search | A specific piece of legislation which requires or drives the creation or provision of the resource. | AGLS Metadata Usage Guide | Proposal | |
| AGLSTERMS.availability | How the resource can be obtained or accessed, or contact information. Primarily used for offline resources to provide information on how to obtain physical access to the resource. | AGLS Metadata Usage Guide | Proposal | |
| AGLSTERMS.case | A specific piece of case law which requires or drives the creation or provision of the resource. | AGLS Metadata Usage Guide | Proposal | |
| AGLSTERMS.category | The generic type of the resource being described - a 'service', 'document' or 'agency'. | AGLS Metadata Usage Guide | Proposal | |
| AGLSTERMS.dateLicensed | Date a license was applied or became effective. | AGLS Metadata Usage Guide | Proposal | |
| AGLSTERMS.documentType | The form of the described resource where the value of category is‘document’. Document is used in its widest sense and includes resources such as text, images, sound files and software. | AGLS Metadata Usage Guide | Proposal | |
| AGLSTERMS.function | The business function to which the resource relates. Functions are the major units of activity which organisations pursue in order to meet the mission and goals of the organisation. | AGLS Metadata Usage Guide | Proposal | |
| AGLSTERMS.isBasedOn | A related resource of which the described resource is a performance, production, derivation, translation or interpretation. | AGLS Metadata Usage Guide | Proposal | |
| AGLSTERMS.isBasisFor | A related resource that is a performance, production, derivation, translation or interpretation of the described resource. | AGLS Metadata Usage Guide | Proposal | |
| AGLSTERMS.jurisdiction | The name of the political/administrative entity covered by the described resource. | AGLS Metadata Usage Guide | Proposal | |
| AGLSTERMS.mandate | A specific legal instrument which requires or drives the creation or provision of the resource. | AGLS Metadata Usage Guide | Proposal | |
| AGLSTERMS.protectiveMarking | A protective marking applied to the described resource. | AGLS Metadata Usage Guide | Proposal | |
| AGLSTERMS.regulation | A specific regulation which requires or drives the creation or provision of the resource. | AGLS Metadata Usage Guide | Proposal | |
| AGLSTERMS.serviceType | The form of the described resource where the value of category is ‘service'. | AGLS Metadata Usage Guide | Proposal | |
| alexaverifyid | Used to verify ownership of Alexa Search | Alexa FAQ About this meta attribute Reference | Proposal | |
| apple-itunes-app | Promoting Apps with Smart App Banners | Safari Web Content Guide | Proposal | |
| apple-mobile-web-app-capable | Sets whether a web application runs in full-screen mode. | Apple Safari HTML Reference | mobile-web-app-capable (also could maybe be assumed when application-name is set?)
|
Proposal |
| apple-mobile-web-app-status-bar-style | Sets the style of the status bar for a web application. | Apple Safari HTML Reference | Proposal | |
| apple-mobile-web-app-title | Sets the title of the application when added to the homescreen on iOS6+ | Unofficial Documentation of apple-mobile-web-app-title - Read more about Apple's web-app's at Apple Safari HTML Reference | Proposal | |
| apple-touch-fullscreen | forces iPhone Fullscreen mode, if added to home screen. Not needed anymore. | No specification yet | Proposal | |
| application-name | For Windows 7: "[D]efines the name of the Pinned site application instance. This is the name that appears in a tooltip when hovering over the Pinned site button on the Windows 7 taskbar. The application name is also appended to the window title of the Pinned site application instance." Although the documentation refers to an application, it gives an example of writing this metadata for HTML. Indeed, this name must not be used except in a Web application, according to HTML Living Standard and HTML 5.1. | Declaring Pinned Site Metadata (Microsoft Developer Network) | Proposed | |
| application-url | Start URL of web apps in Google Chrome
The "application-url" meta tag can be used to specify the start URL of pinned web apps in Google Chrome. <meta name="application-url" content="https://gmail.com/"> |
Google Chrome Webmaster FAQ Chromium issue response | Proposal | |
| audience | Categorize the principal intended audience for the page, generally with a controlled vocabulary. Google uses this tag: Custom Search Help, as accessed Jan. 8, 2016. |
BrittleBit.org spec | Proposal | |
| bitcoin | A bitcoin-address | Short documentation (unofficial): JokeNetwork's unofficial documentation for bitcoin-metatag, more informations about the Bitcoin-adress: Bitcoin wiki | Proposal | |
| blazerr-secure | Decides whether connect via a secure connection or not to JokeNetwork's Blazerr-System. Synonym to blazerr-ssl, but only for old browsers such as Internet Explorer 7. Usage: |
JokeNetwork's Blazerr Documentation | Proposal | |
| blazerr-seo | Checks whether Blazerr SEO has been used or not. It contains the user-id and the SEO Version. Usage: |
JokeNetwork's Blazerr Documentation | Proposal | |
| blazerr-ssl | Decides whether connect via a secure connection or not to JokeNetwork's Blazerr-System. Similar to blazerr-secure. Usage: |
JokeNetwork's Blazerr Documentation | blazerr-secure is partial synonym (see that entry) | Proposal |
| blazerr-support-id-noncookies | Used to identify users for JokeNetwork's Blazerr Support-System without a cookie. Deprecated. | JokeNetwork's Blazerr Documentation | Proposal | |
| blazerr-support-identifier | Used to identify users for JokeNetwork's Blazerr Support-System along with a cookie. The verification of a user without the use of cookies can be obtained with the deprecated meta tag blazerr-support-id-noncookies. | JokeNetwork's Blazerr Documentation | Proposal | |
| bug.blocked | Bugzilla dependency tree to which the https://dvcs.w3.org/hg/webcomponents/raw-file/default/assets/scripts/bug-assist.js bug-creation script will add a link. | Embedded documentation | Proposal | |
| bug.comment | Bugzilla comment used by the https://dvcs.w3.org/hg/webcomponents/raw-file/default/assets/scripts/bug-assist.js bug-creation script. | Embedded documentation | Proposal | |
| bug.component | Bugzilla component against which the https://dvcs.w3.org/hg/webcomponents/raw-file/default/assets/scripts/bug-assist.js bug-creation script will create a new bug. | Embedded documentation | Proposal | |
| bug.product | Bugzilla product against which the https://dvcs.w3.org/hg/webcomponents/raw-file/default/assets/scripts/bug-assist.js bug-creation script will create a new bug. | Embedded documentation | Proposal | |
| bug.short_desc | Bugzilla short description used by the https://dvcs.w3.org/hg/webcomponents/raw-file/default/assets/scripts/bug-assist.js bug-creation script. | Embedded documentation | Proposal | |
| cfia.gdr.activity | Canadian Food Inspection Agency Guidance Document Repository Page Activity | Coming soon at CFIA website | Proposal | |
| cfia.gdr.commodity | Canadian Food Inspection Agency Guidance Document Repository Page Commodity | Coming soon at CFIA website | Proposal | |
| cfia.gdr.include | Canadian Food Inspection Agency Guidance Document Repository Page | Coming soon at CFIA website | Proposal | |
| cfia.gdr.program | Canadian Food Inspection Agency Guidance Document Repository Page Program | Coming soon at CFIA website | Proposal | |
| citation_author | The name of an author of an academic paper | Google Scholar indexing documentation | Proposal | |
| citation_author_email | The email address of the preceding author (identified using citation_author) of an academic paper | Proposal | ||
| citation_author_institution | The name of an institution to which the preceding author (identified using citation_author) of an academic paper is affiliated | Proposal | ||
| citation_conference_title | The title of the conference at which an academic paper is published | Google Scholar indexing documentation | Proposal | |
| citation_date | The publication date of an academic paper | Proposal | ||
| citation_dissertation_institution | The name of the institution which published an academic dissertation | Google Scholar indexing documentation | Proposal | |
| citation_doi | The Digital Object Identifier of an academic paper | Proposal | ||
| citation_firstpage | The first page of the journal in which an academic paper is published | Google Scholar indexing documentation | Proposal | |
| citation_fulltext_html_url | The URL of the full text HTML version of an academic paper | Proposal | ||
| citation_isbn | The ISBN of the book in which an academic paper is published | Google Scholar indexing documentation | Proposal | |
| citation_issn | The ISSN of the journal in which an academic paper is published | Google Scholar indexing documentation | Proposal | |
| citation_issue | The issue of the journal in which an academic paper is published | Google Scholar indexing documentation | Proposal | |
| citation_journal_abbrev | The abbreviated title of the journal in which an academic paper is published | Proposal | ||
| citation_journal_title | The title of the journal in which an academic paper is published | Google Scholar indexing documentation | Proposal | |
| citation_keywords | A semicolon-separated list of keywords associated with an academic paper | Proposal | ||
| citation_language | The language in which an academic paper is written, as an ISO 639-1 two-letter code | Proposal | ||
| citation_lastpage | The last page of the journal in which an academic paper is published | Google Scholar indexing documentation | Proposal | |
| citation_pdf_url | The URL of a PDF version of an academic paper | Google Scholar indexing documentation | Proposal | |
| citation_publication_date | The publication date of an academic paper | Google Scholar indexing documentation | Proposal | |
| citation_publisher | The name of the publisher of an academic paper | The spec (as accessed 11-26-17) omits this meta name but refers to the meta name DC.publisher (see that on this page). | Proposal | |
| citation_technical_report_institution | The name of the institution which published an academic technical report or preprint | Google Scholar indexing documentation | Proposal | |
| citation_technical_report_number | The identification number of an academic technical report or preprint | Google Scholar indexing documentation | Proposal | |
| citation_title | The title of an academic paper | Google Scholar indexing documentation | Proposal | |
| citation_volume | The volume of the journal in which an academic paper is published | Google Scholar indexing documentation | Proposal | |
| collection | To replace the obsolete dc:collection. A collection is described as a group, an aggregation of topics Used to describe the top-level content of XHTML documents. These appear in your META tags showing a group of subject. Website Taxonomy improve classification for search engine analysis and semantic communication with a description language content.
<meta name="collection" content="MetaExtensions" /> <meta name="subject" content="topics, thesaurus, Meta Tag, header, semantic" /> |
[1] | Proposal | |
| contact | Defines the vendor's contact information by way of a phone-number (such as the customer support number), an e-mail ID (such as the customer support mail ID) or a physical address (such as the office address or billing address). Usage: |
Documentation | Proposal | |
| creator | Identify the creator of the page’s content, the content generally being the principal part of what info is rendered for website visitors. | BrittleBit.org spec | Proposal | |
| csrf-param | Cross-site request forgery protection parameter for Ruby on Rails | Rails API | Proposal | |
| csrf-token | Cross-site request forgery protection token for Ruby on Rails | Rails API | Proposal | |
| da_anonymiseIP | Defines anonymiseIP parameter for Decibel Insight | Documentation | Proposal | |
| da_contactCompany | Defines the contactCompany of the page for Decibel Insight | Documentation | Proposal | |
| da_contactEmail | Defines the contactEmail of the page for Decibel Insight | Documentation | Proposal | |
| da_contactFirstName | Defines the contactFirstName of the page for Decibel Insight | Documentation | Proposal | |
| da_contactLastName | Defines the contactLastName of the page for Decibel Insight | Documentation | Proposal | |
| da_contactName | Defines the contactName of the page for Decibel Insight | Documentation | Proposal | |
| da_contactTelephone | Defines the contactTelephone of the page for Decibel Insight | Documentation | Proposal | |
| da_conversionCurrency | Defines the conversionCurrency of the page for Decibel Insight | Documentation | Proposal | |
| da_conversionId | Defines the conversionId of the page for Decibel Insight | Documentation | Proposal | |
| da_conversionValue | Defines the conversionValue of the page for Decibel Insight | Documentation | Proposal | |
| da_goalCurrency | Defines the goalCurrency of the page for Decibel Insight | Documentation | Proposal | |
| da_goalId | Defines the goalId of the page for Decibel Insight | Documentation | Proposal | |
| da_goalValue | Defines the goalValue of the page for Decibel Insight | Documentation | Proposal | |
| da_interactionSelector | Defines the interactionSelector parameter for Decibel Insight | Documentation | Proposal | |
| da_pageRole | Defines the role of the page for Decibel Insight | Documentation | Proposal | |
| da_pageTaxonomy | Defines the taxonomy of the page for Decibel Insight | Documentation | Proposal | |
| da_pageTitle | Defines the pageTitle of the page for Decibel Insight | Documentation | Proposal | |
| da_pageVersion | Defines the pageVersion of the page for Decibel Insight | Documentation | Proposal | |
| da_sessionId | Defines the sessionId parameter for Decibel Insight | Documentation | Proposal | |
| da_userId | Defines the userId parameter for Decibel Insight | Documentation | Proposal | |
| dc.created | Date of creation of the resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dc.creator | An entity primarily responsible for making the resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dc.date.issued | Date of publication for Google News. The format of the content is YYYY-MM-DD or YYYY-MM-DDThh:mm:ssTZD.
It must be accompanied by a |
Google News documentation | dcterms.issued (former <time pubdate> no longer considered due to the abort of @pubdate)
|
Proposal |
| dc.dateCopyrighted | Date of copyright.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dc.dateSubmitted | Date of submission of the resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dc.description | An account of the resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dc.language | A language of the resource. Recommended best practice is to use a controlled vocabulary such as RFC 4646 [RFC4646].
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Redundant with the lang attribute on the
|
Proposal |
| dc.license | A legal document giving official permission to do something with the resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dc.mediator | An entity that mediates access to the resource and for whom the resource is intended or useful.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dc.medium | The material or physical carrier of the resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dc.modified | Date on which the resource was changed.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dc.provenance | A statement of any changes in ownership and custody of the resource since its creation that are significant for its authenticity, integrity, and interpretation.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dc.publisher | An entity responsible for making the resource available.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dc.references | A related resource that is referenced, cited, or otherwise pointed to by the described resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dc.temporal | Temporal characteristics of the resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dc.title | A name given to the resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dc.type | The nature or genre of the resource. Recommended best practice is to use a controlled vocabulary such as the DCMI Type Vocabulary [DCMITYPE].
To describe the file format, physical medium, or dimensions of the resource, use the Format element.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dc.valid | Date (often a range) of validity of a resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| DCS.dcssta | Error page parameter
This defines an error code web page so that Webtrends can identify it as a non-success page. Generally used to identify pages that contain 400 and 500 series return codes. As a result, Webtrends excludes these pages from its standard "Pages" report, to instead populate its standard "errors" report. Example: <meta name="DCS.dcssta" content="404"> |
Webtrends Parameters. | Proposal | |
| dcterms.abstract | A summary of the resource.
It must be accompanied by a |
[http://dublincore.org/documents/dcmi-terms/#terms-abstract DCMI
Metadata Terms] mapped according to Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
<meta name="description">
|
Proposal |
| dcterms.accessRights | Information about who can access the resource or an indication of its security status.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.accrualMethod | The method by which items are added to a collection.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.accrualPeriodicity | The frequency with which items are added to a collection.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.accrualPolicy | The policy governing the addition of items to a collection.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.alternative | An alternative name for the resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.audience | A class of entity for whom the resource is intended or useful.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.available | Date (often a range) that the resource became or will become available.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.bibliographicCitation | A bibliographic reference for the resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
The HTML attribute cite
|
Proposal |
| dcterms.collection | An aggregation of resources.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.conformsTo | An established standard to which the described resource conforms.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.contributor | An entity responsible for making contributions to the content of the resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.coverage | The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.created | Date of creation of the resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.creator | An entity primarily responsible for making the resource. Examples of a Creator include a person, an organization, or a service.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
In some cases redundant with the HTML built-in keyword author
|
Proposal |
| dcterms.date | A point or period of time associated with an event in the lifecycle of the resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.dateAccepted | Date of acceptance of the resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.dateCopyrighted | Date of copyright.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.dateSubmitted | Date of submission of the resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.description | An account of the resource. Description may include but is not limited to: an abstract, a table of contents, a graphical representation, or a free-text account of the resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
HTML built-in keyword description
|
Proposal |
| dcterms.educationLevel | A class of entity, defined in terms of progression through an educational or training context, for which the described resource is intended.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.extent | The size or duration of the resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.format | The file format, physical medium, or dimensions of the resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
To be limited to dimensions information. File format for the document is to be determined by server. Linked resources can be described by type attribute.
|
Proposal |
| dcterms.hasFormat | A related resource that is substantially the same as the pre-existing described resource, but in another format.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
The HTML link type keyword "alternate" used with "link" element:rel="alternate" href="URI of related resource"
|
Proposal |
| dcterms.hasPart | A related resource that is included either physically or logically in the described resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.hasVersion | A related resource that is a version, edition, or adaptation of the described resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
The HTML link type keyword "alternate" used with "link" element:rel="alternate" href="URI of related resource"
|
Proposal |
| dcterms.identifier | An unambiguous reference to the resource within a given context.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.instructionalMethod | A process used to engender knowledge, attitudes and skills, that the described resource is designed to support.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.isFormatOf | A related resource that is substantially the same as the described resource, but in another format.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
The HTML link type keyword "alternate" used with "link" element:rel="alternate" href="URI of related resource"
|
Proposal |
| dcterms.isPartOf | A related resource in which the described resource is physically or logically included.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.isReferencedBy | A related resource that references, cites, or otherwise points to the described resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.isReplacedBy | A related resource that supplants, displaces, or supersedes the described resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
The HTML link type keyword "alternate" used with "link" element:rel="alternate" href="URI of related resource"
|
Proposal |
| dcterms.isRequiredBy | A related resource that requires the described resource to support its function, delivery, or coherence.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.issued | Date of formal issuance (e.g., publication) of the resource. (DC doesn't spec a date format but the established practice is YYYY-MM-DD.)
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
(former <time pubdate> no longer considered due to the abort of @pubdate)
|
Proposal |
| dcterms.isVersionOf | A related resource of which the described resource is a version, edition, or adaptation.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
The HTML link type keyword "alternate" used with "link" element:rel="alternate" href="URI of related resource"
|
Proposal |
| dcterms.language | A language of the resource. Recommended best practice is to use a controlled vocabulary such as RFC 4646 [RFC4646].
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Redundant with the lang attribute on the html element. (Browsers pay attention to the lang attribute but not dcterms.language)
|
Proposal |
| dcterms.license | A legal document giving official permission to do something with the resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
The HTML <link> element with the keyword "license" as value of the rel attribute.
|
Proposal |
| dcterms.mediator | An entity that mediates access to the resource and for whom the resource is intended or useful.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.medium | The material or physical carrier of the resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.modified | Date on which the resource was changed. (DC doesn't spec a date format but the established practice is YYYY-MM-DD.)
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.provenance | A statement for any changes in ownership and custody of the resource since its creation that are significant for its authenticity, integrity, and interpretation.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.publisher | An entity responsible for making the resource available.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
publisher | Proposal |
| dcterms.references | A related resource that is referenced, cited, or otherwise pointed to by the described resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
cite attribute on specific quotes, if any.
|
Proposal |
| dcterms.relation | A related resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
If the relation comes from an internal reference or quote, dcterms.references should be preferred.
|
Proposal |
| dcterms.replaces | A related resource that is supplanted, displaced, or superseded by the described resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
The HTML link type keyword "alternate" used with "link" element:rel="alternate" href="URI of related resource"
|
Proposal |
| dcterms.requires | A related resource that is required by the described resource to support its function, delivery, or coherence.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.rights | Information about rights held in and over the resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
The HTML <link> element with the keyword "license" as value of the rel attribute, if referring to a legal license format.
|
Proposal |
| dcterms.rightsHolder | A person or organization owning or managing rights over the resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.source | A related resource from which the described resource is derived.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
The HTML link type keyword "alternate" used with "link" element:rel="alternate" href="URI of related resource" if documents are different versions. Otherwise, cite attribute.
|
Proposal |
| dcterms.spatial | Spatial characteristics of the resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
geographic-coverage | Proposal |
| dcterms.subject | The topic of the resource. | DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
HTML built-in keywords description or keywords
|
Proposal |
| dcterms.tableOfContents | A list of subunits of the resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
HTML built-in keywords description or keywords. Otherwise, a details-summary model which would provide user-readable information.
|
Proposal |
| dcterms.temporal | Temporal characteristics of the resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.title | A name given to the resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
HTML built-in element title (not to be confused with @title attributes specific to each element)
|
Proposal |
| dcterms.type | The nature or genre of the resource. | DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| dcterms.valid | Date (often a range) of validity of a resource.
It must be accompanied by a |
DCMI Metadata Terms mapped according to
Expressing Dublin Core metadata using HTML/XHTML meta and link elements |
Proposal | |
| detectify-verification | Used by the Detectify web vulnerability scanner as a domain verification key. The Detectify service will only consider the domain authenticated if it contains the "detectify-verification" meta tag, with the content set according to a per-customer token. | Documentation | Proposal | |
| designer | Credits the designer(s) responsible for the visual presentation of a website. | Documentation | Proposal | |
| entity | Allows for definitions of XML-style entities for substitution of references (defined as specially-named elements (e.g., use of data element and/or data-* attribute) or script tags) via inclusion of a JavaScript library. Library also supports inclusion of additional meta element entity definitions via iframe documents. | Documentation | Proposal | |
| EssayDirectory | Defines a custom description of websites listed in EssayDirectory. Example: <meta name="EssayDirectory" content="Helping students find legitimate essay services."> |
Documentation | Proposal | |
| fdse-description | Tag used by FDSE search software, allows different description to be displayed in fdse results to that shown in description | [2] | Proposal | |
| fdse-index-as | Tag used by FDSE search software, allows FDSE to index a page as url described here | [3] | Proposal | |
| fdse-keywords | Tag used by FDSE search software, allows different keywords to be used by FDSE to keywords tag | [4] | Proposal | |
| fdse-refresh | Tag used by FDSE search software, allows FDSE to ignore refresh meta tags | [5] | Proposal | |
| fdse-robots | Tag used by FDSE search software, allows different robots instructions to be sent to FDSE than that sent to other search engines eg: index no index pages for local search | [6] | Proposal | |
| FLBlogAuthor | Depicts whether author of the blog is lawfirm or FL author | FL Meta Names documentation | Proposal | |
| format-detection | Enables or disables automatic detection of possible phone numbers in a webpage in Safari on iOS. | Apple Safari HTML Reference | Proposal | |
| format-print | Store print media requirements for a page so a user agent can alert a user to unusual needs, such as special paper, before printing is to begin. | BrittleBit.org spec | Proposal | |
| fragment | Opts a webpage into the AJAX crawling scheme when it does not have a "#!" URL. The only valid content value is "!".
<meta name="fragment" content="!"> |
Google Crawable AJAX Specification | Proposal | |
| FSDateCreation | Mentions the date when this web page was created | FL Meta Names documentation | Proposal | |
| FSDatePublish | Mentions the date when this web page was created | FL Meta Names documentation | Proposal | |
| FSFLContent | Informs the Publisher tool whether this page contains any content or not. Valid values yes or no | FL Meta Names documentation | Proposal | |
| FSLanguage | Language of the content in the page. Example: US English or UK English, etc | FL Meta Names documentation | Proposal | |
| FSOnSitemap | Whether the page is accessible via the Sitemap link in the firmsite | FL Meta Names documentation | Proposal | |
| FSPageDescription | Description of the content of page | FL Meta Names documentation | Proposal | |
| FSPageName | Name of the page within a Findlaw firmsite | FL Meta Names documentation | Proposal | |
| FSSearchable | This tag mentions whether a certain page can be searched or not | FL Meta Names documentation | Proposal | |
| FSSection | Depicts whether a page is a Section Page or simple page. Section pages can have links to other pages | FL Meta Names documentation | Proposal | |
| FSWritertoolPageType | Page Type of a page in the firmsite. Page Type values help the Publisher toold in page creation | FL Meta Names documentation | Proposal | |
| gcterms.topicTaxonomy | Organize resources specifically for taxonomy-based topical browse or search structures on websites (ie: breadcrumbs / website information architecture). | [7] Government of Canada, Web Content Management System Metadata Application Profile. | Proposal | |
| geo.a1 | National subdivision (state, canton, region, province, prefecture) of civil address to which the page is related. For resources within the US and Canada, corresponds to the common 2-character State/Province codes.
<meta name="geo.a1" content="AB"> |
IETF Draft GeoTags.com RFC 4776 |
Proposal | |
| geo.a2 | County, parish, gun (JP), district (IN) of civil address to which the page is related.
<meta name="geo.a2" content="Warwickshire"> |
IETF Draft GeoTags.com RFC 4776 |
Proposal | |
| geo.a3 | City, township, shi (JP) of civil address to which the page is related.
<meta name="geo.a3" content="Calgary"> |
IETF Draft GeoTags.com RFC 4776 |
Proposal | |
| geo.country | Case-insensitive ISO 3166-1 alpha-2 code of a country to which the page is related.
<meta name="geo.country" content="de"> |
IETF Draft GeoTags.com ISO-3166-2 |
Proposal | |
| geo.lmk | A landmark or vanity address to which the page is related.
<meta name="geo.lmk" content="Auwaldstraße 11, 79110 Freiburg im Breisgau, Deutschland"> |
IETF Draft GeoTags.com |
Proposal | |
| geo.placename | Superseded by geo.lmk. Name of geographic place to which the page is related.
<meta name="geo.placename" content="London, Ontario"> |
IETF Draft GeoTags.com |
Proposal | |
| geo.position | Geographic position to which the page is related.
<meta name="geo.position" content="48.02682000000001;7.809769999999958"> |
IETF Draft (expired) GeoTags.com |
Proposal | |
| geo.region | Superseded by either geo.country alone or geo.country plus geo.a1. Name of geographic region to which the page is related. Content is specified by ISO-3166.
<meta name="geo.region" content="DE-BW"> |
IETF Draft GeoTags.com ISO-3166 |
Proposal | |
| globrix.bathrooms | Globrix property information: Number of bathrooms the property has | FAQ About the Globrix meta tags. | Proposal | |
| globrix.bedrooms | Globrix property information: Number of bedrooms the property has | FAQ About the Globrix meta tags. | Proposal | |
| globrix.condition | Globrix property information: Condition of the property e.g. 'renovated' | FAQ About the Globrix meta tags. | Proposal | |
| globrix.features | Globrix property information: Features of the property e.g. 'double glazing' | FAQ About the Globrix meta tags. | Proposal | |
| globrix.instruction | Globrix property information: Property to Buy or Rent | FAQ About the Globrix meta tags. | Proposal | |
| globrix.latitude | Globrix property information: The latitude of the property | FAQ About the Globrix meta tags. | Proposal | |
| globrix.longitude | Globrix property information: The longitude of the property | FAQ About the Globrix meta tags. | Proposal | |
| globrix.outsidespace | Globrix property information: External features of the property e.g. 'garden' | FAQ About the Globrix meta tags. | Proposal | |
| globrix.parking | Globrix property information: Parking available for property e.g. 'parking for 2 cars' | FAQ About the Globrix meta tags. | Proposal | |
| globrix.period | Globrix property information: Period of the property e.g. 'victorian terrace' | FAQ About the Globrix meta tags. | Proposal | |
| globrix.poa | Globrix property information: If the property price is only available on application | FAQ About the Globrix meta tags. | Proposal | |
| globrix.postcode | Globrix property information: Postcode of the property | FAQ About the Globrix meta tags. | Proposal | |
| globrix.price | Globrix property information: Price for the property | FAQ About the Globrix meta tags. | Proposal | |
| globrix.priceproximity | Globrix property information: The region of the attached price e.g. 'guide price of' | FAQ About the Globrix meta tags. | Proposal | |
| globrix.tenure | Globrix property information: The tenure of the property e.g. 'leasehold' | FAQ About the Globrix meta tags. | Proposal | |
| globrix.type | Globrix property information: Type of property e.g. 'semi-detatched house' | FAQ About the Globrix meta tags. | Proposal | |
| globrix.underoffer | Globrix property information: Indicates if the property is under offer | FAQ About the Globrix meta tags. | Proposal | |
| go-import | Defines a remote source code location and version control scheme for the Go programming language's toolchain. Content format: import-prefix vcs repo-root.
|
go tool documentation | Proposal | |
| Multiple purposes: Used to declare text that should not be translated by the Google Translate plugin (<meta name="google" value="notranslate"> will declare the whole page should not be translated, while <span class="notranslate"> is for text or paragraph areas you wish to not be translated. Used "[t]o tell Google not to show a Sitelinks search box when your site appears in the search results" (implement with content="nositelinkssearchbox") (already in use). Presumably, multiple meta elements named "google" should all be parsed but this is may not have been explicitly specified anywhere. |
"notranslate": Google blog post "nositelinkssearchbox": Google on Structured Data > Sitelinks Search Box |
Nontranslation: Proposal No Sitelinks search box: Proposed | ||
| google-play-app | Promoting Apps with Smart App Banners | [8] Smart banners for Google Apps | Proposal | |
| google-site-verification | Used to verify ownership for Webmaster Tools. | Google documentation | Proposal | |
| gwt:property | Used to specify the locale client property | Locales in GWT | Proposal | |
| handheldfriendly | Informs the BlackBerry browser that the content contained within the document is designed for small screens. | BlackBerry (handheldfriendly "largely obsolete") | Proposal | |
| icas.datetime | A point or period of time associated with an event in the lifecycle of the resource represented in terms of an ICAS date and time format of unspecified information density (may include full, long, medium, short, or compressed forms). | a preliminary specification in the aaticas group on LinkedIn (http://www.linkedin.com/groups/aaticas-4034149). after a period of review, a specification for AAT ICAS meta keywords for HTML(5) will be referenced on an AAT ICAS area of the aatideas.org web site. | Proposal | |
| icas.datetime.abbr | A point or period of time associated with an event in the lifecycle of the resource represented in terms of an ICAS abbreviated format such as "d2M03 t969". | a preliminary specification in the aaticas group on LinkedIn (http://www.linkedin.com/groups/aaticas-4034149). after a period of review, a specification for AAT ICAS meta keywords for HTML(5) will be referenced on an AAT ICAS area of the aatideas.org web site. | Proposal | |
| icas.datetime.day | A point or period of time associated with an event in the lifecycle of the resource represented in terms of ICAS day-of-year format such as "2012 day 333 t969". | a preliminary specification in the aaticas group on LinkedIn (http://www.linkedin.com/groups/aaticas-4034149). after a period of review, a specification for AAT ICAS meta keywords for HTML(5) will be referenced on an AAT ICAS area of the aatideas.org web site. | Proposal | |
| icas.datetime.long | A point or period of time associated with an event in the lifecycle of the resource represented in terms of ICAS long date format such as "UCN 12012 M03 Blue ❀ day 333 ❀ IDC zone(UT) t969 tt189". example <meta name="icas.datetime.long" content="UCN 12012 M03 Blue ❀ day 333 ❀ IDC zone(UT) t969 tt189"/> | a preliminary specification in the aaticas group on LinkedIn (http://www.linkedin.com/groups/aaticas-4034149). after a period of review, a specification for AAT ICAS meta keywords for HTML(5) will be referenced on an AAT ICAS area of the aatideas.org web site. | Proposal | |
| icbm | Defines geographic position to which page is related to. The acronym stands for ICBM Intercontinental Ballistic Missile - an old, humorous allusion to the possible use of such coordinates. Example: <meta name="ICBM" content="47.0667, 15.4500" /> |
GeoURL documentation | Proposal | |
| IE_RM_OFF | If set to "true", disables Internet Explorer 11 Reading View button adjacent to address bar when the page is detected to have content suitable for Reading View. This is intended for pages that are not articles and are not intended to be read in IE 11 Reading View. | Microsoft: Reading View Guidelines and Information In the Code tab, at the bottom where Opt Out is read. | Proposal
| |
| itemsPerPage | Used to identify the number of search results returned per page. | OpenSearch Specification | Proposal | |
| keywords-not | Like keywords but instead keywords-not support Boolean NOT searches; useful for metaphors, satire/parody, and pages that say "this page is not about subject x" which therefore would be erroneously excluded by a NOT search against x. | BrittleBit.org spec | Proposal | |
| meta_date | The date used to indicate that the Metadata has been prepared and/or reviewed and approved by the Metadata Unit. Its purpose is administrative. (Used by "Autonomy".) | Health Canada Web Metadata Application Profile March 2009 | Proposal | |
| microtip | Specifies the cryptocurrency address (bitcoin, etc.) for sending tips to the people responsible for creating this page's content. This tag is used by various browser plugins that want to compensate the site's creators. Since it's microtipping instead of micropayments, there is no need to specify an amount. Example: <meta name="microtip" content="[bitcoin-address]"> Note: there can be multiple instances of this metatag on a page. |
For full specification, see: http://autotip.io/docs/microtip-meta-tag | Proposal | |
| mobile-agent | Specifies the mobile-compatible url of the web page. Used by mobile browsers and search engines to redirect mobile phone visitors to the proper mobile page. The following properties can be used in the value of the content attribute: <meta name="mobile-agent" content="format=html5; url=http://3g.sina.com.cn/"> |
Baidu Mobile SEO | Proposal | |
| mobile-web-app-capable | Sets whether a web application can be added standalone to a home screen and launched in fullscreen mode. Also proposed as a vendor-neutral version of apple-mobile-web-app-capable. | Add to Homescreen - Google Chrome Mobile — Google Developers (though a WHATWG or W3C spec would be preferred) | apple-mobile-web-app-capable (vendor specific synonym) | Proposal |
| mobileoptimized | Controls layout behavior in older versions of Internet Explorer (e.g., 6.5). | Microsoft Windows Mobile 6.5 documentation | Proposal | |
| msapplication-config | "Pinned Sites" in Windows 8
The "msapplication-config" metadata defines the path to a browser configuration file, letting you set pinned sites customizations (such as tile background, badge updates and notifications) with this external XML file rather than metadata within the HTML markup of webpages. <meta name="msapplication-config" content="IEconfig.xml" /> Note Without this metadata, IE11 looks for a default "browserconfig.xml" in the root directory of the server. |
Browser configuration schema reference | Proposal | |
| msapplication-navbutton-color | "Jump List" or "Pinned Sites" in Windows 7
The "msapplication-navbutton-color" metadata define the custom color of the Back and Forward buttons in the Pinned Site browser window. Any named color, or hex color value is valid. <meta name="msapplication-navbutton-color" content="#FF3300" /> |
Declaring Pinned Site Metadata | Proposal | |
| msapplication-notification | "Pinned Sites" and "Live Tiles" in Windows 8.1
Used to make pinned sites on the start screen into live tiles. Usage: <META name="msapplication-notification" content="cycle=7;frequency=60;polling-uri=http://www.example.com/notifications.xml" /> |
Pinned site metadata reference | Proposal | |
| msapplication-square150x150logo | msapplication-square150x150logo
Specifies the image to use as the wide tile, which is 310x150 pixels at 100% scaling. <meta name="msapplication-square150x150logo" content="images/logo.png"> Note The msapplication-square150x150logo value is supported as of IE11 Preview and applies to tiles pinned to the Windows Start screen. |
Pinned site metadata reference | Proposal | |
| msapplication-square310x310logo | msapplication-square310x310logo
Specifies the image to use as the large tile, which is 310x310 pixels at 100% scaling. <meta name="msapplication-square310x310logo" content="images/largelogo.png"> Note The msapplication-square310x310logo value is supported as of IE11 Preview and applies to tiles pinned to the Windows Start screen. |
Pinned site metadata reference | Proposal | |
| msapplication-square70x70logo | msapplication-square70x70logo
Specifies the image to use as the small tile, which is 70x70 pixels at 100% scaling. <meta name="msapplication-square70x70logo" content="images/tinylogo.png"> Note The msapplication-square70x70logo value is supported as of IE11 Preview and applies to tiles pinned to the Windows Start screen. |
Pinned site metadata reference | Proposal | |
| msapplication-starturl | "Jump List" or "Pinned Sites" in Windows 7
The "msapplication-starturl" metadata contains the root URL of the application. The start URL can be fully qualified, or relative to the current document. Only HTTP and HTTPS protocols are allowed. If this element is missing, the address of the current page is used instead. <meta name="msapplication-starturl" content="./" /> |
Declaring Pinned Site Metadata | Proposal | |
| msapplication-tap-highlight | Link highlighting in Internet Explorer
The "msapplication-tap-highlight" meta tag can be used to disable automatic highlighting of tapped links in Internet Explorer. Applies to IE10 on Windows Phone 8 and IE11 on Windows 8.1. <meta name="msapplication-tap-highlight" content="no" /> |
Link highlighting | Proposal | |
| msapplication-task | "Jump List" or "Pinned Sites" in Windows 7
Jump List items act as entry points into the website even when the browser is not running. A Jump List can contain commonly used destinations and tasks. Some items apply to the whole site, and some apply only to specific users. For example, to add a single task called "Check Order Status" specify a meta element in the head of your webpage, as follows: <META name="msapplication-task" content="name=Check Order Status;
action-uri=./orderStatus.aspx?src=IE9;
icon-uri=./favicon.ico" />
|
Tasks in Jump List | Proposal | |
| msapplication-TileColor | The "msapplication-TileColor" metadata define the background color of a tile in Pinned Sites in Windows 8. The tile color can be specified as a hex RGB color using CSS’s #rrggbb notation, via CSS color names, or by the CSS rgb() function.
<meta name="msapplication-TileColor" content="#d83434"/> |
High Quality Visuals for Pinned Sites in Windows 8 | Proposal | |
| msapplication-TileImage | The "msapplication-TileImage" metadata define the path to an image to be used as background for a tile in Pinned Sites in Windows 8. Tile images must be square PNGs 144px by 144px.
<meta name="msapplication-TileImage" content="images/benthepcguy-144.png" /> |
High Quality Visuals for Pinned Sites in Windows 8 | Proposal | |
| msapplication-tooltip | "Jump List" or "Pinned Sites" in Windows 7
The "msapplication-tooltip" metadata provides additional tooltip text that appears when you hover over the Pinned Site shortcut in the Windows Start menu or on the desktop. <meta name="msapplication-tooltip" content="Channel 9 Podcasts" /> |
Declaring Pinned Site Metadata | Proposal | |
| msapplication-wide310x150logo | msapplication-wide310x150logo
Specifies the image to use as the medium tile, which is 150x150 pixels at 100% scaling. <meta name="msapplication-wide310x150logo" content="images/widelogo.png"> Note The msapplication-wide310x150logo value is supported as of IE11 Preview and applies to tiles pinned to the Windows Start screen. |
Pinned site metadata reference | Proposal | |
| msapplication-window | "Jump List" or "Pinned Sites" in Windows 7
The "msapplication-window" metadata sets the initial size of the Pinned Site window when it is launched for the first time. However, if the user adjusts the size of the window, the Pinned Site retains the new dimensions when it is launched again.
The following properties can be used in the value of the
<meta name="msapplication-window" content="width=1024;height=768" /> |
Declaring Pinned Site Metadata | Proposal | |
| MSSmartTagsPreventParsing | Prevent a Microsoft browser from adding a certain kind of content to a page because users could be confused into thinking the added content was part of the original page. (It's likely only relatively few copies of the browser, a beta release never finalized, are still in the installed Win base, but the base is so large that even relatively few would still be a significant absolute quantity.) This tag is used by Google: Custom Search Help: Meta Tags, as accessed 1-8-16. And "<meta content='true' name='MSSmartTagsPreventParsing'/>" appeared (with internal quote marks as singles) in the source code for <[9]>, as accessed 4-27-09. |
BrittleBit.org spec | Proposal | |
| msvalidate.01 | One of the verification elements used by Bing. | Bing Webmaster Tools | Proposal | |
| nonfiction | To reduce the "fake news" problem, this lets well-meaning page authors label satire and parody appropriately in metatags although unlabeled in content (not explicitly labeling being common in satire and parody). Characterize the principal content of the page as nonfiction, fiction, mixed, or other. This way, other websites and users needn't be fooled. | BrittleBit.org spec | fiction (antonym; see spec for usage) | Proposal |
| norton-safeweb-site-verification | Used to verify ownership of Website for Norton SafeWeb. | Norton SafeWeb Help Documentation | Proposal | |
| origin | The origin meta tag is used to indicate the original source of a document. | The origin meta tag | Proposed | |
| origin-trials | Used to enable experimental browser features for sites which are registered to participate in experimental trials. | Experimental Framework Trial Token Structure | Proposal | |
| p:domain_verify | Used to register a site's domain with Pinterest as a "verified domain".
Example:
|
Pinterest Help Article | Proposal | |
| page-version | When a page uploaded two or more times with the same last-modification date (per dc.modified, dcterms.modified, or article:modified_time metatag), distinguishing different uploads even on the same date can be done with the page-version metatag. | BrittleBit.org spec | Proposal | |
| pingdom | Used by Pingdom monitoring services as a heartbeat verification. The heartbeat service will only consider the request successful if it contains the "pingdom" meta tag, with the content set according to a per-customer key.
Example: |
Proposal | ||
| Used to block pinterest from linking to content on the URL.
Example: |
Pinterest Help Article | Proposal | ||
| prism:alternateTitle | An alternate title or alternate headline for a resource that may be used in a table of contents, a popup etc. and can vary with platform. | PRISM Basic Metadata Specification V3.0 | Proposal | |
| pro | Signify expertise as judged by an authority. Counterpart to pro-auth (which see). Useful to search engines and Web directories. | BrittleBit.org spec | Proposal | |
| pro-auth | Signify an authority, subject to search engine's or directory's judgment of importance and credibility (the judgment could be by a human working for a search engine), so the authority's listing of experts can carry weight, making search results more useful. Counterpart to pro (which see). Supported also by pro-auth-field (which see) and pro-auth-fragment (which see). |
BrittleBit.org spec | Proposal | |
| pro-auth-field | Signify an authority's claimed field of expertise, importance and validity to be judged by search engine or directory. Supports pro-auth (which see). | BrittleBit.org spec | Proposal | |
| pro-auth-fragment | Signify which links from authority are links to experts, as distinct from other links. Supports pro-auth (which see). | BrittleBit.org spec | Proposal | |
| rating | The Restricted to Adults label (RTA) provides a way for adult oriented websites to indicate that their content is off limits to children. RTA was introduced in 2006 and is currently used by a large number of adult web content providers. RTA is recognized by all major parental control filters.
Example: <meta name="RATING" content="RTA-5042-1996-1400-1577-RTA" /> |
RTA documentation | Proposal | |
| referrer | Controls whether the user agent includes the Referer header in HTTP requests originating from this document | Referrer Policy | referer | Proposal |
| RepostUsAPIKey | Used to verify ownership of Website for Repost syndication service | Meta Headers used by Repost | Proposal | |
| ResourceLoaderDynamicStyles | MediaWiki's ResourceLoader uses this name with content set to the empty string. The purpose is to mark the DOM position before which dynamic styles should be added.
|
ResourceLoaderDynamicStyles | Proposal | |
| review_date | The date a resource is scheduled for review by content creator in order to determine if it should be archived, updated or retained as is. | Health Canada Web Metadata Application Profile March 2009 | Proposal | |
| revision | The revision of this page as reported by an underlying Version Control System. This is a free format string. | Meta Revision Specification | Proposal | |
| revisit-after | revisit-after is used to tell search engines how often to recrawl the page. To our knowledge only one search engine has ever supported it, and that search engine was never widely used — at this point, it is nothing more than a good luck charm. | Google documentation | Proposal | |
| rights | Assert legal rights for the page in a machine-parsable format. Rights could include those in copyright, for trade secrets, and in other intellectual property. Talk |
BrittleBit.org spec | Proposal | |
| rights-standard | The purpose is to enable search engines and other cataloging services to compile the types of rights allocated to the work. (Does any search engine actually implement this? hsivonen 07:34, 14 July 2011 (UTC))
This keyword does not provide, remove or alter any legal protections or designations. Format: <meta name="rights-standard" content="element id;rights" />
|
Spec | Redundant with Microdata vocabulary for licensing works. | Proposal |
| robots | A comma-separated list of operators explaining how search engine crawlers should treat the content. This meta name is already supported by every popular search engine. Possible values are "noarchive" to prevent cached versions, "noindex" to prevent indexing, and "nofollow" works as the link rel value with the same name. The content value "NOODP" has been offered elsewhere, so I'm proposing it here. It blocks robots from using Open Directory Project descriptions of a website instead of Web pages' own meta descriptions. It may have been introduced by Microsoft. The content value "NOYDIR" has been offered by Yahoo, so I'm proposing it here. It blocks Yahoo's robot from using the Yahoo directory's descriptions of a website instead of Web pages' own meta descriptions. Whether any other robot supports this is unknown but possibly no other search engine uses Yahoo's directory anyway. |
About the Robots <META> tag; NOODP value: Google, Yahoo, NOYDIR value: Yahoo, as accessed 4-28-09 | baiduspider (for targeting Baidu or Baiduspider only) citeseerxbot (for targeting CiteSeerX only) googlebot (for targeting Googlebot only) googlebot-mobile (for targeting Googlebot-Mobile) ia_archive (for targeting Internet Archive (Wayback Machine) or Alexa only) msnbot (for targeting Microsoft or Bing only) slurp (for targeting Yahoo or slurp only) teoma (for targeting TEOMA or Ask.com only) |
Proposal |
| rpuPlugin | Version of installed Repost syndication service plugin | Meta Headers used by Repost | Proposal | |
| rqid | Request identifier of request that generated this page. | RequestID | Proposal | |
| shareaholic:analytics | Enables or disables Shareaholic Analytics for use with the Shareaholic Content Amplification system | Shareaholic CAS Specification | Proposal | |
| shareaholic:article_author | A URL to the profile of the author of the content of the webpage for use with the Shareaholic Content Amplification system | Shareaholic CAS Specification | Proposal | |
| shareaholic:article_author_name | Contains the name of the author of the content of the webpage for use with the Shareaholic Content Amplification system | Shareaholic CAS Specification | Proposal | |
| shareaholic:article_modified_time | When the article was last modified for use with the Shareaholic Content Amplification system | Shareaholic CAS Specification | Proposal | |
| shareaholic:article_published_time | When the article was first published for use with the Shareaholic Content Amplification system | Shareaholic CAS Specification | Proposal | |
| shareaholic:article_visibility | Specifies whether a webpage should be publicly recommendable for use with the Shareaholic Content Amplification system | Shareaholic CAS Specification | Proposal | |
| shareaholic:drupal_version | Specifies Shareaholic for Drupal module version for use with the Shareaholic Content Amplification system | Shareaholic CAS Specification | Proposal | |
| shareaholic:image | An image URL which represents your webpage for use with the Shareaholic Content Amplification system | Shareaholic CAS Specification | Proposal | |
| shareaholic:keywords | Keywords associated with the content of a webpage for use with the Shareaholic Content Amplification system | Shareaholic CAS Specification | Proposal | |
| shareaholic:language | Language of the content of the webpage for use with the Shareaholic Content Amplification system | Shareaholic CAS Specification | Proposal | |
| shareaholic:outstreamads | Enables or disables Shareaholic Outstream Ads for use with the Shareaholic Content Amplification system | Shareaholic CAS Specification | Proposal | |
| shareaholic:shareable_page | Specifies whether a webpage should be publicly shareable for use with the Shareaholic Content Amplification system | Shareaholic CAS Specification | Proposal | |
| shareaholic:site_id | Shareaholic Site ID for the website for use with the Shareaholic Content Amplification system | Shareaholic CAS Specification | Proposal | |
| shareaholic:site_name | The name which should be displayed for the overall site for use with the Shareaholic Content Amplification system | Shareaholic CAS Specification | Proposal | |
| shareaholic:url | The canonical URL of your webpage that will be used as its permanent ID for use with the Shareaholic Content Amplification system | Shareaholic CAS Specification | Proposal | |
| shareaholic:wp_version | Specifies Shareaholic for WordPress plugin version for use with the Shareaholic Content Amplification system | Shareaholic CAS Specification | Proposal | |
| signet:authors | Authors of a page for use with javascript signet library | Signet Revision Specification | Proposal | |
| signet:links | links to related pages, for use with the javascript signet library | Signet Revision Specification | Proposal | |
| skype_toolbar | Prevents the Skype browser extension from automatically seeking through the page and replacing telephone numbers (or any number the program's algorithm thinks is a telephone number) with its own custom presentation that allows direct invocation of the Skype program to call the telephone number.
Example: <meta name="skype_toolbar" content="skype_toolbar_parser_compatible" /> |
Skype Info | Proposal | |
| startIndex | Used to identify the index of the first search result in the current set of search results. | OpenSearch Specification | Proposal | |
| startver | Used to verify WebApps for JokeNetwork's Start!-WebApp | JokeNetwork's Start Documentation | Proposal | |
| subject-datetime | Identify the principal datetime ranges of the subject of the page’s content, such as the dates of an historical event. | BrittleBit.org spec | page-datetime datetime-coverage datetime-coverage-start datetime-coverage-end datetime-coverage-vague |
Proposal |
| subject-system | Where another metatag provides a subject for the page, that subject should be selected in accordance with a standard system for classifying subjects, such as one used for academic or public libraries of books. This metatag identifies the system in use for the current page, using a standard controlled vocabulary of system identifiiers. | BrittleBit.org spec | subj-. . . or subj-* (namespace not approved thus synonym would be "subj-" plus whatever is after hyphen in token) | Proposal |
| theme-color | Indicates a color associated with the web site's theme. Web browsers might use this color to theme their UI to be consistent with the web site's color scheme. Usage: |
Documentation | Proposal | |
| thumbnail | The full URL of a file that provides a thumbnail for the HTML page. (Note: This violates HTML5, section 4.2.5.2, which says this, because the value is a URL, must be a link element and not a meta element, but Google already recommends and parses this as a meta element.) |
Google page, as accessed Jan. 2, 2016. Original date unknown. | Proposed | |
| topper | Notify website visitors of later changes; easier for website authors to maintain than RSS or Atom. | BrittleBit.org spec | Proposal | |
| topper-major | Limit use of topper to major changes. | BrittleBit.org spec | Proposal | |
| topper-minor | In use of topper, include minor changes. | BrittleBit.org spec | Proposal | |
| totalResults | Used to identify the number of search results available for the current search. | OpenSearch Specification | Proposal | |
| translator | The translator meta tag is used to give credit to, and provide contact info for, the translator of a document. | The translator meta tag | Proposed | |
| twitter:app:country | If your application is not available in the US App Store, you must set this value to the two-letter country code for the App Store that contains your application. | Proposal | ||
| twitter:app:id:googleplay | String value, and should be the numeric representation of your app ID in Google Play. | Proposal | ||
| twitter:app:id:ipad | String value, should be the numeric representation of your app ID in the App Store. | Proposal | ||
| twitter:app:id:iphone | String value, should be the numeric representation of your app ID in the App Store. | Proposal | ||
| twitter:app:name:googleplay | Name of your Android app | Proposal | ||
| twitter:app:name:ipad | Name of your iPad optimized app | Proposal | ||
| twitter:app:name:iphone | Name of your iPhone app | Proposal | ||
| twitter:app:url:googleplay | Your app's custom URL scheme. | Proposal | ||
| twitter:app:url:ipad | Your app's custom URL scheme. | Proposal | ||
| twitter:app:url:iphone | Your app's custom URL scheme. | Proposal | ||
| twitter:card | The card type, which will be one of "summary", "photo", "app", or "player". | Proposal | ||
| twitter:creator | @username for the content creator / author. | Proposal | ||
| twitter:creator:id | Twitter ID for the content creator / author. | Proposal | ||
| twitter:data1 | String value; value for labels such as price, items in stock, sizes, etc | Proposal | ||
| twitter:data2 | String value; value for labels such as price, items in stock, sizes, etc | Proposal | ||
| twitter:description | A description of the content in a maximum of 200 characters. | Proposal | ||
| twitter:domain | Short URL assigned by Twitter to a website. | Proposal | ||
| twitter:image | A URL to the image representing the content. | Proposal | ||
| twitter:image0 | A URL to the image representing the first photo in your gallery. | Proposal | ||
| twitter:image1 | A URL to the image representing the second photo in your gallery. | Proposal | ||
| twitter:image2 | A URL to the image representing the third photo in your gallery. | Proposal | ||
| twitter:image3 | A URL to the image representing the fourth photo in your gallery. | Proposal | ||
| twitter:image:height | The height of the image representing the content. | Proposal | ||
| twitter:image:src | URL of image to use in the card. Image must be less than 1MB in size. | Proposal | ||
| twitter:image:width | The width of the image representing the content. | Proposal | ||
| twitter:label1 | String value; label such as price, items in stock, sizes, etc | Proposal | ||
| twitter:label2 | String value; label such as price, items in stock, sizes, etc | Proposal | ||
| twitter:player | HTTPS URL to iframe player. This must be a HTTPS URL which does not generate active mixed content warnings in a web browser | Proposal | ||
| twitter:player:height | Height of IFRAME specified in twitter:player in pixels | Proposal | ||
| twitter:player:stream | URL to raw stream that will be rendered in Twitter's mobile applications directly | Proposal | ||
| twitter:player:stream:content_type | The MIME type/subtype combination that describes the content contained in twitter:player:stream | Proposal | ||
| twitter:player:width | Width of IFRAME specified in twitter:player in pixels | Proposal | ||
| twitter:site | @username for the website used in the card footer. | Proposal | ||
| twitter:site:id | Twitter ID for the website used in the card footer. | Proposal | ||
| twitter:title | The title of the content as it should appear in the card. | Proposal | ||
| twitter:url | Canonical URL of the card content. | Proposal | ||
| typemetal.formatprefs | Per-file HTML formatting preferences used by the TypeMetal HTML editor | TypeMetal User Guide | Proposal | |
| verify-v1 | Superseded by google-site-verification. Legacy verification for Google Sitemaps. | Inside Google Sitemaps: More about meta tag verification | Proposal | |
| version | The version of a web application according to the Semantic Versioning specification Example: |
Documentation | deprecated `page-version` due to backward compatibility | Proposal |
| vfb-version | Specifies a Visual Form Builder plugin version for Wordpress. | Visual Form Builder Documentation and specs | Proposal | |
| viewport | Provides a way for documents to specify (using markup rather than CSS) the size, zoom factor, and orientation of the viewport that is used as the base for the document's initial containing block. The following properties can be used in the value of the content attribute:
Examples: <meta name="viewport" content="initial-scale=1.0"> <meta name="viewport" content="width=480, initial-scale=2.0, user-scalable=1"> |
CSS Device Adaptation | Proposal | |
| web_author | Credits the developer(s) responsible for the technical design of a website. | Documentation | designer - for visual presentation | Proposal |
| witget | Used to verify ownership for Witget.com.
Example <meta name="witget" content="XXXXXXXXXXXXXXXXXXXXXX"> |
Witget manual | Proposal | |
| wot-verification | Used to verify ownership of WOT (Web Of Trust) | WOT's verify your site wiki page | Proposal | |
| wt.ac | Advertising Click parameter
When a visitor to your site clicks on an ad, that action is referred to as an Ad Click. The following META tag tracks advertising clicks: <META NAME="WT.ac" CONTENT="name"> Defines the name of the advertisement clicked to reach a particular web page. The Ad Click must contain an external redirect back to the client. The redirect needs to include the necessary code to generate a hit to the SDC server. You can designate multiple Advertising Clicks using semicolons. Examples: <a href="file111.html?WT.ac=CONTENT111"> <a href="file222.html?WT.ac=CONTENT222"> The name of the advertisement clicked to reach a particular web page. To capture this information with DCS, the Advertising Click must contain an external redirect back to the client. The redirect needs to include the necessary code to generate a hit to the DCS. The maximum length for each name is 64 bytes. |
Webtrends Parameters | Proposal | |
| wt.ad | Advertising View parameter
Visitors often view advertisements that they do not necessarily click on. You can use On-Site Advertising to determine the number of visitors to your web site who view particular ads. With this feature you can produce advertising reports for each of your clients. If you are selling advertising space on your web site, for example, you can collect traffic statistics to help determine pricing schedules. The following META tag tracks advertising views: <meta name="WT.ad" content="My content"> An Ad View occurs when a visitor views a page containing an ad. An ad is a link or graphic that contains an Ad Click parameter in the query portion of it's URL. |
Webtrends Parameters | Proposal | |
| wt.cg_n | Name of the Content Group
Used to configure the appropriate Webtrends advanced feature. These are just some of the more popular ones. These appear in your META tags. – showing you the web page, the source (meta tag), the log files entry and the subsequent WT report. Example: <meta name="wt.cg_n" content="My content"> |
Webtrends Parameters | Proposal | |
| wt.cg_s | Name of Content Sub-Group
Used to configure the appropriate Webtrends advanced feature. These are just some of the more popular ones. These appear in your META tags. – showing you the web page, the source (meta tag), the log files entry and the subsequent WT report. Example: <meta name="wt.cg_s" content="My content"> |
Webtrends Parameters | Proposal | |
| wt.mc_id | Identifies the ID of the marketing campaign
To attract new students, a university launches a marketing campaign by sending recruitment email to all graduating high school seniors in a metropolitan area. The email links to a special landing page in the university’s web site, containing the following META tag to track marketing campaigns. Example: <META NAME="WT.mc_id" CONTENT="1X2GG34"> You may use this parameter on the URL. Example: <a href="link?WT.mc_id=1X2GG34"> The Campaign ID 1X2GG34 represents recruits to be contacted by email |
Webtrends Parameters | Proposal | |
| WT.si_n | Scenario analysis parameter - scenario name
This defines a scenario name for the page or set of pages to be included in the scenario. This in turn produces a funnel type report in Webtrends. Example: <meta name="WT.si_n" content="my_scenario_name"> |
Webtrends Parameters. | Proposal | |
| WT.si_p | Scenario analysis parameter - scenario step name
This defines a scenario step name for the page or set of pages to be included in the scenario. This in turn produces a funnel type report in Webtrends. It works when paired with metedata tag name WT.si_n. Example: <meta name="WT.si_p" content="my_scenario_step_name"> |
Webtrends Parameters. | Proposal | |
| WT.si_x | Scenario analysis parameter - scenario step number
This defines a scenario step number for the page or set of pages to be included in the scenario. This in turn produces a funnel type report in Webtrends. It works when paired with metedata tag name WT.si_n, and as an alternative to Wt.si_p. Example: <meta name="WT.si_x" content="my_scenario_step_number"> |
Webtrends Parameters. | Proposal | |
| wt.sv | Tracking Servers parameter
If your site is hosted on multiple servers, a server cluster, or a server farm, and you want to evaluate the performance of your load balancer, Webtrends can track page views for each server. To do so, populate the following META tag on all pages on each server: Example: <meta name="WT.sv" content="My Server"> Defines the name of the machine that serves the web page. If you have two servers (Server1 and Server2), you would make two copies of the META tag and designate CONTENT=“Server1” for deployment to pages on the first server and CONTENT=“Server2” for deployment to the same pages on the second server. For a server farm, you can extract the value of the built-in server name and dynamically assign it to the META tag using server-side scripting. Example: <meta name="WT.sv" content="Server1"> <meta name="WT.sv" content="Server2"> An Ad View occurs when a visitor views a page containing an ad. An ad is a link or graphic that contains an Ad Click parameter in the query portion of it's URL. |
About WT.ad. | Proposal | |
| wt.ti | Tracking Page Titles
You may want to modify a page title before sending it to Webtrends in the following cases:
Unless you modify the page titles, all pages have the same title in the reports.
Even though URLs are displayed in addition to page title, the entire URL cannot be depended upon to distinguish one page from another. Use server-side scripts to change the title to something that reflects the content of the pages so that you can identify them in reports. Next, pass the customized page titles to Webtrends, using the following META tag: <META NAME="WT.ti" CONTENT="title"> Defines the name of the title for this page. |
Webtrends Parameters | Proposal | |
| y_key | Used to verify ownership for Yahoo! Site Explorer | Yahoo! documentation | Proposal | |
| yandex-verification | Used to verify ownership for Yandex Webmaster. | Yandex Webmaster ownership verification | Proposal | |
| ZOOMCATEGORY | Category of page to be grouped in Wrensoft Zoom Search Engine. | Wrensoft Zoom Meta Documentation | Proposal | |
| ZOOMDESCRIPTION | Alternative page description for Wrensoft Zoom Search Engine. | Wrensoft Zoom Meta Documentation | Proposal | |
| ZOOMIMAGE | URL to image to be displayed alongside result in Wrensoft Zoom Search Engine. | Wrensoft Zoom Meta Documentation | Proposal | |
| ZOOMPAGEBOOST | Page boost factor to increase or decrease the relevance of page in Wrensoft Zoom Search Engine. | Wrensoft Zoom Meta Documentation | Proposal | |
| ZOOMTITLE | Alternative page title for Wrensoft Zoom Search Engine. | Wrensoft Zoom Meta Documentation | Proposal | |
| ZOOMWORDS | Additional keywords to be indexed for Wrensoft Zoom Search Engine. | Wrensoft Zoom Meta Documentation | Proposal |
Proposals That Don't Meet the Requirements For a Registration
Note that these proposals can be moved back to the registry table if the problems listed in the rightmost column of this table are addressed.
| Keyword | Brief description | Link to specification | Synonyms | Status | Registration requirement failure |
|---|---|---|---|---|---|
| blogcatalog | Used to verify ownership of Blog Catalog.com | Blog catalog site | Incomplete proposal | Claimed spec link is not a link to a spec | |
| created | The datetime at which the document was created. The value is an ISO8601 date. The date MUST follow the W3C Profile of ISO 8601 with a granularity of "Complete date:" or finer. The BBC use this name. | Incomplete proposal | Lacks link to a spec | ||
| expires | meta name='expires' defines the expiration date of the page. This can be used for web pages in preparation for an upcoming event, e.g. a registration form for an exposition or competition, or other cases with a pre-set date when the document will no longer be valid, e.g. a product offer in a special sale or a support page for a product known not to be supported anymore from a given time onward.
Search engines should respond to this meta tag in a reasonable way, i.e. by removing the page from their main search results after the expiration date (possibly still returning the result in a special search for expired pages as long as the page exists and is not explicitly excluded via The content attribute should define the expiration date in accordance with http://www.w3.org/TR/NOTE-datetime . The meta tag should not be used for pages without expiration date. However, for historical reasons, search engines should also interpret other date formats where possible and should be prepared to find values such as "", "0", "no" and "never". Such non-date values are to be interpreted as no expiration date. Correctly formatted example: This tag is not to be confused with and has a different meaning than |
Incomplete proposal | Lacks link to a spec | ||
| fb:admins | Open Graph Protocol by Facebook developers | Facebook developers | Incomplete proposal | The spec specifies this to be a value of the property attribute--not a meta keyword | |
| fb:page_id | Open Graph Protocol by Facebook developers | Facebook developers | Incomplete proposal | The spec specifies this to be a value of the property attribute--not a meta keyword | |
| gm-gpx-v | Wordpress Plugin Google Maps GPX Viewer | Google Maps GPX Viewer | Incomplete proposal | Claimed spec link is not a link to a spec | |
| google-translate-customization | Used to verify ownership for Website Translator. <meta name="google-translate-customization" content="Your Website Code Goes Here. Generated When Adding The Google Translate Plugin To Your Site" /> | Incomplete proposal | Lacks link to a spec | ||
| nextgen | Used for nextgen gallery plugin in wordpress | Alexa FAQ About this meta attribute Reference | Incomplete proposal | Unrelated spec link | |
| nibbler-site-verification | Used to verify ownership of Nibbler site | Nibbler site | Incomplete proposal | Claimed spec link does not link to a spec | |
| og:description | Open Graph Protocol by Facebook developers | Facebook developers | Incomplete proposal | The spec specifies this to be a value of the property attribute--not a meta keyword | |
| og:image | Open Graph Protocol by Facebook developers | Facebook developers | Incomplete proposal | The spec specifies this to be a value of the property attribute--not a meta keyword | |
| og:site_name | Open Graph Protocol by Facebook developers | Facebook developers | Incomplete proposal | The spec specifies this to be a value of the property attribute--not a meta keyword | |
| og:title | Open Graph Protocol by Facebook developers | Facebook developers | Incomplete proposal | The spec specifies this to be a value of the property attribute--not a meta keyword | |
| og:type | Open Graph Protocol by Facebook developers | Facebook developers | Incomplete proposal | The spec specifies this to be a value of the property attribute--not a meta keyword | |
| og:url | Open Graph Protocol by Facebook developers | Facebook developers | Incomplete proposal | The spec specifies this to be a value of the property attribute--not a meta keyword | |
| property="og:*" | Metadata used by the Open Graph protocol (used by Facebook). Note: currently these are defined as: <meta property="og.*" content="x"/> | FAQ About the Open Graph protocol from Facebook. | Doesn't belong in this registry | Not a value to be used in the name attribute
| |
| resolutions | Authoring web sites to use resolution independent images that display beautifully on high-resolution displays should be made as easy as possible for developers and should not require JavaScript to accomplish.
To accomplish this, I propose a new HTML Meta Tag, So, for example… … means that the developer is telling the browser that she has created 2x resolution images for the images linked to from the current page and named them with a @2x suffix. To illustrate, if her image tag is as follows… … then she has two image files under /images: the low-resolution default (flower.jpg), and a higher-resolution (200%) version named [email protected]. (This is the same naming convention already used by Apple in its Cocoa Touch framework for automatically loading in higher-resolution versions of images.) Based on the meta tag, if the browser detects that the user is running at a Finally, so as not to flood external sites with high-resolution image requests, this functionality would only work for local images specified via relative links. Multiple resolutions The resolutions tag can also contain a list of supported device-pixel ratios so as to support even higher-resolution displays when and if they become available in the future. For example: In this case, the developer would provide 2x, 4x, and 8x versions of all images. So, in the running example, she would make flower.jpg, [email protected], [email protected], and [email protected]. Advantages The advantages of this approach are several:
|
Proposal for native browser support of high-resolution image substitution
How to make your web content look stunning on the iPhone 4’s new Retina display |
Incomplete proposal | Lacks link to a spec |
Failed Proposals
| Keyword | Brief description | Link to more details | Synonyms | Status |
|---|---|---|---|---|
| bot-. . . | Old MetaExtensions revision diff & edit | Unendorsed | ||
| cache | This doesn't actually work; use HTTP headers instead. Value must be "public", "private", or "no-cache". Intended as a simple way to tell user agents whether to store a copy of the document or not. An alternate for HTTP/1.1's cache-control; for publishers without access to modifying cache-control. |
none | Unendorsed | |
| DC. | Dublin Core, maintained by Dublin Core MetaData Initiative (DCMI), is an extensive system with some overlap with non-DC names. This reserves all strings that begin with DC and a dot. Not true; DC-HTML doesn't use hardwired prefixes, but defines the prefixes using link/@rel="scheme.prefix" |
DCMI | Unendorsed | |
| dir-content-pointer | No longer useful. The function is better performed with HTML markup. | Old MetaExtensions revision diff & edit | Unendorsed | |
| no-email-collection | HTML5 prohibits URL-valued meta names. They should be rel keywords instead. Intended to reference legal policy of web site indicating that harvesting of e-mail addresses on the site is not permitted and in violation of applicable laws such as the CAN-SPAM Act of 2003. |
Project Honey Pot | Unendorsed |