DCMI Dublin Core Metadata Initiative



The Dublin Core Metadata Initiative (DCMI) is an open forum engaged in the development of interoperable online metadata standards that support a broad range of purposes and business models. DCMI's activities include consensus driven working groups, global workshops, conferences, standards liaison, and educational efforts to promote widespread acceptance of metadata standards and practices.

DC Dublin Core META Tags

Examples of the DCMI Metadata Element Set complete with HTML Comments, can be seen by viewing the source code of this page. You can also view a plain text file of the DCMI Metadata example without the HTML Comments Tags.

Admin Note: As of this date 2009-01-01, the Dublin Core META Tags do not appear to be supported by the major public search engines. We suggest that you review the Dublin Core Projects for more information on who is promoting and supporting the DCMI standards prior to any implementation of the Dublin Core Metadata Element Set.

Below is a listing of the Dublin Core Metadata Element Set (15) as of 2009-01-01.

Element Name: Title
Label: Title
Definition: A name given to the resource.
Comment: Typically, Title will be a name by which the resource is formally known.
<meta name="DC.title" lang="en" content="DC Dublin Core META Tags - DCMI Dublin Core Metadata Initiative">

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Element Name: Creator
Label: Creator
Definition: An entity primarily responsible for making the content of the resource.
Comment: Examples of Creator include a person, an organization, or a service. Typically, the name of a Creator should be used to indicate the entity.
<meta name="DC.creator" content="Administrator">

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Element Name: Subject
Label: Subject and Keywords
Definition: A topic of the content of the resource.
Comment: Typically, Subject will be expressed as keywords, key phrases or classification codes that describe a topic of the resource. Recommended best practice is to select a value from a controlled vocabulary or formal classification scheme.
<meta name="DC.subject" lang="en" content="DCMI; Dublin Core Metadata Initiative; DC META Tags">

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Element Name: Description
Label: Description
Definition: An account of the content of the resource.
Comment: Examples of Description include, but is not limited to: an abstract, table of contents, reference to a graphical representation of content or a free-text account of the content.
<meta name="DC.description" lang="en" content="Examples of Dublin Core META Tags.">

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Element Name: Publisher
Label: Publisher
Definition: An entity responsible for making the resource available
Comment: Examples of Publisher include a person, an organization, or a service. Typically, the name of a Publisher should be used to indicate the entity.
<meta name="DC.publisher" content="SEO Consultants Directory">

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Element Name: Contributor
Label: Contributor
Definition: An entity responsible for making contributions to the content of the resource.
Comment: Examples of Contributor include a person, an organization, or a service. Typically, the name of a Contributor should be used to indicate the entity.
<meta name="DC.contributor" content="DCMI Dublin Core Metadata Initiative">

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Element Name: Date
Label: Date
Definition: A date of an event in the lifecycle of the resource.
Comment: Typically, Date will be associated with the creation or availability of the resource. Recommended best practice for encoding the date value is defined in a profile of ISO 8601 [W3CDTF] and includes (among others) dates of the form YYYY-MM-DD.
<meta name="DC.date" scheme="W3CDTF" content="2004-01-01">

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Element Name: Type
Label: Resource Type
Definition: The nature or genre of the content of the resource.
Comment: Type includes terms describing general categories, functions, genres, or aggregation levels for content. Recommended best practice is to select a value from a controlled vocabulary (for example, the DCMI Type Vocabulary [DCT1]). To describe the physical or digital manifestation of the resource, use the FORMAT element.
<meta name="DC.type" scheme="DCMIType" content="Text">

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Element Name: Format
Label: Format
Definition: The physical or digital manifestation of the resource.
Comment: Typically, Format may include the media-type or dimensions of the resource. Format may be used to identify the software, hardware, or other equipment needed to display or operate the resource. Examples of dimensions include size and duration. Recommended best practice is to select a value from a controlled vocabulary (for example, the list of Internet Media Types [MIME] defining computer media formats).
<meta name="DC.format" scheme="IMT" content="text/html">

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Element Name: Identifier
Label: Resource Identifier
Definition: An unambiguous reference to the resource within a given context.
Comment: Recommended best practice is to identify the resource by means of a string or number conforming to a formal identification system. Formal identification systems include but are not limited to the Uniform Resource Identifier (URI) (including the Uniform Resource Locator (URL)), the Digital Object Identifier (DOI) and the International Standard Book Number (ISBN).
<meta name="DC.identifier" content="/meta-tags/dublin/">

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Element Name: Source
Label: Source
Definition: A Reference to a resource from which the present resource is derived.
Comment: The present resource may be derived from the Source resource in whole or in part. Recommended best practice is to identify the referenced resource by means of a string or number conforming to a formal identification system.
<meta name="DC.source" content="/meta-tags/">

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Element Name: Language
Label: Language
Definition: A language of the intellectual content of the resource.
Comment: Recommended best practice is to use RFC 3066 [RFC3066] which, in conjunction with ISO639 [ISO639]), defines two and three letter primary language tags with optional subtags. Examples include "en" or "eng" for English, "akk" for Akkadian", and "en-GB" for English used in the United Kingdom.
<meta name="DC.language" scheme="RFC1766" content="en">

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Element Name: Relation
Label: Relation
Definition: A reference to a related resource.
Comment: Recommended best practice is to identify the referenced resource by means of a string or number conforming to a formal identification system.
<meta name="DC.relation" content="/meta-tags/">

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Element Name: Coverage
Label: Coverage
Definition: The extent or scope of the content of the resource.
Comment: Typically, Coverage will include spatial location (a place name or geographic coordinates), temporal period (a period label, date, or date range) or jurisdiction (such as a named administrative entity). Recommended best practice is to select a value from a controlled vocabulary (for example, the Thesaurus of Geographic Names [TGN]) and to use, where appropriate, named places or time periods in preference to numeric identifiers such as sets of coordinates or date ranges.
<meta name="DC.coverage" content="World">

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Element Name: Rights
Label: Rights Management
Definition: Information about rights held in and over the resource.
Comment: Typically, Rights will contain a rights management statement for the resource, or reference a service providing such information. Rights information often encompasses Intellectual Property Rights (IPR), Copyright, and various Property Rights. If the Rights element is absent, no assumptions may be made about any rights held in or over the resource.
<meta name="DC.rights" content="/legal/terms-of-use.htm">

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Dublin Core Metadata Initiative References

  1. Dublin Core Metadata Element Set
    The Dublin Core metadata element set is a standard for cross domain information resource description. Here an information resource is defined to be anything that has identity. This is the definition used in Internet RFC 2396, Uniform Resource Identifiers (URI): Generic Syntax, by Tim Berners-Lee et al. There are no fundamental restrictions to the types of resources to which Dublin Core metadata can be assigned.
  2. DCMI Metadata Terms
    Admin Note: If you are using the Dublin Core metadata element set, be sure to verify your DCMI Terms are correct. This document is an up to date, authoritative specification of all metadata terms maintained by the Dublin Core Metadata Initiative - elements, element refinements, encoding schemes, and vocabulary terms (the DCMI Type Vocabulary).
  3. Dublin Core Metadata Editor
    This service will retrieve a Web page and automatically generate Dublin Core metadata, either as HTML <meta> tags or as RDF/XML, suitable for embedding in the <head>...</head> section of the page. The generated metadata can be edited using the form provided and converted to various other formats (USMARC, SOIF, IAFA/ROADS, TEI headers, GILS, IMS or RDF) if required. Optional, context sensitive, help is available while editing.
  4. Dublin Core Assistant
    DC-assist is a small, flexible help utility for metadata applications and is intended to complement the help pages embedded within existing software. Start DC-assist up once at the beginning of your session for quick and easy access to a set of help pages.
  5. Metadata Resources from UKOLN
    This is a must have list of metadata resources for anyone wanting to further develop their knowledge of metadata and related information.
  6. Translations of DCMI Documents
    Members of the DCMI Community have taken the time to translate DCMI documents. A list of these translations is maintained on this page.
  7. Dublin Core Projects
    Whose using the Dublin Core Metadata standards? Check out this A-Z list of whose who in support of the DCMI. The Dublin Core Projects Subject Area List includes; Arts and Humanities, Bibliography, Business, Education, Environment, Mathematics, Medicine, Other, Science and Technology.

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Where did the name Dublin Core originate?

The original workshop for the Initiative was held in Dublin, Ohio in 1995. Hence the term "Dublin Core" in the name of the Initiative. Since that time there have been a total of nine Dublin Core workshops held in England, Australia, Finland, Germany, Canada, Japan and the United States.

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