The Dublin Core™ Element Set Version 1.1
Dublin Core™ Metadata Element Set, Version 1.1: Reference Description
Is Superseded By:
Status of document:
This is a DCMI Recommendation.
|Description of document:||This document is the reference description, version 1.1 of the Dublin Core™ Metadata Element Set. This document supersedes the Dublin Core™ Metadata Element Set, version 1.0. See the Dublin Core™ Home Page (http://dublincore.org) for further information about the workshops, reports, working group papers, projects, and new developments concerning the Dublin Core™ Metadata Element set.|
The document summarizes the updated definitions for the Dublin Core™ metadata elements as originally defined in [RFC2413]. These new definitions will be officially known as Version 1.1.
The definitions utilise a formal standard for the description of metadata elements. This formalisation helps to improve consistency with other metadata communities and enhances the clarity, scope, and internal consistency of the Dublin Core™ metadata element definitions.
Each Dublin Core™ element is defined using a set of ten attributes from the ISO/IEC 11179 [ISO11179] standard for the description of data elements. These include:
- Name - The label assigned to the data element
- Identifier - The unique identifier assigned to the data element
- Version - The version of the data element
- Registration Authority - The entity authorised to register the data element
- Language - The language in which the data element is specified
- Definition - A statement that clearly represents the concept and essential nature of the data element
- Obligation - Indicates if the data element is required to always or sometimes be present (contain a value)
- Datatype - Indicates the type of data that can be represented in the value of the data element
- Maximum Occurrence - Indicates any limit to the repeatability of the data element
- Comment - A remark concerning the application of the data element
Fortunately, six of the above ten attributes are common to all the Dublin Core™ elements. These are, with their respective values:
Version: 1.1 Registration Authority: Dublin Core™ Metadata Initiative Language: en Obligation: Optional Datatype: Character String Maximum Occurrence: Unlimited
The above attributes will not be repeated in the below definitions, however, they do represent part of the formal element definitions.
The definitions provided here include both the conceptual and representational form of the Dublin Core™ elements. The Definition attribute captures the semantic concept and the Datatype and Comment attributes capture the data representation.
Each Dublin Core™ definition refers to the resource being described. A resource is defined in [RFC2396] as "anything that has identity". For the purposes of Dublin Core™ metadata, a resource will typically be an information or service resource, but may be applied more broadly.
Name: Title Identifier: Title Definition: A name given to the resource. Comment: Typically, a Title will be a name by which the resource is formally known.
Name: Creator Identifier: Creator Definition: An entity primarily responsible for making the content of the resource. Comment: Examples of a Creator include a person, an organisation, or a service. Typically, the name of a Creator should be used to indicate the entity.
Name: Subject and Keywords Identifier: Subject Definition: The topic of the content of the resource. Comment: Typically, a 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.
Name: Description Identifier: Description Definition: An account of the content of the resource. Comment: Description may 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.
Name: Publisher Identifier: Publisher Definition: An entity responsible for making the resource available Comment: Examples of a Publisher include a person, an organisation, or a service. Typically, the name of a Publisher should be used to indicate the entity.
Name: Contributor Identifier: Contributor Definition: An entity responsible for making contributions to the content of the resource. Comment: Examples of a Contributor include a person, an organisation, or a service. Typically, the name of a Contributor should be used to indicate the entity.
Name: Date Identifier: Date Definition: A date associated with an event in the life cycle 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 follows the YYYY-MM-DD format.
Name: Resource Type Identifier: 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 working draft list of Dublin Core™ Types [DCT1]). To describe the physical or digital manifestation of the resource, use the FORMAT element.
Name: Format Identifier: 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 determine 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).
Name: Resource Identifier Identifier: 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. Example formal identification systems include the Uniform Resource Identifier (URI) (including the Uniform Resource Locator (URL)), the Digital Object Identifier (DOI) and the International Standard Book Number (ISBN).
Name: Source Identifier: 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 reference the resource by means of a string or number conforming to a formal identification system.
Name: Language Identifier: Language Definition: A language of the intellectual content of the resource. Comment: Recommended best practice for the values of the Language element is defined by RFC 1766 [RFC1766] which includes a two-letter Language Code (taken from the ISO 639 standard [ISO639]), followed optionally, by a two-letter Country Code (taken from the ISO 3166 standard [ISO3166]). For example, 'en' for English, 'fr' for French, or 'en-uk' for English used in the United Kingdom.
Name: Relation Identifier: Relation Definition: A reference to a related resource. Comment: Recommended best practice is to reference the resource by means of a string or number conforming to a formal identification system.
Name: Coverage Identifier: Coverage Definition: The extent or scope of the content of the resource. Comment: Coverage will typically 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 that, where appropriate, named places or time periods be used in preference to numeric identifiers such as sets of coordinates or date ranges.
Name: Rights Management Identifier: Rights Definition: Information about rights held in and over the resource. Comment: Typically, a Rights element 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 can be made about the status of these and other rights with respect to the resource.
[DCT1] Type Vocabulary.
[ISO11179] ISO 11179 - Specification and Standardization of Data Elements, Parts 1-6.
[ISO639] ISO 639 - Codes for the representation of names of languages.
[ISO3166] ISO 3166 - Codes for the representation of names of countries.
[MIME] Internet Media Types.
[RFC1766] Tags for the Identification of Languages, Internet RFC 1766.
[RFC2396] Uniform Resource Identifiers (URI): Generic Syntax, Internet RFC 2396.
[RFC2413] Dublin Core™ Metadata for Resource Discovery. Internet RFC 2413.
[TGN] Getty Thesaurus of Geographic Names.
[W3CDTF] Date and Time Formats, W3C Note.