Top-level Element: <identifier>

Element	<identifier>
Definition	A unique standard number or code that distinctively identifies a resource.
Attributes	Common: Language-related: lang; xml:lang; script; transliteration Linking: ID; IDREF; altRepGroup Miscellaneous: displayLabel; typeURI Specific: type; invalid
Subelements	None
Examples	EXAMPLES
Mappings	MAPPINGS

Guidelines for Use

<identifier> includes manifestation, expression, and work level identifiers. It is a persistent identifier for the resource. (It is not its electronic location, which is supplied by <location><url>. Repeat the <identifier> element for each applicable identifier recorded, including invalid and canceled identifiers.

Specific Attribute Information

type

Definition

Identifies the type of identifier that is recorded, for example ISBN, ISSN, ISNI.

Application

There is no controlled list of identifier types. Suggested values include, but are not limited to, those specified in Standard Identifier Source Codes.

invalid

Definition

Signifies a canceled or invalid identifier.

Application

The invalid attribute should be used with the following value:

yes – This value is used only when recording a canceled or invalid identifier. If invalid attribute is supplied, its value must be "yes". If it is not present, the identifier is assumed to be valid.

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EXAMPLES

<identifier type="music publisher">N.M. 275 Nova Music</identifier>

<identifier type="lccn">##2001336783</identifier>

<identifier type="doi">doi:10.1006/jmbi.1995.0238</identifier>

<identifier type="hdl">hdl:loc.pnp/cph.3c30104</identifier>

<identifier type="uri">http://hdl.loc.gov/loc.law/llst.072</identifier>

<identifier type="isbn" invalid="yes">0877780116</identifier>

<identifier typeURI="http://id.loc.gov/vocabulary/identifiers/isbn">3110145359
</identifier>

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MAPPINGS

MARC Mapping (Bibliographic)

See MARC Mapping to MODS for the <identifier> element.

Dublin Core Mapping

See MODS to Dublin Core Metadata Element Set Mapping.

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Last Updated: October 14, 2022