1. Identifier (M)

The Identifier is a unique string that identifies a resource (occurrences: 1).

Allowed values, examples, other constraints

Format should be “10.1234/foo”

1.1 identifierType (M)

The type of the Identifier (occurrences: 1).

Allowed values, examples, other constraints

Controlled list values (DataCite)

  • DOI

Controlled list values (OpenAIRE)

  • ARK

  • DOI

  • Handle

  • PURL

  • URN

  • URL

Note

Unlike DataCite, OpenAIRE allows for DOIs and other types of identifiers.

Example

1<identifier identifierType="DOI">
2 10.1594/WDCC/CCSRNIES_SRES_B2
3</identifier>