pbcoreRelationIdentifier contains the identifier of the related asset. In the case that the related asset has a PBCore record, this identifier should correspond with the pbcoreIdentifier of the related asset. However, it is possible to use this element with a record that isn’t in PBCore, in which case the source attribute should identify the source of the identifier.

pbcoreRelationIdentifier can only be contained by pbcoreRelation.

Usage: required within relationType, not repeatable.


  • sourcerequired only for the elements pbcoreIdentifier and instantiationIdentifier; for all other elements, optional. Attribute source provides the name of the authority used to declare the value of the element. Different elements will use the source attribute slightly differently. For example, identifier source (required) should be the name of the organization, institution, system or namespace that the identifier came from, such as “PBS NOLA Code” or an institutional database identifier. For other elements, this might be the name of a controlled vocabulary, namespace or authority list, such as Library of Congress Subject Headings. We recommend a consistent and human readable use.
  • refoptional. Use attribute ref to supply a source’s URI for the value of the element. Attribute ref can be used to point to a term in a controlled vocabulary, or a URI associated with a source.
  • versionoptional. Attribute version identifies any version information about the authority or convention used to express data of this element.
  • annotationoptional. Attribute annotation includes narrative information intended to clarify the nature of data used in the element. Can be used as a notes field to include any additional information about the element or associated attributes.


pbcoreRelationIdentifier contains no subelements.


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