document-id

Related Object Document Identifier

Identifier of a document within a publication that is (or contains) the target of the <related-object> element.

Remarks

External Identifier: This attribute holds an external identifier assigned to a publication that is part of the description of a related object (<related-object>).

Used on Element: <related-object>

ValueMeaning
Text, numbers, or special charactersAn identifier for the document that contains the related object (<related-object>).
RestrictionThis is an optional attribute; there is no default.