IdentifiersXML

The IdentifiersXML parameter specifies identifiers for documents to be collected, held, released or deleted. This parameter can be specified instead of the Identifiers parameter.

The IdentifiersXML parameter also specifies custom metadata to associate with each returned document. For example:

<identifiersXML>
   <identifier value="PGlkIHM9Ik1ZVEFTSyIgcj0iTDovRGVt...">
      <metadata name="my_field" value="my_value..."/>
   </identifier>
</identifiersXML>