The attached document ID that is used by the Attachments framework.
Identifier to Attachment Revisions
This is the hash key of the attributes which make up the composite key--- PcsAttachmentId, LnpRecordKey and TaskId ---for the Workflow Attachments resource and used to uniquely identify an instance of Workflow Attachments. The client should not generate the hash key value. Instead, the client should query on the Workflow Attachments collection resource with a filter on the primary key values in order to navigate to a specific instance of Workflow Attachments.
For example: publicSectorPcsAttachments?q=PcsAttachmentId=<value1>;LnpRecordKey=<value2>;TaskId=<value3>
No content. This task does not return elements in the response body.