Retrieving Related Parts Information for a Specific CAD Document
This example shows you how to retrieve related parts information for a specific CAD document. Use the following GET request.
URI
GET /Windchill/servlet/odata/v1/CADDocumentMgmt/CADDocuments('OR%3Awt.epm.EPMDocument%3A167183')?$expand=PartDocAssociations($expand=RelatedParts) HTTP/1.1
* 
The navigation does not return the related parts information when:
A CAD document contains model items that are related to a part.
A CAD document has a custom association to a part.
A CAD drawing has a calculated association to a part.
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