what is the primary key between the Agreement Lines table and PO_ATTR_VALUES_INTERFACE

Hi Team,

Could you help me with , what is the primary key between the Agreement Lines table and PO_ATTR_VALUES_INTERFACE

We have a custom screen for Requisitions and Client is expecting to see the BPA Line Level Images in the Catalog Search of the Custom Screen.

This will help us to prepare a BIP Report to show the Picture and Thumbnail Image

Also, is there any REST API Available to get the Image for the BPA Lines