How to set a new field in SAP Ariba Api

[jarenass01]

Hi experts,

I'm using the Api "Contract Workspace Retrieval API" of Ariba, but i need to get a new field that show in the Ariba front end, but i does not appear in the refered API.

In fact, how i get the name of the field that i need?

How can I set this field in the API.

Thanks in advance.