Read the Adapter-Specific Identifiers of a Business Service in mapping step

Hi,

Is it possible to get the values specified in "Adapter-Specific Identifiers" of a Business Service / Business System in the Integration Directory, to be used in the mapping step - and how?

My idea was to access the information via a user definded function in a messages-mapping.

I know the IDOC receiver adapter reads the value for "Logical System" when creating the EDI_DC40 record, but this is done in the Call Adaper step after the mapping step and therefore not available in the message SOAP Header (IDocOutbound not created yet I guess).

Can anyone help?

Thanks

Best Regards

Christian