An IDoc mapplet includes a primary key (GPK) and a foreign key (GFK) in each segment. When you configure a mapping, integration template, or

mapping

task, map the primary key field, foreign key field, and any control record fields.

The Prepare transformation in the SAP IDoc Writer mapplet can have primary key and foreign key fields and other input fields, including control record fields.

The Prepare transformation has the following output fields:

IDoc Data. Map this field to an IDoc target.
Error IDoc Data. Map this field to see error messages about IDoc syntax/data conversion.

When you import IDoc metadata, you can add fields to an

IDoc Prepare

transformation. In

Mapplet - SAP IDoc

, on the

Control Record

tab, you can add the control record keys as key-value pairs. For example, you can add the following key-value pairs for the sender partner type and the sender partner number:

Key: SNDPRT and Value: LS for Logical System
Key: SNDPRN and Value ICS

In an inbound mapping, you can pass the sender partner number to SAP. You can pass a value to the CONTROL_SNDPRN port in the control input group of the Prepare transformation. If you do not connect this port to an upstream transformation, the Secure Agent uses the partner number value of SNDPRN key you specify in the

Mapplet - SAP IDoc

asset.