If all of the following conditions are met, the resulting target table may not be logically consistent.
Example:
DocumentNumber is a key field. DocList.DOCNUMBER and DocNumberSelection.OPTION are GetList export parameters. DocData.USERNAME is a GetDetail export parameter.
You map DocumentNumber to DocList.DOCNUMBER. (Condition 1)
You select DocNumberSelection.OPTION as an output parameter. (Condition 2, since DocNumberSelection and DocList are different SAP parameter names.)
You select DocData.USERNAME as an output parameter. (Condition 3, since it is a GetDetail export parameter.)
These conditions result in a target table whose column sources are GetList and GetDetail parameters. The logical consistency of the relationship between the columns, however, is not assured.