I am trying to configure an instance of a Relational.Composite transformation by following the online guide for this, specifically with the goal of deriving a new DN attribute via a composite key relationship. I was originally trying to find out what the parameter name might be (the equivalent group transformation has a "GroupTarget" parameter) but couldn't find anything (see comment on the link above). However, I since realised that I am probably supposed to be setting the "target" property of the dn element itself ... but now that I am doing this I am getting an erroneous "The column ValueLevel1ID is a pre-existing column in adapter Meta Tuple Value Adapter". I say erroneous because there is no such duplicate declaration.
My suspicion here is that most people have been using the "columnMappings" element with this transformation instead of "dn" and hence this question hasn't come up before - and the example xml appears to include redundant properties InputKey and RelationshipKey, so I am thinking there might be another doco inconsistency here too?
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