Aggregating messages is a fairly common task in BizTalk.
By "aggregating" I mean taking two separate
messages with repeating elements and combining them into a new message which
contains the elements of both messages - the same as doing a Union in SQL.
However, what if you want to remove duplicates?
It's not as easy as it seems, and in truth the only way I
have found to do this is via custom XSLT.
Combining two messages
This is actually fairly easy: you use...