Stacking Maps in BizTalk Server

Scenario: I have a need to process two transformations back-to-back.  For example, I have Schema1, Schema2, and Schema3, and I have two maps: Schema1 -> Schema2 Schema2 -> Schema3 Schema1 is our canonical schema, meaning this is the schema we always use to "publish" to the MessageBox database.  Consider this diagram in which we receive…

9