An application may need to transmit many different datatypes, too many to create a separate Datatype Channel for each. In this case, multiple datatypes can share a single channel by using a different Selective Consumer (515) for each type. This makes a single physical channel act like multiple logical Datatype Channels (a strategy called multiplexing). Whereas Datatype Channel explains why all messages on a channel must be of the same format, Canonical Data Model (355) explains how all messages on all channels in an enterprise should follow a unified data model.
