For each type of channel (except local channels), BusinessEvents uses a serializer to convert events to messages and a deserializer to convert incoming messages to events. Local channels do not require serializers.
When you configure a destination, you select the appropriate serializer. (It actually includes the serializer and deserializer). For JMS and Rendezvous messages, different serializers are available for different needs. For details see
Selecting a JMS Serializer and
Working with Rendezvous Channels.
See TIBCO BusinessEvents Administration for all deploy-time configuration topics.