Decide how you want to use your existing resources with WebSphere Business Integration Message Broker Version
6.0. Except for user-defined extensions, you do not need to perform any
tasks to migrate your development and deployment resources, such as message
flow files, message set definition files, ESQL files, mapping
files, XML Schema files, and broker archive files. You can just start
using these resources with WebSphere
Business Integration Message Broker Version 6.0.
After you start using your resources in Message
Brokers Toolkit Version 6.0, there are restrictions to using these
same resources again with Message
Brokers Toolkit Version 5.0 or Version 5.1.
For more information, see Conditions for using migrated resources with previous versions of the Message Brokers Toolkit