ADL files contain broker metadata typically created using broker_save command but also can be done from either the old WmBrokerAdmin or the new MwS Broker Administration portlets.
ADLs can also contain Broker-based application business logic created using the old Active Software development tools (Enterprise Integrator, Manager, Monitor, Doc Tracker, etc.
Other than the fact that Integration Server can communicate with Broker and that you can create document types from Broker documents (aka Events), the “application” contained in your ADL likely has nothing whatsoever to do with Integration Server.
You can certainly migrate the documents, client groups and other meta-data to Broker 6.x and use those definitions to build new IS integrations.
You may also get some benefit from exploring the migration tools described in the Pre-6.0 Enterprise to webMethods 6 Upgrade Guide document on Advantage.
Mark
#Integration-Server-and-ESB#webMethods-General#webMethods-Upgrade#webMethods