Building a custom application to implement an activity (deprecated)

 Traditional: 
Build a custom application using the IBM® Business Automation Workflow Web API to implement an activity in a BPD.

If you want to build a custom application to implement an activity within a process, you can use either the IBM Business Automation Workflow Web APIs or REST APIs to enable your custom application to interact with Business Automation Workflow. For example, the Business Automation Workflow Web API provides operations that enable you to pass variables from an Business Automation Workflow BPD to a custom application and then back to the BPD for continued processing.