Business Process and Data Transformation Language

To define data transformations and business logic within InterSystems IRIS, developers use the Business Process and Data Transformation Language (BPL). It provides specific elements for mapping data, calling external services, and managing execution context.

BPL handles control flow and conditional branching through specific elements like <branch>, <break>, and <sync>. These elements allow developers to route execution paths, manage loops, and implement error handling mechanisms within business processes.

You can manage execution context state when integrating systems using BPL variables. The language supports context, request, response, callrequest, and callresponse variables to maintain state and handle interactions throughout the business process execution.

The best way to assign property values during a business process execution is by using the BPL <assign> element. This element sets property values directly within the execution context to manipulate data as the workflow progresses.

You need to use the <call> element to invoke external services and the <sync> element to manage asynchronous responses within InterSystems IRIS business processes. These elements control external service interactions and ensure proper execution timing.