The ReqIF Requirements Interchange Format [1] enables the exchange of requirement information by transferring XML documents.

This Recommendation provides an overview of the prostep ivip project activities regarding ReqIF. After a short introduction, the interaction of the user-driven Workflow Forum and the vendor-driven Implementor Forum is explained in more detail. Within the ReqIF Workflow Forum project group, use cases for the application of ReqIF in the context of product engineering were specified. These are presented in this document. For the industrial implementation of the use cases a workflow has been defined. To support the workflow the user community agreed on a set of user-defined attributes and their values. These attributes will become part of a ReqIF data exchange.