This document describes how the Papyrus modeling tool is being adapted to integrate requirements modeling. It discusses how modeling and requirements processes have traditionally been separate. Several approaches like SysML have tried to combine the two. The Papyrus tool is an open source UML modeling environment for Eclipse that is being enhanced with requirements modeling capabilities based on a requirements metamodel. This will allow requirements to be modeled and traced to solution models, helping with validation. The approach is being tested in industrial contexts like automotive and aeronautics.