"Ensuring data consistency is the core of our work." A discussion of descriptive challenges in source code • Can descriptive metadata be extended to software? Certainly. Morane Gruenpeter (Software Heritage, Inria), Alain Monteil, Jozéfina Sadowska and Estelle Nivault (Scientific and Technical information Service, Inria) analyze the metadata challenges. Insights from a developer and three documentalists.