Stéphane Crozat, an engineer and PhD in computer sciences, is a professor at the Université de Technologie de Compiègne since 2002. He is the technological coordinator of the "Contents and Knowledge Engineering" unit of the university. He teaches databases, data warehouses and document engineering at the computer sciences department. He is co-inventor in 1999 of the publishing chains environment Scenari and one of the animators of Scenari's user community. In 2007, he published "Scenari, la chaîne éditoriale libre", first general public book on publishing chains.Profesional edition of Scenari is today realized by Kelis company. Specialized in digital document engineering, he links theoretical research, real uses and software design.