MaRK’11 focuses on potentials and benefits of light-weight knowledge management approaches, such as ontologies, semantic Wikis, recommender systems, and rationale management techniques - applied to requirements engineering. The workshop discusses emerging ideas, methodologies, frameworks, tools, as well as industrial experiences for capturing, representing, sharing, and reusing tacit knowledge in requirements engineering. Furthermore, the workshop provides an interactive exchange platform between the knowledge management communities, requirements engineering community, and industrial practitioners.