Feature models are a popular formalism for managing vari-ability in software product lines (SPLs). In practice, devel-oping an SPL can involve modeling a large number of fea-tures representing different viewpoints, sub-systems or con-cerns of the software system. To manage complexity, there is a need to separate, relate and compose several feature mod-els while automating the reasoning on their compositions in order to enable rigorous SPL validation and configura-tion. In this paper, we propose a Domain-Specific Language (DSL) that is dedicated to the management of feature mod-els and that complements existing tool support. Rationale for this language is discussed and its main constructs are presented through examples. We show how the DSL c...