Frame-Based Code G e n e ration of Mu l ti-Dimensi on a l Feature Sets o r Origami meets Frames

Software product lines are defined in terms of feature sets that can be orthogonally arranged, according to different design criteria, to constitute dimensions in a design space. When feature sets are well-structured, it is pos- sible to use Origami, a feature-oriented programming technique, to guide feature modelling and composition. However, a considerable manual effort still remains to maintain the consistency of multi-dimensional feature sets, as feature implementations are parametrically interdependent. In this paper, we present a code-generation technique that integrates frame technology and Origami to address this problem. Our motivating example is the expression problem, viewed as an instance of a two-dimensional feature set.