A method of managing software design specifications with functional rule versioning may include storing references to a plurality of software components in a database system, and storing references to a plurality of functional rules in the database system. In some embodiments, the functional rules may define behaviors that may be assigned to the plurality of software components. The method may also include receiving a selection of one or more software components from the plurality of software components. The one or more software components may define a software product. The method may additionally include receiving assignments of the plurality of functional rules to the one or more software components, and providing an interface for navigating through the one or more software components and editing the assignments.