This paper points out relevant issues of object inheritance in the context of SCORM/CORDRA research communities. We propose a mechanism, as well as an implemented prototype system, that can be used to support searching and reusing of learning objects formed by a reusability tree in repositories. The underlying repository to store learning objects is constructed based on the architecture defined as CORDRA. We integrate the authoring tool, the LMS, and the repository as a total solution to SCORM-based distance learning. The proposed MINE Registry served as an instance of CORDRA-based repository is also discussed.