The ADL 3D Repository (3DR) is sharing information about 3D models and how they are used with the Learning Registry. The Advanced Distributed Learning Initiative recognized the increasing use of 3D content in education and training products such as simulations, games, and virtual worlds in the U.S. Department of Defense. To facilitate the reuse and sharing of 3D content, a research project was initiated to provide an open source 3D repository to make uploading, finding, and downloading 3D models easy.

A demonstration instance of the 3D Repository is running at Metadata for each of the models in this repository have been shared with the Learning Registry. Paradata about how models are viewed, downloaded, rated, and published is also being shared.The ability to share metadata and paradata through the Learning Registry will remain a key feature of the 3D Repository, as the software becomes widely shared and adopted in other locations.