Mappa is a Topic Maps engine. It is compatible with the Topic Maps - Data Model (TMDM) and provides different backends to store topic maps. Further, it provides the import and export of different Topic Maps syntaxes.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.
