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In page James Matisoff:

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In 1987, Matisoff began the Sino-Tibetan Etymological Dictionary and Thesaurus (STEDT) project, an historical linguistics project aimed at producing an etymological dictionary of Sino-Tibetan organized by semantic field. The project maintains a large, publicly accessible lexical database of nearly one million records with data on Sino-Tibetan languages from over 500 sources. This database is used to identify and mark cognates for the purposes of better understanding the historical development of the Sino-Tibetan language family and the subgroupings of the languages therein, and to reconstruct the theoretical proto-language of the language family, Proto-Sino-Tibetan.[3]