There are a few papers written by mathematicians, they are rather far from the hot DB problems. There are several papers written by DB theorists, CT is used there as a kind of decoration rather than essentially. There are a few works where CT is really employed for solving real DB problems. In summer of 1994 Boris Kadish and I wrote a declarative text called "Algberaic Graph-Oriented = Category-Theory-Based: Manifesto of categorizing database theory " (its last updated version can be found on ftp: //ftp.cs.chalmers.se/pub/users/diskin/mnfst4.* ), in which there is a list of about 30 titles on CT & DB. The manifesto and other our papers on CT & DB are oriented mainly on DB people but can be of some interest for CT people as well. The machinery we use is a generalization of Makkai's sketches. My last effort in the direction "CT for DB" is the paper "Variable set semantics for generalized sketches: Why ER is more object-oriented than OO" (on ftp: //ftp.cs.chalmers.se/pub/users/diskin/ERvsOO.* ) submitted to 'Data & Knowledge Engineering'. Zinovy Diskin