ALGEBRAIC ASPECTS OF ATTRIBUTE DEPENDENCIES IN INFORMATION SYSTEMS
Ivo Düntsch, Günther Gediga · Fundamenta Informaticae · 1997
We exhibit some new connections between structure of an information system and its corresponding semilattice of equivalence relations. In particular, we investigate dependency properties and introduce a partial ordering of information systems over a fixed object set U which reflects the sub-semilattice relation on the set of all equivalence relations on U.