  Entity resolution (ER) is about identifying and merging records in a database
that represent the same real-world entity. Matching dependencies (MDs) have
been introduced and investigated as declarative rules that specify ER policies.
An ER process induced by MDs over a dirty instance leads to multiple clean
instances, in general. General "answer sets programs" have been proposed to
specify the MD-based cleaning task and its results. In this work, we extend MDs
to "relational MDs", which capture more application semantics, and identify
classes of relational MDs for which the general ASP can be automatically
rewritten into a stratified Datalog program, with the single clean instance as
its standard model.
