A framework for a modular multi-concept lexicographic closure semantics
  We define a modular multi-concept extension of the lexicographic closure
semantics for defeasible description logics with typicality. The idea is that
of distributing the defeasible properties of concepts into different modules,
according to their subject, and of defining a notion of preference for each
module based on the lexicographic closure semantics. The preferential semantics
of the knowledge base can then be defined as a combination of the preferences
of the single modules. The range of possibilities, from fine grained to coarse
grained modules, provides a spectrum of alternative semantics.
