Some specifications:
About abstract models for KRLs:
   - a top-level ontology of structures for KRL models
   - particular KRL models
   - some translation rules between some KRL model structures
About concrete models (notations) for KRLs:
   - some primitives for specifying KRL notations and exports
   - particular KRL notations
   - an ontology of grammars (general ontology + grammar for a generic parser of KRLs;
       future specifications of particular grammars will be used for automatically 
       generating grammars based on a KRL specification)
Server to translate from one KRL to another (KRL names or KRL specifications can be given):
 interface without frame