Object-Orientation FAQ

ConceptBase - A Deductive Object Manager for Meta Data Bases

ConceptBase is a multi-user deductive object manager mainly
intended for conceptual modeling and the coordination of design
environments. The system implements a dialect of Telos which
amalgamates properties of deductive and object-oriented languages. 
Key features are 
   hybrid representation with frame-like objects,
   semantic nets and logical specifications 
   unlimited extensibility by metaclass
   hierarchies (useful for IRDS, schema evolution etc.) 
   deductive rules & integrity constraints 
   queries as classes with membership constraints 
   persistent object management with the ability to interrogate
   past states of the database 
ConceptBase follows a client-server architecture. Client programs
can connect to the ConceptBase server and exchange data via
interprocess communication. The X11-based ConceptBase user
interface offers a palette of graphical, tabular and textual tools
for editing and browsing the object base. The ConceptBase
programming interface allows the users to create their own
client programs in C or Prolog. 
The system can be obtained for free from ftp.informatik.rwth-aachen.de in
      /pub/CB/CB_3.2.4 (released 26-Apr-1994 for Sun/SPARC, SunOS 4.1.3)
      /pub/CB/CB_3.3 (released 26-Apr-1994 for Sun/SPARC, Solaris 2.3)
Both versions are functionally equivalent. They only differ in the
operating system platform.Please read file /pub/CB/doc/InstallationGuide
(resp. /pub/CB/doc/InstallationGuide_3.2.4) before downloading the software.
For running the ftp version you must ask for a key by email.
Contact
ConceptBase-Team
RWTH Aachen - Informatik V
D-52056 Aachen - Germany
Tel./Fax: +49-241 80 21 501 / +49-241-8888321
email: CB@picasso.informatik.rwth-aachen.de
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