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 href="http://www.informatik.rwth-aachen.de/I5/CBdoc/cbflyer.html"
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