A Database System for Metamodeling and Method Engineering

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Description is a multi-user deductive and object-oriented database system for metamodeling and method engineering. Includes a graphical client that builds upon the logic-based features of the server. The data model is O-Telos. can represent information at the data level (example data, traces of process executions etc.), the class level (schemas, process definitions etc.), the metaclass level (constructs of modeling languages), the meta-metaclass level (constructs for defining modeling languages), and so forth. is developed by the ConceptBase Team at University of Skövde (HIS) and University of Aachen (RWTH). supports Linux, Mac OS X and Windows. is free software distributed under a FreeBSD-style license. Web Site


  • supports multiple users and shared workspaces (modules)
  • includes an engine for Datalog with negation
  • includes an active rule component (ECA)
  • based on the Telos knowledge representation language
  • supports metamodeling with an unlimited number of abstraction levels
  • provides instantiation/classification, specialization, and attribution
  • allows to define the semantics of new link types such as partOf
  • allows to manipulate large conceptual models (>1.000.000 concepts)
  • has a graphical user interface implemented in Java
  • is free software


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Additional Project Details



Intended Audience

Science/Research, Education, Developers, Architects

User Interface

Java Swing, Command-line

Programming Language

Prolog, C++, C, Java


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