ConceptBase.cc

Traceability is about following dependencies between work products (”deliverables”). So, a deliverable are both input and output to activities of a workflow. If an activity retrieves some deliverable as input and produces another activity as output ... [More] , then the output deliverable directly depends on the input deliverable. This direct dependency can made “transitive” to cover also [...] [Less]

ConceptBase stores objects in a binary database format. You can inspect the content in a user-friendly “frame” format but that requires you to use the Telos editor of the ConceptBase user interface. Many users prefer to define objects, classes and ... [More] meta-classes in an offline mode. The Telos sources are then in regular text files (extension *,sml [...] [Less]

Numbers are pretty essential in computing. When combined with logic, there is however a catch: any logic that involves integer arithmetic is undecidable. So, if we include numbers into DATALOG (the logic used in ConceptBase), then we loose the guaranteed termination of DATALOG  rule evaluation. Strictly speaking, numbers as such are not [...]

ConceptBase builds fundamentally on deductive rules (Datalog). Deductive rules derive facts from the database using a rock-solid engine. The price of the stability of this engine is the limited expressiveness of deductive rules. For example, one ... [More] cannot create new objects with deductive rules. Active rules in ConceptBase are complementing the capabilities of deductive rules. Like deductive [...] [Less]

Graphviz is a wonderful program for automatically  computing a good layout for all all kinds of graphs, including large graphs. With ConceptBase, you can produce excerpts of the database in the input format of Graphviz. As ConceptBase is designed for ... [More] defining new (graphical) modeling languages as meta models, you can add the conversion scripts for [...] [Less]

The textbook ‘Metamodeling for Method Engineering‘ is accompanied by a CD-ROM with many metamodeling examples, including those discussed in the textbook. A second source for (meta)modeling examples is the free web site CB-Forum. For example, there ... [More] are dozens of examples on how to use active rules, e.g. to maintain materialized views or to trigger emails upon [...] [Less]

A new monthly release of ConceptBase is now available for download via http://conceptbase.cc. The active rule components has now some interesting new capabilities to structure the sequence in which triggers are executed. Sources as well as binaries are released this time.

I just released the binaries of ConceptBase.cc V7.3-20110404. The only significant change is the introduction of the tBegin/tEnd actions for ECA rules. They enforce a certain transactional behavior for ECA rules. This feature shall be extended towards supporting multiple event streams. Sources for this build are not (yet) released.

This intermediate release consolidates the import/export functionality and features a new function to call a post-export command file, e.g. to convert extracted sources by a compiler. Some new builtin functions for string manipulation have been added ... [More] as well. An old bug with initializing the core database objects with system objects is now corrected. [Less]

The new release includes the import/export functionality announced in the previous positing. Binaries for all supported platforms are included. The user manual (doc/UserManual) has been slighlty re-organized.