Interoperability of KB Systems
(R.Valt)

My research work (project "Knowledge Based Systems", nr. 070100) in the year 1996 has been done mainly in two areas:

• visual specification environments;
• programming language interoperability issues.

As a result the following extensions and changes were made to the NUT system:

• Possibility to visually specify class inheritance in the NUT scheme editor window.
• Improved NUT considering solving reflective programming tasks. Removed length limitation of NUT text object allowing to modify arbitrary long program texts. Also problems related to proper updates of modified programs in NUT class and scheme editor windows were solved.
• Mechanism for extending dynamically NUT virtual machine with external programs written in native code was added to the NUT programming environment. The following existing C-libraries were ported to NUT DLL-s (dynamically loadable libraries):
  • library with random number generating functions;
  • library for generating graph layouts;
  • library for simulating discrete events;
  • NUT-Matlab interface library;
  • NUT-Tcl/Tk interface library.