Unified Modeling Language ...
[Could someone discuss what UML is useful for? How about some examples that are relevant relating to the building of tcl based code?]
RS: For Tcl not really, because UML is used in OO Analysis and Design, so results in generating C++/Java code with class definitions, attributes and methods. Incr Tcl maybe...
"Playing UML" gives routines for drawing movable UML graphs (use case and class diagrams so far, more maybe to come) on a canvas.
A variety of UML related tool pointers may be found at Applications in Tcl and Tcl/Tk.
Ideogramic specializes in UML-targeted Gesture Recognition.
Also, see Invoking Tcl commands from Cplusplus for some info on the Voodoo UML class diagram editor.
Ideogramic is a Tcl-based company that specializes in UML and related metadata.
Sven Sass's employer scripts ObjectiF's public interface with Tcl, for internal use.