Another approach to UML diagramming. This time publicised in Martin Fowler’s Blicki: MF Bliki: UmlSketchingTools. UMLGraph uses a mixure of javadoc tags and pic macros to do the hard work. Dr Spinelis argues for his declaritive approch in “On the Declarative Specification of Models, IEEE Software, 20(2):94-96, March/April 2003 which is on-line in PDF format at Worth a look I think — as is the author’s (Domidis Spinellis) book Code Reading.