This is an example of a Ladder Diagram from the IEC1131 standard: I find this fascinating! As a computer programmer, it would never have occurred to me to represent logic expressions in this way. But to electrical engineers used to laying out circuits...

RobR > Tools built on the type of meta-technology you talk about are not new. Agreed! Of course, I'm working at Microsoft rather than at a university, so utter novelty is not a claim. In fact, we hope to use the best ideas and experience that have...

RobR > I think for many language definition purposes, UML stereotypes are in fact much more useful than you think.I think for many language definition purposes, UML stereotypes are in fact much more useful than you think. My feeling is that it's not...

RobR writes: re: DSL tools available I'd be interested to know how your tools differ from doing the following: - creating a bunch of stereotypes in a UML tool (possibly with some icons to make it look prettier). So for baggage handling I could build various...

In my previous job, I used to go around showing people some rather neat techniques for doing requirements analysis (and in particular the Catalysis method I created with Desmond D'Souza). One of the big frustrations was that we didn't have any tools to...