Designing and using Domain Specific Languages (DSL) is a popular programming style in Ruby community. I am experimenting with Ruby-based DSL for authoring topic maps. Surprisingly, the result is very close to my view on the “ideal” CTM (Compact Topic Maps syntax). ...

I upgraded one of my Mac-based systems with OS X Leopard. It is great. I like it. But from the subject-centric perspective it is still more or less a traditional application/document-centric OS. How can we make it more subject-centric? ...