Does the second sentence mean that all that $4m's work was too premature, obscure, useless or ano.? I don't think xml is much use, nor xslt. I'd like to know what Nad makes of your answer. I had a go at classifying the universe in comprehensive language with the late 90s-early noughties Java ontology fad; the laws of Codd are still the only micro-epistemology (DSL) I've found I've needed in practice.