I'm not clear why you feel it's an appropriate candidate for inclusion in Boost.
On reflection it comes down to the question of what Boost is. Do domain specific libraries of all sorts have a home here (for which I guess examples would include the BGL), or is Boost more about a general programming toolkit (for example Boost.Bind). I don't know the answer to that, not do I feel qualified to make any judgement.
I've actually been thinking about this question (in general, not specifically for Castor) for a couple of months. There appear to be some natural partitions in the kinds of Boost libraries: system abstractions, general programming, programming paradigm, data structures & algorithms, scientific computing, DSELs, etc. It's not always obvious that these categories exist because Boost is so large, or which libraries fall into which categories. I think Castor definitely falls into the paradigm category, probably also in DS&A too -- especially if you make unification a top-level algorithm. An association with Boost, if not submission, would be a good thing. At least, that's what I think :) Andrew Sutton andrew.n.sutton@gmail.com