2009-09-28: TNTBase has switched to a newer version of Berkeley DB XML

[vzholudev]

TNTBase now is based on a newer version of DB XML, namely 2.5. The switch has three main benefits: 1) Now Result Sets in DB XML can be copied and used outside of a transaction scope. That means that now one doesn't have to convert results into strings or streams, but can use the in-memory XML representation. 2) DB XML supports automated indexing, that is if XML files have the similar structure, the necessary indices will be added automatically upon commit. 3) Now there is a possibility to use Java (as well as C++ or Python) functions inside XQuery. That gives us the possibility to e.g. query an RDF storage inside XQuery if RDF is more suitable for certain needs.