If I read it correctly,
the parsing of the query string is decoupled from this. So somebody could also
create another query syntax and reuse all processors and builders?
Yes, as far as the processors know how to process the node your text parser creates. The QP framework was really designed to have processing decoupled from the syntax.
I was not able to look into the new framework
in detail (I only looked into the Powerpoints on Michael Bís Linkedin profile
page), but it would be good to have a howto like this mail somewhere in the
wiki or docs.
I plan to do it, I just need to find some free time :)