[Exist-development] Licensing for XQuery grammar (ljo branch)

[<fi...@us...>]

I'm concerned about some files which were recently committed to the ljo 
branch:
http://exist.svn.sourceforge.net/exist/?rev=10949&view=rev

The files were released under the Apache 2.0 license, which is not compatible 
with the LGPL v2 (or 2.1). The rest of the code is licensed under LGPL v2 (or 
later).

I am not a lawyer, so this is not a legal analysis, but my impression is that 
changing the license for eXist to LGPL v3 (or later) is an option because v3 
is compatible with Apache 2.0. Or, a more difficult approach would be to 
release eXist-ljo under LGPLv2.1 or later, and eXist+ljo under LGPL v3 or 
later. Another option may be to ask the copyright holder(s) on the xqgrammar 
software (Nikolay Ognyanov, et al.?) to release their code under a dual 
license including LGPL 2.1.

And I guess yet another option would be to find or write another compatible 
xqgrammar.

Does this make sense?
Luigi