DocBook and XLIFF

Hello,

I have been looking for means to inject DocBook documents strings into a
translation system (namely pootle) through XLIFF.

I have found a few solutions:
http://transolution.python-hosting.com/
https://open-language-tools.dev.java.net/
http://sourceforge.net/projects/xliffroundtrip/

But what do you use for the purpose of easing translation of DocBook
files for translators used to CAT tools?

Camille.