need a way to extract content from xml files

while json is the new kid on the block, xml is not going to go away anytime soon, and it is often used for buildsystem relevant things:

• qt designer qrc files
• visual studio's embedded toolchain configurations
• [add more]

possible approaches (in order of decreasing comfort):

• integrated xquery processor
  • "proper" js-based library
  • xmlpatterns
• qdom
• qxmlstreamreader