[dev-context] wrong XML snippet?

Hans, I’m not sure I understand the differences between postion(), match() and and index() [https://www.pragma-ade.com/general/manuals/xml-mkiv.pdf#page=34]. The XML snippet that comes with them only makes sense to me when <resources> and <collections> have their tags closed. I attach the diff containing what I think is the right way to do it. Many thanks for your excellent work, Pablo