xStructure doesn't resolve my XML file !

May I associate mappings to a XML file without model declaration ?

Not in the 1.0 version. Note this feature is planned, using file path matching.

What's about XPath implementation ?

All default mappings are defined using default implementation. XPath implementation is slower since resolution context includes the whole file, whereas the default implementation is based on current node context.

However, XPath works and provides more flexibility to build label or tooltip. I'll see how I can improve this implementation type.