libyang is not able to parse generic extensions defined in YANG schema. The currently supported extensions are only
- get-filter-element-attributes from ietf-netconf,
- default-deny-write from ietf-netconf-acm,
- default-deny-all from ietf-netconf-acm.
All other extension definitions/instances are currently ignored and only warning
Not supported "<name>" extension statement found, ignoring. is printed.
libyang uses its own XPath implementation to evaluate XPath expressions. The implementation completely lacks support for axes. nevertheless, it should always be possible to write equivalent expressions without the use of axes.