Ryan authored May 07, 2012 and Daniel Veillard committed May 07, 2012

When playing with xpath in the xmllint shell, it's really handy to be
able to ask where the returned nodes live in the tree, in the same
way "pwd" asks where the current node lives.

The feature is actually quite easy to implement by combining the
functionality of the existing dir/ls and pwd commands (see proposed patch).

Example usage:

/ > whereis //last_name
/clinical_study/overall_official/last_name
/clinical_study/location/contact/last_name
/clinical_study/location/investigator/last_name