Need the ability to use a single path syntax for runtime and design time paths.
This means allowing criteria to be entered into the path. I would suggest that
this is something like [at0002, @name="upper quadrant"]. This means we accept
that [at0002] is short for [@archetype_node_id="at0002"].
A special case of this type is the binding of terms, when there are other values
that must be set. Consider that binding of the LOINC term for oral temperature.
This must be bound to the node temperature, with the criteria that the 'site of
measurement' is 'oral'.