Navigation path usable with the Open operation.
OptionalpositionSort order among the targets resolved for one query. A resolver that only produces a generic path —
the database subtree, which guarantees every ECHO object a path but is not where the tree shows
it — declares Position.last, so a resolver that knows the object's canonical home (its collection,
a type section) is preferred. Only the resolver knows how specific its answer is, hence a declared
position rather than path sniffing by the caller.
Object type.
Human-readable label.