QVT14 — QVTr: Undefined semantics

The whole Concrete Syntax section deserves a much more substantial description.

In particular...

The mechanism by which a package name is located is unresolved, perhaps deliberately,
but the omission should be explicit.

What constraints exist on forward referencing of names?

Transformations and mappings could be ordered so that forward references are avoided,
but large modules benefit from an alphabetical ordering of elements, so requiring
a parser friendly order is not user friendly.