Steve Newcomb wrote:

When we mess with a document that straddles
           N universes of constraint-specification, we
           shouldn't have to first pretend that it occupies
           space in only one of them at a time in order to
           test the validity of some component in each of
           them. We should be able to take a broader view,
           working in a meta-universe that contains all of
           the document's universes. In such a meta-space,
           we can comprehensively validate each individual
           component of such a document, in its living context.

Steve, this is awesome. Thank you.

/Roger