Span locators identify a pair of points in a document.
Nothing is returned.
Yes, this is a real problem, but I chose to ignore th issue of whether endpoints are inclusive or exclsive until I had made my point about their relevance. Sorry for lapsing into HyTime-ism. And that API issue was the problem that Peter was raising at the start of the thread. Just don't try to climb on spans and this problem goes away. I'm sorry I wasn't clear.