As I read the draft, there's no way for a locator to address a span of
elements, despite a number of statements to the effect that resouces
need not be points. Have I missed something, or is there a gap here?
I think spans are absolutely crucial for stand-off annotation,
e.g. what I write now in our local normalised SGML as
<sentence from='(ID) w37' to='(ID) w52'></sentence>
with an inclusion semantics, so this is processed as
. . .