[osis-core] When an osisID is not an osisID?

[Harry Plantinga]

> I think the previous way we decided to tag this was, e.g.
>
> <verse osisID="John.1.1">
> <verse osisID="John.1.2">
> <verse osisID="John.1.3">
> (John 1:1-3) In the beginning...
> </verse>
> </verse>
> </verse>

Uh-oh, I hope there aren't three quotes that open but don't close in that
section...