> > in the case that I want to use these URLs with a web browser. > > I don't understand what the trouble with the above example is?
The problem with # is that browsers treat them as the start of a local reference. When you open http://example.org/book#1 the server only receives http://example.org/book. In other words it would be an error to create nodes for n different books (#1 #2 #3 #n) if my goal is also to use these URLs with a browser (for example if I want to show one page for every book). It's not a problem with Jena, it's a problem with the way browsers treat the fragment.
