Re: IRI with compatibility character, unwise?

Thanks to all; comments have been helpful.

In response to Martin's question about change to Jena ...

We are currently thinking about doing a rather better job of IRI support 
than we have at the moment; it is not yet specified, but would minimally:
- be based on RFC 3987 (and 3986)
- also support the 'legacy' concept of RDF URI Reference, but warn when 
a non-IRI, RDF URI Reference occurs.

It would be best if it could offer the sort of analysis that went into 
this support request.

I think from our point of view there are some clear advantages to IRIs.
Is there an off-the-shelf open source Java package that does say the 
equivalent of java.net.URI with the various IRI nuances.

Jeremy