I'm thinking about using semantic (web) technogies like RDF and OWL in an application on mobile devices. Currently I'm targeting android, but I'd also be interested in the possibilities on the iPhone and on J2ME.

I would like to use a lib instead of implementing everything from scratch. I know that there are some libraries and frameworks like Jena, Redland, Protégé but they don't state on which platforms they are known to work.

Having a dynamic object model and parsing from and to XML are must-haves for me. I'd also like to use reasoning, but I've been told it was rather computing-intensive, so that's only a nice-to-have.

For all platforms mentioned, the question can be interpreted as

• Is it possible in theory (especially for J2ME I'm not sure)
• Are there libs that are known to work on those platforms?
• Is the performance on a mobile platform good enough for real world usage?