Re: Using the same .owl file with Protege 3.4 and Protege 4?
In theory as long as you do not use OWL2 constructs in an ontology in p4 you should be able to save a file in RDF/XML and load it in P3.4.
I would like to understand the cause of your increasing frustrations with p4. What import/export feature is critically missing?
I would have thought being able to export OWL (w3c recommendation) was quite a good start.