I have an existing RDF Schema, in which a few of the elements have 'ranges' specified, in an external file.

I now want to use this Schema for a second project, but with a few additional elements. I've created an RDF Schema for these additional elements. However, some of the elements are the same as in the original, but with a more extensive 'range'. Is there any means, in RDF Schema, to specifcy that an element has the same range as another, but with some additional ones as well? As far as I can see, there is no way to specify two ranges for an element...

Any help gratefully accepted....Ta...

Dan