Product contribution role copyright-owner


Hi,

Could you add role Product contribution role "copyright-owner" ?

https://skg-if.github.io/interoperability-framework/docs/research-product.html#contributions 

http://purl.org/spar/pro/copyright-owner 

we have at the moment roles  :  author, editor, and publisher.

Thanks,

request from Raul for RoHub/Ro-crate mapping.