How to describe software relations in metadata

[mcancellieri]

As part of the European project SoFair (https://sofair.org/) we are working on recommendations for describing Software mentions in the metadata.

Even if not explicitly mentioned in the profile, RIOXXv3 seems to support this pretty well by using something like:

<rioxxterms:ext_relation rel="describes"            
   coar_type="https://purl.org/coar/resource_type/c_5ce6">
           SW Identifier
</rioxxterms:ext_relation>

The only thing I am not convinced about is if the rel field can convey enough semantics to the mention.
Our AI tool discovers both "used" and "created" types for the mention.

By checking the IANA Link Relation vocabulary there's not a direct match, the only ones that can roughly translate are those two, although they were not designed explicitly for this use:

• software is created -> rel="describes"
• software is used -> rel="relates"

Is this the recommended approach?