SoftwareRelease inherits from doap:Version, which has a doap:revision litteral property.
IMHO, it is more suitable than schema:version which seems to be a number, which seems to have been chosen in the RDF schema.
Note that ADMS uses a RADion:version for a similar property in RADion:Assets which may also be suitable, but I would personally be privileging doap as much as possible if we have the choice in which to reuse.
Comments
Thanks for this excellent suggestion. It has been replaced by the doap:revision property as from v0.5.