Resource description framework (rdf) is a standard model for data interchange on the web.

test::rdf::doap::version reads all rdf in a distribution's "meta" directory and checks the distribution metadata matches the pattern:

?uri doap:release ?rel .
?rel doap:revision ?ver .
where ?uri is the uri "http://purl.org/net/cpan-uri/dist/$dist/project" and ?ver is "$module->version", as an xsd:string or plain literal.