As discussed on Skype, it would be useful to investigate whether Spira could directly make use of RDF::Literal subclasses instead of defining its own largely equivalent datatype hierarchy. I'm perfectly okay with Spira monkey-patching the relevant RDF.rb classes, and also willing to consider, where it makes sense, pushing some of the functionality needed by Spira down to RDF.rb itself.
New thoughts on this?
This project has moved to ruby-rdf/spira. If this issue is still relevant, please resubmit it over there.