Dan Connolly has been experimenting with creating RDF databases from email archives.

In order to run a large scale query over his email archive, Connolly devised an RDF schema for email, and a conversion Perl script.

In his mail, Connolly expressed frustration that he did not have an RDF representation for inference rules, but later followed up with a design for just that.

He ends by commenting on the improvements required to his XSLT-based RDF parser:

this rule design relies on reification, so I added a little bit of reification support to my XSLT-based RDF parser.