www-rdf-rules@w3.org from April 2003: SeRQL: new QL proposal implementation result set format After looking through it, it looks like something I'll want to try to implement. Many more constructs than regular RDQL.
LBase: Semantics for Languages of the Semantic Web Haven't read this one yet. Not sure it's gained any traction out there yet. It's been used in the RDF Model Theory document.