RDF Net API.

a simple network interface to remote RDF models. There are two sets of functionality: a basic access mechanism that provides query capability to a collection of RDF statements, and an update mechanism where, subject to security constraints (not discussed here), changes to the RDF model can be made. Simple network APIs encourage implementation because of the minimal burden on the implementer. This document also covers are two implementations, one based on SOAP, one based directly on HTTP.

http://www.w3.org/Submission/2003/SUBM-rdf-netapi-20031002/#soap_binding