---+ The OpenGIS Protocols

   * OpenGIS documents: http://www.opengis.org/specs/?page=specs
      * Web Feature Service: http://www.opengis.org/docs/02-058.pdf
      * Filter Encoding: http://www.opengis.org/docs/02-059.pdf
   * OpenGIS abstracts: http://www.opengis.org/specs/?page=abstract
   * OpenGIS schemas: http://schemas.opengis.net/

---++++ Documents related to OpenGIS and SOAP

   * OWS 1.2 SOAP Experiment Report: http://www.opengis.org/docs/03-014.pdf
   * OpenGIS moves to SOAP: http://www.opengis.org/press/?page=pressrelease&view=20040318OWS2PR
   * Ionic creates SOAP service for OGC: http://www.ionicsoft.com/pressroom/WSDLSOAP_PR.jsp