16 How good does open source talk OpenGIS? A state of affairs with respect to OpenGIS standards, i.e. standards of the Open Geospatial Consortium (OGC), in open source software. How good do the different projects communicate through OpenGIS standards? Several open source projects (among others Mapserver, Geoserver, MapGuide Open Source, Mapbuilder, Chameleon, uDIG) will be evaluated with respect to their implementation of OpenGIS specifications (for instance WMS, SLD-WMS, WFS, WMC). Do they talk well out of the box, or does it need specific tips and tricks to get things running? Do the clients (Chameleon, uDIG, Mapbuilder) communicate well with proprietary systems like ESRI's ArcIMS or Ionic Red Spider? FOSS4G2006 - Free And Open Source Software for Geoinformatics Session 2 : SDI-OGC-Security Assefa Yewondwossen assefa@dmsolutions.ca Bart van den Eijnden bartvde@xs4all.nl Tom Kralidis tom.kralidis@ec.gc.ca Assefa Yewondwossen assefa@dmsolutions.ca Bart van den Eijnden bartvde@xs4all.nl Tom Kralidis tom.kralidis@ec.gc.ca OGC