Hi, I am creating an XSD which looks like this: <?xml version="1.0" encoding="utf-8"?> <xs:schema targetNamespace="http://www.isotc211.org/2005/gmd" elementFormDefault="qualified" version="0.1" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:gmd="http://www.isotc211.org/2005/gmd"> <!-- ================================= Annotation ================================ --> <xs:annotation> <xs:documentation> This file was generated from ISO TC/211 UML class diagrams == 01-26-2005 12:40:04 ====== </xs:documentation> </xs:annotation> <!-- ============================= Imports & Includes ============================= --> <xs:import nameSpace="http://www.w3.org/2001/XMLSchema" schemaLocation="http://www.w3.org/2001/XMLSchema.xsd"/> <xs:import namespace=" http://www.w3.org/1999/xlink" schemaLocation="http://www.isotc211.org/2005/xlink/xlinks.xsd"/> <xs:include schemaLocation="../gmd/metadataApplication.xsd" /> <!-- ########################################################################### --> <!-- ########################################################################### --> <!-- ================================== Classes ================================= --> </xs:schema> As I create this XSD everything is fine until I add the schemaLocation hint of "http://www.w3.org/2001/XMLSchema.xsd". Oxygen then locks up. I have to use Windows task manager to delete the application. What is wrong with identifying the XSD schema for a schemaLocation hint in a import statement? Thanks. John