Xml Schema Websites
XML Editor
oXygen XML Editor is a cross platform XML Editor providing tools for XML authoring, XML conversion, XSL, XSLT, XQuery, XML Schema, DTD, Relax NG and Schematron development, SOAP and WSDL.
XML Editor, Data Management, UML, and Web Services Tools from Altova
Altova XMLSpy XML editor, plus other leading XML, data management, UML, and Web services software tools for application, web site, and database development, data conversion, and more.

xFront: Tutorials and Articles on XML and Web Techologies
A collection of XML and web service articles and tutorials
XMLBlueprint XML Editor
The XML Editor and XSLT Editor for Windows. This XML Software supports XSDs, DTDs, Relax NG Schemas, Schematron.
:: Ontology Matching ::
ontology matching: papers, tutorials, matching systems, evaluation
LuMriX XML Solutions for Enterprises
LuMriX.net offer IT Services for content management and information retrieval. Our customers are coming from the public domain, media, health care sector, and information providers / portals