Edit C:\Program Files (x86)\Microsoft SQL Server\90\Tools\Binn\VSShell\Xml\Schemas\catalog.xml

??<SchemaCatalog xmlns="http://schemas.microsoft.com/xsd/catalog">
  <Schema href="%InstallRoot%/Common7/IDE/Policy/Schemas/TDLSchema.xsd" 
          targetNamespace="http://www.microsoft.com/schema/EnterpriseTemplates/TDLSchema"/>
  <Schema href="%InstallRoot%/Common7/IDE/Policy/Schemas/Policy.xsd" 
          targetNamespace="http://schemas.microsoft.com/VSPolicy/PDLSchema"/>
  <Schema href="%InstallRoot%/xml/schemas/%LCID%/snippetformat.xsd" 
          targetNamespace="http://schemas.microsoft.com/VisualStudio/2005/CodeSnippet"/>
  <Schema href="%InstallRoot%/xml/schemas/%LCID%/vstemplate.xsd"
          targetNamespace="http://schemas.microsoft.com/developer/vstemplate/2005"/>
  <Schema href="%InstallRoot%/xml/schemas/%LCID%/Microsoft.Build.xsd"
          targetNamespace="http://schemas.microsoft.com/developer/msbuild/2003"/>
  <Schema href="%InstallRoot%/xml/schemas/%LCID%/vscontent.xsd"
          targetNamespace="http://schemas.microsoft.com/developer/vscontent/2005"/>
  <Schema href="%InstallRoot%/common7/packages/SDM/Schema/SystemDefinitionModel.xsd" 
          targetNamespace="http://schemas.microsoft.com/SystemDefinitionModel/2005/1" />

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