Can't access esri xml workspace document schemas

[VesaLaakko]

I exported xml workspace document from my filegeodatabase. I tried to deserialize it to c# object, but there are some problems, so I would like to validate the document. When I try to validate it with XML spy, I get "Unable to locate a reference to a supported schema type.."
XML document starts like

<esri:Workspace xmlns:esri="http://www.esri.com/schemas/ArcGIS/10.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<WorkspaceDefinition xsi:type="esri:WorkspaceDefinition">
  <WorkspaceType>esriLocalDatabaseWorkspace</WorkspaceType>
  <Version/>
  <Domains xsi:type="esri:ArrayOfDomain"/>
  <DatasetDefinitions xsi:type="esri:ArrayOfDataElement">
   <DataElement xsi:type="esri:DEFeatureClass">...

so I tried open http://www.esri.com/schemas/ArcGIS/10.0 in browser, but got only "HTTP Error 404.0 - Not Found" Is this normal?
How could I get access to that schema, and/or how could I validate my document?

t. Vesa