[oXygen-user] importation of a remote schema problem

[Eric Jahn]

I have a schema here: 
http://www.hmis.info/schema/2_8/HUD_HMIS_2_8.xsd
which in turn imports this schema: 
http://www.hmis.info/schema/2_8/AIRS_3_0_draft5_mod.xsd

If I copy the latter schemas locally and give a SchemaLocation to the
local copies, it validates fine.  However, if I remove the local
SchemaLocation statement, I get this validation error from Oxygen 9.1:
 
"[Xerces] src-resolve: Cannot resolve the name 'airs:tSiteService' to
a(n) 'type definition' component. @see:
http://www.w3.org/TR/xmlschema-1/#src-resolve
reposHUD/tags/HUD_HMIS_XML_2.8 HUD_HMIS_2_8.xsd line 828 1208818729409
195997"

Why can't Xerces/Oxygen validate against the remote copy of the imported
schema?  I tried declaring it in the XML Catalog in Prferences, but it
didn't help.  

Any insights are very appreciated.  Thank you!