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!