George Cristian Bina wrote:
Dear Gary Gapinski,
Thank you for contacting us. oXygen uses Xerces for XML Schema validation. In the past Xerces used a one schema per namespace rule and with version 2.7.0 Xerces added support also for allowing multiple schemas for a namespace and oXygen added that as an option. By default that option was enabled in oXygen 6.1 and you have xml.xsd schema imported from more than one location thus the duplicate definitions of the attributes. Please go to Options->Preferences dialog on the XML / XML Parser Options page and disable the http://apache.org/xml/features/honour-all=schemaLocations option in the XML Parser Features group. That will switch to one schema per namespace and your documents will be valid.
Thanks, George. This corrects the problem. (Now, I'll have to look closely to learn just how this occurs.) Regards, Gary