If you have an XML file or its DTD/XSD, then simply upload the this file in the XML Schema creation screen and automatically the XML schema activity is created.
If the XSD that is being uploaded to create the XML schema contains namespace references to other XSDs then choose one of the following options:
1. Provide full path for the reference XSD's location in the main XSD
2. Or place the reference files in the Adeptia install directory's ../web/WsXSD folder and give the location as