You can create a sample XML Document by opening the XML Schema (XSD) and selecting:
Tools->Create Sample XML Document
The new XML Document will include a schema location attribute to associate it with the XSD.
When you click Validate, Liquid XML Studio will then will validate the XML Document using the associated XML Schema.
http://support.liquid-technologies.com/KB/a98/how-to-create-a-sample-xml-document-from-an-xml-schema-xsd.aspx