Assign Schema
The DTD/Schema | Assign Schema... command is enabled when an XML document is active. It assigns an XML Schema to an XML document, thus allowing the document to be validated and enabling intelligent editing for the document. The command opens the Assign File dialog to let you specify the XML Schema file you wish to assign. You can also select a file via a global resource or a URL (click the Browse button) or a file in one of the open windows in XMLSpy (click the Window button). Note that you can make the path of the assigned file relative by clicking the Make Path Relative To... check box. When you are done, your XML document will contain an XML Schema assignment with the required namespaces. The schema assignment will look something like this:
xmlns="http://www.xmlspy.com/schemas/icon/orgchart"
xmlns:xsi="http://www.w3.org/1999/XMLSchema-instance"
xsi:schemaLocation="http://www.xmlspy.com/schemas/icon/orgchart http://schema.xmlspy.com/schemas/icon/orgchart.xsd"