Rational® Publishing Engine provides the mechanism for creating or obtaining schemas for several data source types such as Rational DOORS®, Rational Tau, and Rational REST data sources. You must provide the schema for generic XML files as Rational Publishing Engine uses standard XML schema definition for data source schemas. For more information about the standard schema definition, see http://www.w3.org/XML/Schema. You can use a third-party application to create the schema from the XML data.