When reading XML file, a session can be configured to validate XML sources. The validation in PowerCenter is based on XSD/DTD validation.
In order to enable XML validation, the following conditions have to be true:
•The session property Validate XML Source on the XML source should be set to Validate only if DTD/Schema is present or Always validate.
•The source XML file should have a reference to the XSD file. This can be done by providing the schemaLocation attribute in the root element of the XML document.
This will refer to the source.xsd file which can be found in the same directory as the XML source.
More Information
Validate only if DTD/Schema is present will only validate the source XML if the reference to the XSD schema is present in the XML file.
Always validate will try to validate the source XML even without the reference to the schema.
When validation is performed on a XML file without the schema reference, you will encounter session errors indicating that the root element of the provided XML source is not defined:
XML Reader: Error [ElementNotDefined] occurred while parsing:[Error at (file e:\source.xml, line 6, char 2 ): Unknown element 'root'.];
