Validating XML Documents Against Specified XML Schemas

XML Tutorials - Herong's Tutorial Examples

∟Validating XML Documents Against Specified XML Schemas

This chapter provides tutorial notes and example codes on XML validation against XSD schemas. Topics include using JDK to load XSD file; creating Validator; validating XML DOM or SAX source objects; validating XML while parsing using XMLReader interface; installing Xerces-J package.

XSD Schema Validator on XML DOM Object

XSD Schema Validator on XML DOM Object - Errors

XSD Schema Validator on XML SAX Object

SAXParseException - 'xsi:noNamespaceSchemaLocation' Not Allowed

Validating XML Linked with XSD using XMLReader

Takeaways:

The best way to validate XML documents against its XSD schema in Java is to load the XSD schema as a javax.xml.validation.Schema object. Create a javax.xml.validation.Validator object from the schema object. Load the XML document as a javax.xml.transform.sax.SAXSource object. Then apply the validator object on the SAX source object.
If the XML document contains the XSD schema location using the "noNamespaceSchemaLocation" attribute, org.xml.sax.XMLReader can be used to perform the validation while parsing the XML document. This requires the Xerces-J package to be installed.