Although a full treatment of XML Schema is beyond the scope of this tutorial, this section shows you the steps you take to validate an XML document using an XML Schema definition.
(To learn more about XML Schema, you can review the online tutorial, XML Schema Part 0: Primer.
These are the same constants you define when using XML Schema for SAX parsing, and they are declared at the beginning of the Because JAXP-compliant parsers are not namespace-aware by default, it is necessary to set the property for schema validation to work.
You also set a factory attribute to specify the parser language to use.
) as defined below has been used in the code examples to validate the input document.
The input document contains an extra attribute which has not been defined in the XML Schema, this shows that the XML Schema has been used for the validation.
@ziggy - this is an implementation detail of the JAXP implementation. URL schema File = new URL(" // webapp example xsd: // URL schema File = new URL(" // local file example: // File schema File = new File("/location/to/localfile.xsd"); // etc.If you use a DOM parser explicitly for validation, you will definitely instantiate a DOM tree. Is is a case of just creating the Error Handler and associating it with the validator? // parse an XML document into a DOM tree Document Builder parser = Document Builder Instance()Document Builder(); Document document = parser.parse(new File("instance.xml")); // create a Schema Factory capable of understanding WXS schemas Schema Factory factory = Schema Instance(XMLConstants. If I use an Error Handler (own class that implements Error Handler) instead, it recognizes all errors, but the try-catch-block of validator.validate does not throw any Exception..The former technique will cause parsers to use the new validation API; the latter will cause parsers to use their own internal validation facilities.Turning on both of these options simultaneously will cause either redundant behavior or error conditions.