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There are two ways to do that: , which stands for "XML Schema instance." The second line specifies the schema to use for elements in the document that do not have a namespace prefix-that is, for the elements you typically define in any simple, uncomplicated XML document.
A JAXP implementation could legally use a DOM parser in this case, but there is no reason to. Set Error Handler() as in the example in this SO question stackoverflow.com/questions/4864681/…?
To report errors, it is necessary to provide an Error Handler to the underlying implementation.
The Error Handler used for the examples is a very simple one which reports the error to and continues until the XML document has been fully parsed or until a fatal-error has been reported.
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.
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.
This section looks at the process of XML Schema validation.
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.
// 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.
W3C_XML_SCHEMA_NS_URI); // load a WXS schema, represented by a Schema instance Source schema File = new Stream Source(new File("my Schema.xsd")); Schema schema = Schema(schema File); // create a Validator instance, which can be used to validate an instance document Validator validator = Validator(); // validate the DOM tree try catch (SAXException e) on a parser factory.
Many Java XML APIs provide mechanisms to validate XML documents, the JAXP API can be used for most of these XML APIs but subtle configuration differences exists.