If the parser is not compliant with the JAXP spec, and therefore does not support XML Schema, it can throw a , 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, namely for the elements that are typically defined in any simple, uncomplicated XML document.Because JAXP-compliant parsers are not namespace-aware by default, it is necessary to set the property for schema validation to work.
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(If a combination is not supported by a particular implementation, it is required to generate a factory configuration error).
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 existing schema written in the XML Schema language.
Note - More information about namespaces is included in Validating with XML Schema in Document Object Model.
For now, think of these attributes as the "magic incantation" you use to validate a simple XML file that does not use them.
option and providing the name of the schema source file to be used.
It is important to recognize that the only reason an exception is thrown when a file fails validation is as a result of the error-handling code shown in Setting up Error Handling. public void warning(SAXParse Exception spe) throws SAXException public void error(SAXParse Exception spe) throws SAXException public void fatal Error(SAXParse Exception spe) throws SAXException // ...(Even a DTD qualifies as a "schema," although it is the only one that does not use XML syntax to describe schema constraints.) However, "XML Schema" presents us with a terminology challenge.Although the phrase "XML Schema schema" would be precise, we will use the phrase "XML Schema definition" to avoid the appearance of redundancy.If these exceptions are not thrown, the validation errors are simply ignored.In general, a SAX parsing error is a validation error, although it can also be generated if the file specifies a version of XML that the parser is not prepared to handle.By default, Input Source is = new Input Source(new File Input Stream(my Xml Document)); Validator v = new Validator(is); XMLSchema(true); JAXP12Schema Source(new File(my Xml Schema File)); boolean is Valid = Valid(); designed for validations of snippets of XML against different schema languages.