Validating schema c

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.

Register the method Validation Error with the settings object's Validation Event Handler.

The Validation Error method is called if the document being read is found to be invalid or an error occurs (for example, the document cannot be found).

This tutorial explains the procedure for performing that validation using parsers for the Simple API for XML (SAX) and Document Object Model (DOM), as well as an XML Schema Design (XSD) validator.

attribute for an XML Schema without namespaces, in the root/top-level element, or in any other element of the XML Document.

To be notified of validation errors in an XML document, the following must be true: It is helpful to start by defining the constants you will use when configuring the factory.

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.

(For SAX parsing, on the other hand, you set a property on the parser generated by the factory).

Failure to register a method with Validation Event Handler causes an exception (Xml Exception) to be thrown when the XML document is found to be invalid or missing.

After setting the Validation Type property, the Schema's property and Validation Event Handler of the Xml Reader Settings object, we are ready to create a validating Xml Reader.

In our case, we'll use the example of an XML document, Xml Document Url, that contains an As I explained previously, an XML Schema—in our example, Schema Url—defines the structure of an XML document.


  1. Jeremy Davies was born in Traverse City, Michigan, of Scottish and Welsh descent, the son of children's author Melvin Lyle "Mel" Boring.

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