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In this section we shall validate the example XML document with XML schema document catalog.xsd, with the SAXParser class. Create a SAXParser object and set the validation mode of the SAXParser object to SCHEMA_VALIDATION, as shown in the following listing: Validates the complete XML document with an XML schema if the parser is able to find a schema.
If the parser is not able find a schema or if the XML document does not conform to the schema, an error is raised.
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.
Next, create an XMLSchema object from the schema document with which an XML document is to be validated.
This is the reason why (most of the) XML parser implementations do not support XML Namespaces by default, to handle the validation of XML documents with namespaces correctly it is therefore necessary to configure the underlying parsers to provide support for XML Namespaces.
[This sample application uses a feature that was first implemented in MSXML 4.0.]With MSXML 4.0 and later, validation support for SAX applications was added.
This example demonstrates that functionality by showing you how to create a simple SAX validator application in Microsoft® Visual Basic® 6.0.
Validates the XML string/file against the specified XSD string/file.
XSD files are "XML Schemas" that describe the structure of a XML document.