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.When using this XML Schema to validate the input XML document, the following error gets reported: ) as defined below has been used in the code examples to validate the input document.

XML DTDs are a subset of those available in SGML and provide a mechanism for declaring constraints on XML markup.

XML DTDs enable the specification of the following: An XML DTD is not itself written in XML, but is a context-independent grammar for defining the structure of an XML document.

Note the following aspects of parsers that perform schema validation: The XML Schema language includes most of the capabilities of the DTD specification.

An XML schema serves a similar purpose to a DTD, but is more flexible in specifying document constraints.

Note the following aspects of parsers that perform DTD validation: A validating XML parser tries to determine whether an instance document conforms to the rules of its associated XML schema.

By using the XDK, you can write a validating parser that performs this schema validation.

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.

) as defined below has been used in the code examples to validate the input document.

The static void process1(String xml URI, XMLSchema schema, Qx Name qname) throws Exception static void process2(String xml URI, XMLSchema schema, Qx Name qname) throws Exception static void process3(String xml URI, XMLSchema schema, XSDNode node) throws Exception and supply the builder with the required schema documents.

For example, you may have downloaded the schemas documents from external Web sites and stored them in a database.

This article shows five ways of how to configure different Java APIs (including DOM, SAX, dom4j and XOM) using JAXP 1.3 for checking and validating XML with DTD and Schema(s).