Java validating xml against schema
Sometimes validation is performed while parsing, sometimes immediately after.However, it's usually done before any further processing of the input takes place.If an XML schema URL is not specified and the XML document is schema-based, then the conformance is checked against the own schema of the - Element of a specified schema, against which to validate.This is useful when we have an XML schema which defines more than one top level element, and we want to check conformance against a specific one of these elements.For example, Listing 2 shows a program that validates Doc Book documents against Doc Book's RELAX NG schema. The only things that have changed are the location of the schema and the URL that identifies the schema language. Implementations are free to add other URLs to this list to identify other schema languages.Typically, the URL is the namespace Uniform Resource Identifier (URI) for the schema language. However, you can install additional libraries that add support for these and other schema languages.
In addition, for schema-based XMLType instances, the database performs few basic validation checks.Java 5 introduced the package to provide a schema-language-independent interface to validation services.This package is also available in Java 1.3 and later when you install JAXP 1.3 separately.A single implementation usually supports only a subset of the numerous languages and models.However, once you learn the API for validating DOM documents against RELAX NG schemas (for instance), you can use the same API to validate JDOM documents against W3C schemas. Schema Instance(Schema Factory.java:186) at Docbook RELAXNGCheck.main(Docbook RELAXNGCheck.java:14) This isn't a closed list.