Validating xml string

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XML documents can be validated against an XML schema definition language (XSD) schema in an Xml Schema Set.

As quite some XML files do use multiple XML Schemas, the code above will always fail.

Configure Java APIs (SAX, DOM, dom4j, XOM) using JAXP 1.3 to validate XML Documents with DTD and Schema(s).

Next, it is possible to validate the XML file against a XML schema.

Many Java XML APIs provide mechanisms to validate XML documents, the JAXP API can be used for most of these XML APIs but subtle configuration differences exists.

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).

In all code listings, the exception handling is omitted as well as the imports. Moreover, this post focus on simple validation code snippets.

First, we can check if the XML file is well-formed.

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XML documents are validated by the Create method of the Xml Reader class. Schema namespace contains extension methods that make it easy to validate an XML tree against an XSD file when using LINQ to XML.

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