Validating the xml

11 Dec

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).

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If you want to validate against multiple schemata, use one validation set per schema.

All three provide identical APIs in lxml, represented by validator classes with the obvious names.

lxml also provides support for ISO-Schematron, based on the pure-XSLT skeleton implementation of Schematron: There is also basic support for The parser in lxml can do on-the-fly validation of a document against a DTD or an XML schema.

I'll show you how to take advantage of some of these features, which will translate to better-performing, more standards-compliant XML data in your applications. The XML schema file is usually an XML-Data Reduced (XDR) or XML Schema Definition (XSD) file.

I'll also walk you through some of the different scenarios and ways in which you can validate an XML document with an XSD schema programmatically (see Table 1). NET Framework 2.0 means you can perform XML data validation against a Document Type Definition (DTD) or an XML schema. XSD schema-based validation is the industry-accepted standard and will be the method of XML validation in this article.