By default, WebLogic Server is configured to use the built-in parser and transformer to parse and transform XML documents. In release 7.0, the built-in XML parser is Apache Xerces and the built-in transformer is Apache Xalan. As long as you use the default, you do not have to perform any configuration tasks for your XML applications. If you want to use a parser or transformer other than the built-in, you must use the XML Registry to configure them.
Use the Configuration tab to specify a parser for a particular document type based on either its System ID, its Public ID, or its root element. You can configure the parser used for DOM style parsing, SAX style parsing, and transformations by entering the appropriate factory class.
