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July 6, 2005 Rahul Srivastava After the first release of the W3C XML 1.0 recommendation in early 1998, XML started gaining huge popularity.Sun Microsystems Inc., at that time had just formalized the Java Community Process (JCP), and the first version of JAXP (JSR-05) was made public in early 2000, supported by industry majors like (in chronological order) BEA Systems, Fujitsu Limited, Hewlett-Packard, IBM, Netscape Communications, Oracle, and Sun Microsystems, Inc.But as mentioned earlier, surely it would be loaded so that any entity references can be expanded properly.Since "schema Location" and "no Namespace Schema Location" are just hints, the schemas can also be provided externally to override these hints, using the property " Source".
Developers can write program independent of the underlying XML processor by using the JAXP APIs, and can replace the underlying XML processor by choice without even changing a single line of application code. First of all, there has been some confusion in the past about the P in JAXP: Parsing or Processing?
start Document is called only once before reporting any other event.
Similarly, end Document is called only once after the entire XML is parsed successfully. SAXParser Factory spfactory = SAXParser Instance(); Namespace Aware(true); SAXParser saxparser = SAXParser(); //write your handler for processing events and handling error Default Handler handler = new My Handler(); //parse the XML and report events and errors (if any) to the handler saxparser.parse(new File("data.xml"), handler); DOM parsing is an object-based parsing mechanism, which generates an XML object model: an inverted tree-like data structure, which represents the XML document.
Thereafter, JAXP has evolved to an extent, where now it supports a lot more things (like validation against schema while parsing, validation against preparsed schema, evaluating XPath expressions, etc.,) than only parsing an XML document.
So, JAXP is a lightweight API to process XML documents by being agnostic of the underlying XML processor, which are pluggable.
Therefore, it becomes extremely important to always register a meaningful error handler while SAX parsing an XML document.