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To keep the example simple this program generates a XML file from a Vector preloaded with hard coded data.The steps involved are a) Get an instance of DOM parser b) Create a new Document c) Load the Data d) Create a DOM tree with this Data e) Print the DOM tree which will be the XML file In detail a) Get an instance of DOM psrser to the same directory where you have downloaded these programs.A SAX processor will pass the following events to a Document Handler: Advantages: (1) It is good when random access to widely separated parts of a document is required.(2) It supports both read and write operations Disadvantage: (1) It is memory inefficient Because DOM consumes more memory to construct the XML tree Object in the memory corresponding to the input XML its not advisable to use for parsing large XML documents In that case SAX is preferred over DOM. (2) It is memory efficient as SAX parser does not keep any of the document tree in memory.Diagnostics for failed tests are presented in italics, with a cherry colored background, to highlight the result.Diagnostics for succesful tests should as a rule only exist for negative tests.Mapping is the way of transforming one XML structure to another XML Structure bsed on the Business rules. But in case of graphical mapping XI/PI converts the mapping program into executable Java code internally based on graphical design and executes it on J2ee engine making it comparatively less efficiency.As a part of it we do certain operations like breaking child nodes and attaching them to its parent node and more in an XML structure. Java mappings are more useful when performance of integration server is concerned during runtime.

Some such comments indicate the reporting category defined in the XML specification.

In XI/PI we have the following mapping techniques 1. Java mappings are Parsing Programs that can be developed in NWDS (Net Weaver Developer Studio), import as files and make use of in the mapping part of Integration Repository.

Among all the above mapping techniques JAVA mappings improves the performance and are preferred as they gets executed on J2ee engine directly.

When a Sax parser parses a XML document and every time it encounters a tag it calls the corresponding tag handler methods when it encounter a Start Tag it calls this method public void start Element(String name, Attribute List attrs) when it encounter a End Tag it calls this method public void end Element(String name) This program also parses a XML file and prints it on the console . In this example, the Print Using Sax Class extends the Handler Base class and implemets the call back methods to handle the printing The steps involved are Get a instance of SAX parser, The previous program illustrated how to Parse an existing XML file using both SAX and DOM Parsers.

But generating a XML file from scratch is a different story , for instance you might like to generate a xml file for the data extracted form the database.

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NWDS provides suitable Java environment and higher level tools to parse XML documents through the Simple API for XML (SAX) and the Document Object Model (DOM) interfaces.