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Working with XML
Developing with XML in OpenEdge : Developing XML-enabled ABL applications with SAX : SAX advantages

SAX advantages

The general advantages of SAX include:
*The nature of a streaming model means that you need far less memory to process large XML documents.
*You do not have to process the entire document. Use callback procedures to identify and respond to only the XML elements you are interested in.
*You can halt the parse at any time.
*You can parse an XML document that is not well formed.
*SAX provides callback procedures that let you to provide more error handling.