Xml processors
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An XML processor takes an XML document and DTD file as input and processes them so that applications can access the information. There are two main API approaches for XML processors - SAX and DOM. SAX is an event-based approach where the processor signals events to the application as it recognizes syntactic structures. DOM builds a hierarchical tree of the document in memory that can then be randomly accessed by applications. SAX is faster but DOM allows random access and rearranging of the document.
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Xml and multimedia database
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uptu web technology unit 2 Xml2
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Python xml processing
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Xml processors
- 1. XML PROCESSORS AN XML PROCESSOR IS A NECESSARY PIECE OF THE XML PUZZLE. THE XML PROCESSOR TAKES THE XML DOCUMENT AND DTD AND PROCESSES THE INFORMATION SO THAT IT MAY THEN BE USED BY APPLICATIONS REQUESTING THE INFORMATION.
- 2. PURPOSE OF XML PROCESSORS • • • •
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- 4. SAX APPROACH • The simple API for XML(SAX) was released in may 1998 was developed by XML user group ,XML-DEV • It has been widely accepted as a de facto standard and is now widely supported by xml processors • This approach is called event processing. • Whenever a syntactic structure of document is recognized the processors signals an event to application by calling event handler.
- 5. DOM APPROACH • Document object model(DOM) builds a hierarchical syntactic structure of the document. • The parser part of xml processors builds the DOM tree. • Nodes of tree are represented as objects that can be accessed and processed or modified by the application. • After parsing the DOM representation is in memory and can be accessed using tree traversals as well as random accesses.
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