XML Parser APIs: Tree-Based and Event-Based

• DOM (Document Object Model).

  • DOM Level 1 and Level 2 W3C recommendation. Widely implemented, Tree-Based. Hierarchy of nodes. Loads entire document into memory. Level 2 adds namespace support, traversal, stylesheets, events, triggers. Level 3 working draft. DOM HTML candidate. Parsers allow developers to iterate through documents, change document content.

• SAX (Simple API for XML).

  • Open-source, XML-DEV, not W3C. Event-based, fires events as it reads document, need not load entire document into memory. Good for single-pass processing. Xerces, XML4C, Sun Project X (Crimson).

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