The best replacement for sax parser is dom.

The best alternatives to sax parser are rated as following:
★★★★★  dom
★★★★★  dom parser
★★  pull parser
★  stax parser
★  dom parser xml
★  xpath

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Speaking about sax parser, one probably shouldn't forget about schema validation.

Other search terms related to sax parser and their ratings are:
★★★★★ schema validation
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sax parser
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dom parser