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Simple XPath evaluator which runs against a SAX stream. Build Status

Supported XPath construct as of writing are:

  • '/'-axis (child)
  • '//'-axis (self-or-descendant)
  • node name tests, including namespaces
  • predicate test (@ = "")

Inner workings

A state machine is built which the SAX-nodes are tested against. If a node matches, the state machine progresses.

For self-or-descendant-nodes, the state machine is forked and earch fork (including the parent) is tested against the SAX-nodes. This ensures all nodes are matched. See test/saxpath.js and test/inception.xml for an example.

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