Very simple API, adapted for one-off project and not too broken xml (like html for instance).
(2008-10-29) The only Ocaml XML parser that can handle the complexity of the MathML2 DTD.
Handles unicode.
Still maintained (2008-11).
Simpler than pxp and more complete/correct than xml-light.
Xml-Light or Xmlm are probably easier to use than Yaxpo. Yaxpo provides the weird reentrancy stuff enabled by the astounding fallacy of an XML parser written entirely in CPS.