Daniel Veillard's libxml
(ftp://ftp.gnome.org/pub/GNOME/sources/libxml/)
and/or
Jim Clark's expat (http://www.jclark.com/xml)
Daniel Veillard's libxml
(ftp://ftp.gnome.org/pub/GNOME/stable/sources/libxml/)
and/or
Jim Clark's expat (http://www.jclark.com/xml)