Lightproof is a grammar checker extension generator (see doc/manual.txt):
the result of the generation is a single Lightproof or vendor specific
grammar checker language package, eg. lightproof-en_US.oxt or
your-grammar-checker-en_US.oxt.
native OpenOffice.org Options support (see Options->Language Settings
after the installation of en_US or hu_HU oxt packages of the Lightproof
distribution). Documentation: doc/dialog.txt
extended and simplified rule syntax
new library functions for spelling, suggestion, etc.