PREIN
/bin/sh
if [ $1 -gt 1 ]; then # Upgrade => deregister old extension unopkg remove --shared org.openoffice.da.writer2xhtml.oxt || : fi
PREUN
/bin/sh
if [ $1 -eq 0 ]; then # not upgrading => deregister unopkg remove --shared org.openoffice.da.writer2xhtml.oxt || : fi
POSTIN
/bin/sh
# register extension unopkg add --shared --force --link /usr/share/openoffice.org/extensions/writer2xhtml.oxt || :