DOCBOOK-APPS: Looking for "swc"

[Bernd Kreimeier <bk@oddworld.com>]

I need an SGML/XML-aware version of wc to count words, lines, etc.
directly onm SGML source. I used some db2txt right now, is there a
a direct way to do this (in the way of sgrep)?

Thanks,

                                          b.