DOCBOOK-APPS: [OT] Managing errata lists?

I'm now finishing a book (written in DocBook) and like to thank the
helpful people here.  Especially the list archive and Norms styles
have helped me a lot in tweaking all the tools.  I should find some
time to discuss some experiances I had here, but nothing major.

Now to my question:  Is anybody aware of tools for managing errata
lists?  I like what Jeffrey Friedl had done for his book here:
http://public.yahoo.com/~jfriedl/regex/errata.html 
I'll ask him what tools he uses.

Doing that myself with XML/XSL does not seem to hard, but maybe
someone has something similar to start with - a google search was not
really helpful (most hits were "errata for XML standards").

Jochen

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