Availability of Printable version of documentation

[H.S.]

Derek Atkins wrote:
> 
> It's in the gnucash-docs SVN repo.
> Please feel free to help us with the proper command-line incantation
> to generate a decently-looking PDF.

Some help, somebody?

I grabbed gnucash's help from is svn repo thus:
svn checkout http://svn.gnucash.org/repo/gnucash-docs/trunk gnucash-docs

While trying to convert the sgml help file to pdf using docbook2pdf
command, I am getting these errors (on Debian Testing):
$> docbook2pdf -e no-valid gnucash-help.sgml
Using catalogs: /etc/sgml/catalog
Using stylesheet: /usr/share/docbook-utils/docbook-utils.dsl#print
Working on: /tmp/gnucash-docs/help/C/gnucash-help.sgml
openjade:/usr/share/xml/docbook/schema/dtd/4.1/docbookx.dtd:74:17:E:
"X20AC" is not a function name
openjade:/usr/share/xml/entities/xml-iso-entities-8879.1986/ISOamsa.ent:40:19:E:
"X21B6" is not a function name
openjade:/usr/share/xml/entities/xml-iso-entities-8879.1986/ISOamsa.ent:41:19:E:
"X21B7" is not a function name
openjade:/usr/share/xml/entities/xml-iso-entities-8879.1986/ISOamsa.ent:42:17:E:
"X21D3" is not a function name
openjade:/usr/share/xml/entities/xml-iso-entities-8879.1986/ISOamsa.ent:43:18:E:
"X21CA" is not a function name
openjade:/usr/share/xml/entities/xml-iso-entities-8879.1986/ISOamsa.ent:44:18:E:
"X21C3" is not a function name
openjade:/usr/share/xml/entities/xml-iso-entities-8879.1986/ISOamsa.ent:45:18:E:
"X21C2" is not a function name
.
.
and so on
. .

I have never used sgml or docbook before. So I have no idea what is
going on. Is there something special or custom about Gnucash Help file
that I should be aware of? Can somebody decipher the above messages and
explain what I am missing?

Thanks.

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