Problem Creating PDF from XML Book (Stylesheet?)

Hi All,

I'm working on Ubuntu 10.04 (x64). I installed the FOP package, and
now trying to create a PDF from O'Reilly's DocBook sample at
https://prod.oreilly.com/external/tools/docbook/docs/authoring/docbook_source/.

$oreilly-handbook$ xalan -xml book.xml -pdf book.pdf

results in an exception:

oreilly-handbook$ xalan -in book.xml
XSLT Error: Failed to process stylesheet. (line -1, column -1.)

XSLException Type is: XSLTProcessorException
Message is: Failed to process stylesheet. (Unknown URI, line -1, column -1)
oreilly-handbook$

I believe i need to add `-xsl <stylesheet>`. But I don't know what the
default stylesheet is.

Would anyone be able to point out the default PDF stylesheet?
And how does one specify a PDF output? I haven't gotten far enough to
know what the default output is? There is -text and -html, but I did
not see -pdf.

Thanks in advance,
Jeff