In my experience xmllint is not the best tool to validate your Docbook content. A file that validated with xmllint showed several serious errors when validated with jing.
I'm not aware of a better validation tool for older XML 4, other people may be more familiar with that subject. But I wouldn't be so quick to point the stylesheets as the problem based solely on xmllint's feedback.
Carlos
Sent from my iPad
On Nov 29, 2012, at 1:03 AM, Michael Wiedmann <> wrote:
> Given a "legacy" DocBook 4.3 file, quite large (approx. 640 KB, composed
> out of several XML files using XInclude).
>
> This source file validates w/o any errors/warnings using xmllint.
>
> Trying to generate XHTML with the DocBook XSL stylesheets V1.77.1
> (*no* customization used, using xsltproc) shows some messages like:
>
> Request for title of element with no title: literal
>
> (see common/titles.xsl "title.markup")
>
> I looked all over the file, checking every <literal> element
> but could not find any markup error (as well as xmllint!).
>
> Any hints how to further track down the (possible) markup errors?
>
> Michael
>
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