Hi Alexey,
This is really a stylesheet glitch.  Only empty biblioentries should trigger a 
lookup in the bibliography database, but that test is insufficient, because it 
uses:

  <xsl:when test="string(.) = ''>

It really should first do an apply-templates into a variable to see if the 
entry has generated content, and then test to see if it is empty.

I think if  you add a blank space to the biblioentry, it should get past that 
test and process the content normally.

Bob Stayton
Sagehill Enterprises
[email protected]


From: Alexey Neyman 
Sent: Saturday, August 31, 2013 11:27 PM
To: [email protected] 
Subject: [docbook-apps] Bibliography vs. olinks


Hi all,



I have a set of documents that cross-reference each other. They also mention 
each other in their bibliography sections.



So, the most natural way I thought of was:



<biblioentry>

<olink targetdoc="some-other-document"/>

</biblioentry>



Indeed, since all the necessary document info is already in the olink database 
- why not use it? Unfortunately, DTD stopped me from doing that. :)



So, I tried to wrap the <olink/> above in <citetitle/>. That passed the 
validation, but the docbook-xsl stylesheets interpreted this as a reference to 
an external bibliography file, and failing to load that external entity, 
emitted an error message:



warning: failed to load external entity 
"http://docbook.sourceforge.net/release/bibliography/bibliography.xml";

No bibliography entry: idp71680 found in 
http://docbook.sourceforge.net/release/bibliography/bibliography.xml



So, I see two possible ways of dealing with this:



- to process the whole set of documents to create that "bibliography 
collection" (which, I guess, would work - but seems to be an overkill, given 
the availability of the required information in the olink database)



OR



- to customize the DTD to allow <olink/> as a direct child of <biblioentry/> 
and to customize the match="biblioentry" template to handle such olinks.



Am I missing some obvious way of dealing with this problem?



If I follow the latter approach, would it be a welcome addition to docbook-xsl 
stylesheets?



Regards,

Alexey.


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