Hi Lars,
You should get that message only when two conditions are
met:
1. You are processing a DocBook 5 document with the
non-namespaced stylesheets.
or
You are single-step profiling by using
profile-docbook.xsl (probably your case).
and
2. You are using xsltproc (which lacks an extension
function to get the name of the current directory).
With either condition in (1), the document is preprocessed
into an internal nodeset (a nodeset held in memory) before being processed by
the stylesheets. The internal nodeset loses all contact with the
filesystem where the files originated, so the preprocessing template tries to
add relative directory references into the internal nodeset by adding xml:base
attributes to preserve the relative locations. It uses an extension
function to get the original base directory of the document, but xsltproc does
not have a function to fetch that information, while Saxon and Xalan
do.
So if you use modular doc and the modules are in various
directories, that directory structure information gets lost in the
internal subset. If your documents don't need such xml:base
attributes, then it has no effect on your output.
You can avoid it by either using Saxon, or by using two-step
profiling.
Bob Stayton
Sagehill Enterprises
From: Lars Vogel
Sent: Tuesday, May 14, 2013 7:13 AM
To: DocBook Apps
Subject: [docbook-apps] WARNING: cannot add @xml:base to node set
root element. Relative paths may not work.
Hello,
since a while I get the following warning during the transformation with
the docbook distribution:
WARNING: cannot add @xml:base to node set root element. Relative
paths may not work.
I'm not sure what triggers this warning, a Google search resulted in hints
about Docbook V5.0 but I'm still using Docbook 4.5.
I'm currently using the docbook-xsl-1.77.1 distribution and I think (but
I'm not sure) that I have this warning since I upgraded from 1.76. The output
looks ok to me, but this warning does not create a warm fussy feeling. ;-)
Any hint how to get rid of this warning?
Best regards, Lars
