On Wed, 2007-10-10 at 16:35 -0700, Anthony Ettinger wrote:
I'm using docbook, and I have read up about PUBLIC identifiers, and
the /etc/xml/catalog file pointing to local DTDs.
I want to have the same basic functionality with xsl
files...basically, the docbook xsl files are in or around the same
path: /usr/share/xml/.../docbook/stylesheets/
however this path may change...depending on the box.
Any idea how I can dynamically (at the OS level) provide the XSL file
to use from within my script?
What I do (in a java/jaxp realm) is provide a 'fallback' URIResolver. A
URIResolver is a very simple interface to implement. You can set the
resolver on your TransformerFactory (to resolve xsl:import/xsl:include)
and on the Transformer (to resolve document function calls).
I construct it by passing a fallback directory. Then when the jaxp
transformation hits a xsl:import, xsl:include or document function call,
it goes to the resolver's 'resolve' method. This is automatically passed
two parameters:
href - An href attribute, which may be relative or absolute.
base - The base URI against which the first argument will be made
absolute if the absolute URI is required. (I don't think I have ever
used this param...)
In the resolve method you can see if the file exists, if not find it in
the fallback location.
best,
-Rob
Also, there may be a case where I need to override a docbook xsl file
but still use the other un-modified versions:
ie:
/my_files/foo.xsl (customized version)
/distro_files/foo.xsl (original version)
/distro_files/bar.xsl (original version)
So for example, if there is a "/my_files/foo.xsl" use that one,
otherwise use the "/distro_files/" versions.
I realize this is may not specifically relate to XSLT (perhaps) but I
do see how it is done with DTDs and XML, just need a similar mechanism
for maintaining my stylesheets.
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