Subject: Re: [xsl] default xsl files? From: Robert Koberg <rob@xxxxxxxxxx> Date: Wed, 10 Oct 2007 19:55:44 -0400 |
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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