Re: [docbook] How can I render an element twice without duplicating the ID?

["Bob Stayton" <bobs@sagehill.net>]

As you discovered, when an element has a id generated for it, it is always the same 
id.  That's an important feature that allows tables of contents to work, since the 
same element must be processed in two modes and the link must match.

I see you tried to use xsl:copy-of, but I'm not clear on how you are using it.  The 
problem with xsl:copy-of is that it copies everything, including the id attribute. 
Instead, you could try using something more like an identity template with a twist, 
the twist being to omit any id attributes.  Something like this:

<xsl:template match="*" mode="copy.mode">
  <xsl:copy>
    <xsl:copy-of select="@*[local-name() != 'id']">
    <xsl:apply-templates mode="copy.mode"/>
  </xsl:copy>
</xsl:template>

This should filter out the id attributes on the copy.

Bob Stayton
Sagehill Enterprises
bobs@sagehill.net


----- Original Message ----- 
From: "Brad Smith" <usernamenumber@gmail.com>
To: <docbook@lists.oasis-open.org>
Sent: Thursday, April 15, 2010 1:47 PM
Subject: [docbook] How can I render an element twice without duplicating the ID?


> Hello all,
>
> I am working on stylesheets for a book that will have Q/As and
> task-descriptions in it. I want to display the <qandaentry>s without
> <answer>s, and the task <step>s without <example>s by default, then
> reprint each element in its entirety (ie with answers and examples) in
> an appendix at the end.
>
> The approach I'm taking is to override the templates for qandaentry
> and step so that they omit the "answer" elements by default, then
> create mode="answers-section" templates for them that do include the
> answers, and call those at the end of the book template.
>
> The problem I am encountering is that the default fo output
> stylesheets, upon which I'm basing mine, add id elements to nearly
> everything, it seems, and generate-id() always seems to generate the
> same value when run against the same element, even if it's being run a
> second time. I've even tried using <xsl:copy-of> to avoid duplicating
> IDs, and so far no luck (though I might just not be using it right
> yet), and since fop dies if there are two elements with the same ID,
> building a pdf fails.
>
> So, I my questions are:
> 1) Is this a sane way to go about what I want to accomplish?
> 2a) If so, how can I avoid getting duplicate IDs?
> 2b) If not, suggestions?
>
> Thanks!
> --Brad
>
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