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Re: [xsl] Rebuild an element without copying defaulted attributes?


Subject: Re: [xsl] Rebuild an element without copying defaulted attributes?
From: "Dan Vint dvint@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Tue, 12 Aug 2014 19:24:17 -0000

Thanks. Guess I should have indicated I'm looking for a generalized solution
so I didn't have to search the DTD for all defaulted vaules. I just happened
to catch xml:space as I had a different problem that I fixed.


Sent on a Sprint Samsung Galaxy NoteB. II

<div>-------- Original message --------</div><div>From: "Lizzi, Vincent"
<Vincent.Lizzi@xxxxxxxxxxxxxxxxxxxx> </div><div>Date:08/12/2014  10:29 AM
(GMT-08:00) </div><div>To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx </div><div>Cc:
dvint@xxxxxxxxx </div><div>Subject: RE: [xsl] Rebuild an element without
copying defaulted attributes? </div><div>
</div>A template that removes xml:space will probably do what you describe.
For example:

    <xsl:template match="node() | @*">
        <xsl:copy><xsl:apply-templates select="@* | node()"/></xsl:copy>
    </xsl:template>

    <xsl:template match="@xml:space[string() = 'preserve' and parent::pre]"/>

The qualification here is to ensure that @xml:space is only removed from the
pre element when the default value is used, so non-default or instances of
xml:space on other elements will pass through.

This could be rewritten as a template matching element pre that copies
everything except @xml:space. For example:

    <xsl:template match="pre">
        <xsl:copy>
            <xsl:copy-of select="@*[not(name() = 'xml:space' and string() =
'preserve')]"/>
            <xsl:apply-templates/>
        </xsl:copy>
    </xsl:template>


You might find other unintended changes such as other default or fixed
attributes, and expansion of entities. Often such changes are not a concern,
or can be controlled by using the output serialization options in XSLT and
templates to filter attributes that have default values. In situations where
unintended changes are not allowed I've found that VTD-XML works well.

Hope this helps,

Vincent


-----Original Message-----
From: dvint@xxxxxxxxx [mailto:xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx]
Sent: Tuesday, August 12, 2014 12:23 PM
To: xsl
Subject: [xsl] Rebuild an element without copying defaulted attributes?

I have a situation where I need to process 4,000 DITA topics to update them.
I'm making updates which will then be included in the production data going
forward. I need to modify certain elements and pass others through unchanged.

My problem is the unchanged.

So there is an element <pre> that has a defaulted @xml:space set to preserve.
When I rebuild this element and recreate all the existing attributes my output
now has a hard coded attribute setting.

So

    <pre ixia_locid="7">there's also the Duplicate Supplier Taxpayer ID Number
Report</pre>

became

<pre ixia_locid="7" xml:space="preserve">there's also the Duplicate Supplier
Taxpayer ID Number Report</pre>

It seems like the only way I can avoid getting the defaulted attributes copied
is to remove the reference to the DTD in all the topics. Is there any other
way to accomplish this?

Currently I'm using this template:

<xsl:template match="*">
<xsl:element name="{name(.)}">
<xsl:for-each select="@*">
    <xsl:attribute name="{name(current())}" ><xsl:value-of
select="."/></xsl:attribute> </xsl:for-each> <xsl:apply-templates/>
</xsl:element> </xsl:template>


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