Re: [xsl] copy attributes modifying their values, regardless of their names

[Michael Kay <mike@xxxxxxxxxxxx>]

Well, firstly, "attribute value templates" are things you find in a 
stylesheet, not in a source document. But let's assume you mean 
"attribute values containing "{".

I would have thought the cleanest approach was

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

<xsl:template match="@*[contains(., '{')]">
<xsl:attribute name="{name()}">
<xsl:value-of select="......."/>
</xsl:attribute>
</xsl:template>

Michael Kay
Saxonica

On 04/12/2010 07:45, TW wrote:
> Hi all,
>
> I'm generating XSL stylesheets using XSL.  One thing I want to do is
> modify all attribute value templates found in the source document.  I
> thought something like this would do the job:
>
> <stylesheet version="1.0" xmlns="http://www.w3.org/1999/XSL/Transform";>
>    <template name="modify-attribute-value-templates">
>      Create replacement value
>    </template>
>
>    <template match="*">
>      <copy>
>        <for-each select="@*">
>          <copy>
>            <call-template name="modify-attribute-value-templates"/>
>          </copy>
>        </for-each>
>        <apply-templates/>
>      </copy>
>    </template>
> </stylesheet>
>
> But much to my chagrin I realized that<copy>  already copies the value
> if applied to attributes.  A workaround could be a long choose element
> like this:
>
>    <template match="*">
>      <copy>
>        <for-each select="@*">
>          <choose>
>            <when test="not(contains(string(),'{'))">
>              <copy/>
>            </when>
>            <when test="local-name()='att1'">
>              <attribute name="att1">
>                <call-template name="modify-attribute-value-templates"/>
>              </attribute>
>            </when>
>            <when test="local-name()='att2'">
>              <attribute name="att2">
>                <call-template name="modify-attribute-value-templates"/>
>              </attribute>
>            </when>
>            <!-- a ton of more attributes -->
>            <otherwise>
>              <message terminate="yes">
>                The attribute value template found in attribute
>                <value-of select="local-name()"/>
>                isn't handled by the stylesheet.
>              </message>
>            </otherwise>
>          </choose>
>        </for-each>
>        <apply-templates/>
>      </copy>
>    </template>
>
> There might be an awful lot of attributes that have to be handled.  If
> I don't know what attributes are to be found in the source document,
> then I I'll have to add another step to the process, creating the
> above choose statement using another stylesheet.
>
> I refuse to believe that something I thought would be done in three
> lines turns out to require thousands of lines for case differentiation
> and potentially an additional step in the process.  Can anyone help?
>
> Thomas W.