Thanks for the replies, I get it now.  I was exploring this option:

            <xsl:attribute name="xsl:use-attribute-sets">
                <xsl:if test="position() mod 2 = 0">
                    <xsl:text>alt-</xsl:text>
                </xsl:if>
                <xsl:text>table-row-background</xsl:text>
            </xsl:attribute>

..but quickly realize that the attribute-sets are (in simple terms)
resolved on load of the stylesheet, rather, applied to the stylesheet
so the above is out of context again.  I think I have that correct.

Ken, the attribute sets for me are still valid, and the alternate row
style is a no biggy, I can deal with that.  I was previously calling
templates which i prefaced them as "typical" for example
"typical.background-grey", so familiar with this approach.

Thanks,
Karl..



On Mon, Jun 1, 2009 at 1:01 PM, Michael Kay <mike@s...> wrote:
>>
>> Am I doing something wrong because this is not working:
>>
>>         <fo:table-row hyphenate="true">
>>             <xsl:if test="position() mod 2 = 0">
>>                 <xsl:attribute
>> name="xsl:use-attribute-sets">background-gray</xsl:attribute>
>>             </xsl:if>
>>
>> Is that the correct way to call an attribute set conditionally?
>
> No. Guessing at syntax isn't a good way of finding out what the spec allows
> - and this particular guess is miles off.
>
> Attribute sets are only useful if you know statically which attributes you
> want to add. Usually you're likely to know statically what the attribute
> values will be as well - though the value can in fact depend on the context
> node or on global variables.
>
> Regards,
>
> Michael Kay
> http://www.saxonica.com/
> http://twitter.com/michaelhkay
>
>
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