RE: [xsl] Non Existent attribute, and other things.

["Michael Kay" <mhkay@xxxxxxxxxxxx>]

> So I end up doing...
>
> count(@value) = 0 or not(number(@value))

To test if the value is present and non-zero, do boolean(@value!=0)

> could somebody explain what Jeni's suggestion meant when it
> said...
>
> key('Ps', $name)[count(.|$Ps) = count($Ps)]
>
> ...as I really don't understand it.

The predicate [count(.|$Ps) = count($Ps)] is true for any node that is a
member of the node-set $Ps, and false for any one that isn't. Yes, this
syntax really IS awkward!
>
> Finally I thought there was an equivalent to the C ?: notation
> in XSL but I can't seem to find it.

No, there isn't! It's on the requirements list for 2.0

 On several occasions in my
> code I end with the same fragment.
>
> 		<xsl:variable name="shorter">
> 			<xsl:choose>
> 				<xsl:when test="@short">
> 					<xsl:value-of select="@short"/>
> 				</xsl:when>
> 				<xsl:otherwise>
> 					<xsl:value-of select="@name"/>
> 				</xsl:otherwise>
> 			</xsl:choose>
> 		</xsl:variable>
>
If you prefer brevity to readability you can write

concat(@short, substring(@name, 1, not(@short)*100000))

I'll leave you to study the specs to work out why that works!

Mike Kay
Software AG


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