RE: [xsl] xslt 2. index-of, nodes

Subject: RE: [xsl] xslt 2. index-of, nodes
From: David.Pawson@xxxxxxxxxxx
Date: Thu, 3 Jul 2003 15:10:18 +0100
Hi Jeni.
> >   That's clearer. I've just been fighting group-by="concat...
> >   which fails :-)
> Oh? It shouldn't fail -- you should be able to do:
>   <xsl:for-each-group select="loc"
>                       group-by="concat(@hl, '+', @side, '+', @pos)">
>     ...
>   </xsl:for-each-group>

I wasn't using the + as a separator. I don't see why that should
make a difference though? 

> The reason that I didn't use it in the example is that (a) using
> concat() is ugly (and string-join() only marginally less so),
> particularly because you have to come up with a suitable separator for
> the values that you want to include in the grouping key and (b) if
> your attributes were typed (e.g. @pos as an xs:integer) then using
> separate <xsl:for-each-group>s gives you datatype-aware grouping,

yes. So that's a no no.

> I would personally prefer something like:
>   <xsl:for-each select="loc">
>     <xsl:group by="@hl" />
>     <xsl:group by="@side" />
>     <xsl:group by="@pos" />
>     ...
>   </xsl:for-each>
> but I've suggested it before and no one else seems to think it's worth
> changing.

I'd go for that on readability grounds.
  None of the others are other than ugly IMO.

No one else as in the WG?

regards DaveP


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