Re: [xsl] Replacing = with == and ===

["Ihe Onwuka ihe.onwuka@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

On Mon, Aug 4, 2014 at 12:11 PM, Michael Kay mike@xxxxxxxxxxxx <
xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:

> >
> > Question:
> >
> > Why does it seem xslt is favorite over xQuery?
> >
>
> You might get different answers on a different list.... But I do think
> it's true that XSLT continues to have much wider usage than XQuery.
>
> I think the reason for that is primarily that people want to do
> transformation (which retains most of the information in a document, but in
> different form) rather than query (which extracts small amounts of
> information from a document).
>
> Although XQuery is capable of doing transformation, XSLT is better at it
> for two reasons:
>
> (a) the built-in rule-based processing model using template rules
>
> (b) the customization capability provided by xsl:import
>
> neither of which have any parallel in XQuery.


> XQuery is much better at doing complex joins, but that's not the kind of
> processing people are mostly doing.
>
>
I like XSLT for outer joins and variants thereof using something that
XQuery doesn't have xsl:key

<xsl:key name="mykey" match="movie" use="@title"/>
<xsl:variable name="doc2" select="doc(doc2.xml)"/>

<xsl:template match="movie[key('mykey',@title,$doc2)"/>
<xsl:template match="movie">
    ....process unmatched movies
</xsl:template>