[xsl] Re: preceding-sibling after sort gives unexpected result

["Dimitre Novatchev" <dnovatchev@xxxxxxxxx>]

"Kaine Varley" <kaine.varley@xxxxxxxxxxxx> wrote in message
news:D95333E1DFE4D511B30500065B39139B49B472@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Hi,
>
> I am trying to process a document similar to the one below, using the
> stylesheet below. My problem is that after I have performed the sort, I
> appear to get the preceding sibling in the original document order rather
> than in the newly sorted order.

This problem can be corrected if you improve your understanding of XSLT and
node-sets, document order and how xsl:sort works in particular.

>
> Looking at the results, you can see that for result number 4, I was hoping
> to get (a) as my preceding sibling, and not (c), which was the original
> document order.
>
> This is an unexpected result, and not at all what I was hoping for. Is
this
> supposed to happen

Yes.

>, or is this just a quirk of MSXML?

No.

>
>
> Kaine
>
>
> Source XML:
> -----------
> <root>
> <parent>
> <child name="a">40</child>
> <child name="b">60</child>
> <child name="c">50</child>
> <child name="d">30</child>
> <child name="e">20</child>
> </parent>
> </root>
>
>
> Stylesheet:
> -----------
> <xsl:template match="root">
> <results>
> <xsl:apply-templates select="parent"/>
> </results>
> </xsl:template>
>
>
> <xsl:template match="parent">
> <xsl:apply-templates select="child">
> <xsl:sort select="." data-type="number" order="descending"/>
> </xsl:apply-templates>
> </xsl:template>
>
>
> <xsl:template match="child">
> <result number="{position()}">
> <current-child-name>
> <xsl:value-of select="@name"/>
> </current-child-name>
> <current-child-value>
> <xsl:value-of select="."/>
> </current-child-value>
> <preceding-sibling-name>
> <xsl:value-of
> select="preceding-sibling::child[1]/@name"/>
> </preceding-sibling-name>
> </result>
> </xsl:template>
>
>
> Result:
> -------
> <results>
> <result number="1">
> <current-child-name>b</current-child-name>
> <current-child-value>60</current-child-value>
> <preceding-sibling-name>a</preceding-sibling-name>
> </result>
> <result number="2">
> <current-child-name>c</current-child-name>
> <current-child-value>50</current-child-value>
> <preceding-sibling-name>b</preceding-sibling-name>
> </result>
> <result number="3">
> <current-child-name>a</current-child-name>
> <current-child-value>40</current-child-value>
> <preceding-sibling-name/>
> </result>
> <result number="4">
> <current-child-name>d</current-child-name>
> <current-child-value>30</current-child-value>
> <preceding-sibling-name>c</preceding-sibling-name>
> </result>
> <result number="5">
> <current-child-name>e</current-child-name>
> <current-child-value>20</current-child-value>
> <preceding-sibling-name>d</preceding-sibling-name>
> </result>
> </results>
>
>
> Post sort:
> ----------
> <root>
> <parent>
> <child name="b">60</child>
> <child name="c">50</child>
> <child name="a">40</child>
> <child name="d">30</child>
> <child name="e">20</child>
> </parent>
> </root>
>
>
> My system:
> ----------
> XP Professional
> IE6 SP2
> MSXML4 SP2
>
>
> SNIP
>
>
>
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