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.
preceding-sibling finds a node's neighbours in the tree that it belongs
to, not its neighbours in the list of nodes that you happen to be
processing at the time.
You can construct a new tree containing copies of the node and (using
xx:node-set()) find the preceding-sibling on this new tree.
Michael Kay
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, or is this just a
quirk of MSXML?
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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