Ok so this is a few weeks over old.
Assuming that a product node is current, I'd use:
count(preceding-sibling::product[(_at_)id=current()/@id])
That is, I took the following XML:
<products>
<product id="A"/>
<product id="B"/>
<product id="C"/>
<product id="B"/>
<product id="B"/>
<product id="D"/>
<product id="E"/>
</products>
And applied the following transform (essentially the identity transform
with this calculation added to the product)
<?xml version="1.0"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
<xsl:template match="node()|@*">
<xsl:copy>
<xsl:apply-templates select="*|@*"/>
</xsl:copy>
</xsl:template>
<xsl:template match="product">
<xsl:copy>
<xsl:attribute name="previous_same_id_count">
<xsl:value-of
select="count(preceding-sibling::product[(_at_)id=current()/@id])"/>
</xsl:attribute>
<xsl:apply-templates select="*|@*"/>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>
And got the following result (running from within Stylus Studio)
<?xml version='1.0' ?>
<products>
<product id="A" previous_same_id_count="0"/>
<product id="B" previous_same_id_count="0"/>
<product id="C" previous_same_id_count="0"/>
<product id="B" previous_same_id_count="1"/>
<product id="B" previous_same_id_count="2"/>
<product id="D" previous_same_id_count="0"/>
<product id="E" previous_same_id_count="0"/>
</products>
Which should be the thing you are looking for.
Adam
-----Original Message-----
From: owner-xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
[mailto:owner-xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com] On Behalf Of
Martin Kupisch
Sent: November 7, 2002 3:11 AM
To: XSL-List(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: [xsl] Filter nodelist
Hello everyone,
I have an XML document that contains a few 'product' elements
with 'id' attributes. Because I have to operate on these
products a few times I build a variable that just takes all
products with the expression 'descendant::product'. Sometimes
I have to iterate over all products. But that is not all I do
with the list. My problem: I have to get the count of all
products from this node-list that have the same id like a
certain product in the list and that's position in the
node-list is lower. Example:
[product id="A",
product id="B",
product id="C",
product id="B",
product id="B", <-
product id="D",
product id="E"]
So if I have the product at position 5 the result of the
count should be 2, because of the products at position 2 and
4 with the same id.
Any ideas? Thanks.
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