At 2004-01-23 02:04 -0500, Saverio Perugini wrote:
How best is the following text extracted
from the following xml, possibly using keys
or some other xslt constructs?
...
The basic approach involves:
Gee, that sounds like a good approach to me:
- using keys to get a unique list of possible values for the @category
attribute
<xsl:key name="cats" match="*[(_at_)category]" use="@category"/>
- iterating over these values
<xsl:for-each select="//*[(_at_)category]
[generate-id(.)=generate-id(key('cats',@category)[1])]">
- printing each followed by a colon
<xsl:value-of select="@category"/>: <xsl:text/>
- getting a unique list of all xml element names which contain
this particular attribute value
- iterating over these values
<xsl:for-each select="key('cats',@category)">
<xsl:if test="generate-id(.)=
generate-id(key('cats',@category)[name(.)=name(current())][1])">
printing each
<xsl:value-of select="name(.)"/>
printing an endline
<xsl:text>
</xsl:text>
Many thanks
For what? You already understand the solution! :{)}
...................... Ken
p.s. you have a typo in your XML data, unless you like peepers on your pizza
t:\ftemp>type saverio.xml
<db>
<large category="size">
<thin category="crust">
<olives category="topping"/>
<pepperoni category="topping"/>
</thin>
<pan category="crust">
<pepperoni category="topping"/>
</pan>
</large>
<medium category="size">
<pan category="crust">
<pepperoni category="topping"/>
<olives category="topping"/>
<peppers category="topping"/>
</pan>
</medium>
<small category="size">
<thin category="crust">
<olives category="topping"/>
<pepperoni category="topping"/>
<peepers category="topping"/>
</thin>
<pan category="crust">
<pepperoni category="topping"/>
<olives category="topping"/>
<peepers category="topping"/>
</pan>
</small>
</db>
t:\ftemp>type saverio.xsl
<?xml version="1.0" encoding="iso-8859-1"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
version="1.0">
<xsl:output method="text"/>
<xsl:key name="cats" match="*[(_at_)category]" use="@category"/>
<xsl:template match="/">
<xsl:for-each select="//*[(_at_)category]
[generate-id(.)=generate-id(key('cats',@category)[1])]">
<xsl:value-of select="@category"/>: <xsl:text/>
<xsl:for-each select="key('cats',@category)">
<xsl:if test="generate-id(.)=
generate-id(key('cats',@category)[name(.)=name(current())][1])">
<xsl:if test="generate-id(.)!=
generate-id(key('cats',@category)[1])">, </xsl:if>
<xsl:value-of select="name(.)"/>
</xsl:if>
</xsl:for-each>
<xsl:text>
</xsl:text>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
t:\ftemp>saxon saverio.xml saverio.xsl
size: large, medium, small
crust: thin, pan
topping: olives, pepperoni, peppers, peepers
t:\ftemp>
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