Re: one key or a whole bunch?

Saxon has its own "node-set" extension built-in, so you don't need to use the "exsl" version.

Following is the description of Saxon's "node-set" function from Michael Kay's book:

"This function is a hangover from XSLT 1.0, which does not allow conversion of a tree to a node-set.  It performs the conversion explicitly.  This function is no longer needed because Saxon (following the draft XSLT 1.1 specification) will do the conversion automatically when required."

So if I read this correctly, you may not actually need to explicitly invoke "node-set".

Hope this helps,

Paul


--

On Wed, 22 May 2002 03:30:31  
 Marina Sorreta wrote:
>Hi Jenni,
>
>Many thanks for your help, indeed I was looking for a
>one step
>solution and it was not possible. I have tried to
>implement the
>solution but am having problems with the declaration
>of the
>exsl node set. (I am using Saxon)
>
>I downloaded the exsl zip file and copied
>exsl.node-set.xsl into the
>same directory as the stylesheet. Then I declared it
>as below:-
>
>
><xsl:stylesheet version="1.0"
>xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
>xmlns:exsl="http://www.exslt.org/common"
>extension-element-prefixes="exsl">
><xsl:import href="exsl.node-set.xsl" />  <--- line 5
>
>and I get the error message: -
>
>
>C:\saxon>saxon -o output.txt test.xml shelves.xsl
>Error at xsl:import on line 5 of
>file:/C:/saxon/shelves.xsl:
>  no more input
>Transformation failed: Failed to compile stylesheet. 1
>error detected.
>
>
>So it looks as though I've declared the exsl
>incorrectly. How should it be done?
>
>Thanks again,
>
>Marina
>
>
>--- Jeni Tennison <jeni@xxxxxxxxxxxxxxxx> wrote:
>> Hi Marina,
>> 
>> > I need to get a count of all the groups of
>> <SHELF_NO>'s that are the
>> > same. I need the output to be in the form (with
>> the example above):-
>> >
>> > Shelf Groups   Number of Copies
>> > 0   0 <--i.e. no instance of no shelf number
>> > 1   1 <--i.e. 1 instance of just one unique shelf
>> number
>> > 2   0 <--i.e no instance of two shelf numbers the
>> same
>> > 3   1 <--i.e. 1 instance where three shelf numbers
>> were the same
>> > etc etc
>> 
>> If I understand you properly, that's quite a
>> difficult analysis to do,
>> especially in one step. The best thing to do would
>> be to break it down
>> into two steps:
>> 
>>   - create a list of the unique shelf numbers and
>> the number of
>>     occurrences of each of those shelf numbers
>> 
>>   - use a recursive template to go up through the
>> possible numbers of
>>     repeats, and count how many there are of each.
>> 
>> The first step involves your kShelf key:
>> 
>> <xsl:key name="kShelf" match="SPORTS | LEISURE |
>> CLOTHES | GIFTS"
>>          use="SHELF_NO"/>
>> 
>> To create the node set of unique SHELF_NO elements,
>> you need to use
>> the Muenchian method, as you'd started doing:
>> 
>>   <xsl:variable name="shelves-rtf">
>>     <xsl:for-each select="SHOP/*[generate-id() =
>>                                 
>> generate-id(key('kShelf',
>>                                                 
>> SHELF_NO)[1])]">
>>       <SHELF_NO count="count(key('kShelf',
>> SHELF_NO))">
>>         <xsl:value-of select="SHELF_NO" />
>>       </SHELF_NO>
>>     </xsl:for-each>
>>   </xsl:variable>
>>   <xsl:variable name="shelves"
>> select="exsl:node-set($shelves-rtf)" />
>> 
>> That will give you $shelves, as a node set
>> containing something like:
>> 
>>   <SHELF_NO count="1">4567</SHELF_NO>
>>   <SHELF_NO count="3">3344</SHELF_NO>
>> 
>> You can then pass this node set to a recursive
>> template that steps up
>> from 0 through to however many is required, counting
>> how many SHELF_NO
>> elements have a particular value for their count
>> attribute. The
>> recursive call adds one to the count, and only
>> passes on those
>> SHELF_NO elements that don't have the particular
>> count (gradually
>> working through the list of SHELF_NO elements).
>> Something like:
>> 
>> <xsl:template name="frequency-table">
>>   <xsl:param name="count" select="0" />
>>   <xsl:param name="shelves" select="/.." />
>>   <xsl:if test="$shelves">
>>     <xsl:variable name="shelves-with-count"
>>                   select="$shelves[@count = $count]"
>> />
>>     <xsl:variable name="nshelves-with-count"
>>                  
>> select="count($shelves-with-count)" />
>>     <xsl:value-of select="$count" />
>>     <xsl:text> </xsl:text>
>>     <xsl:value-of select="$nshelves-with-count" />
>>     <xsl:call-template name="frequency-table">
>>       <xsl:with-param name="count" select="$count +
>> 1" />
>>       <xsl:with-param name="shelves"
>>                      
>> select="$shelves[count(.|$shelves-with-count) !=
>>                                       
>> $nshelves-with-count]" />
>>     </xsl:call-template>
>>   </xsl:if>
>> </xsl:template>
>> 
>> Once you'd created the $shelves variable (as above),
>> you could call
>> this template with:
>> 
>>   <xsl:call-template name="frequency-table">
>>     <xsl:with-param name="shelves" select="$shelves"
>> />
>>   </xsl:call-template>
>> 
>> Cheers,
>> 
>> Jeni
>> 
>> ---
>> Jeni Tennison
>> http://www.jenitennison.com/
>> 
>
>
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