Re: one key or a whole bunch?

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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