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Re: [xsl] sequence numbering.


Subject: Re: [xsl] sequence numbering.
From: Chuck Paussa <cpaussa@xxxxxxxxx>
Date: Tue, 02 Apr 2002 12:23:12 -0800

william,

Your problem comes from calling the key from within the node processing on the sorted node-set.

(Apparently the key is not available from within that node-set? Anyone? I read once something about it being a different document space)

You create a sorted node-set, $sorted-color, and then try to access the key from within the processing for that node-set
<xsl:for-each select="xalan:nodeset($sorted-color)/product">
<xsl:value-of select="key('color',this_color)"/>
</xsl:for-each>


Instead you should do
<xsl:for-each select="/products/product">
<xsl:sort select="./color" data-type="text" order="descending"/>
   <xsl:value-of select="key('color',this_color)"/>
</xsl:for-each>

Chuck Paussa

william locksman wrote:

Hi ,
Thanks very much to Jeni for sorting my probs out..
That was really very helpful.
How ever there is one more problem that popped out.
Here it goes..
The xml file..
<products>
<product id = "1">
<name>product1</name>
<weight>56</weight>
<color>11</color>
</product>
<product id = "2">
<name>product2</name>
<weight>56</weight>
<color>11</color>
</product>
<product id = "3">
<name>product3</name>
<weight>56</weight>
<color>11</color>
</product>
<product id = "4">
<name>product4</name>
<weight>56</weight>
<color>12</color>
</product>
<product id = "5">
<name>product5</name>
<weight>56</weight>
<color>12</color>
</product>
<colorlist>
<color id = "11">
<name>red</name>
</color>
<color id = "12">
<name>blue</name>
</color>
</colorlist>
</products>
Here i was adviced by Jenni to sort the colors and store it in Variable.. and then use the <xalan:nodeset > for processing.
in doing so when i try to use the <xsl:key>, it does not seem to give me the desired result.
i am pasting below the xsl..
<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:xalan = "http://xml.apache.org/xalan" exclude-result-prefixes="xalan">
<xsl:output omit-xml-declaration="yes" method="text"/>
<xsl:key name = "color" match = "//colorlist/color" use = "@id"/>
<xsl:template match="/">
<xsl:variable name="sorted-color">
<xsl:for-each select="//product">
<xsl:sort select="./color" data-type="text" order="descending"/>
<xsl:copy-of select="."/>
</xsl:for-each>
</xsl:variable>
<xsl:for-each select="xalan:nodeset($sorted-color)/product">
<xsl:variable name="this_color" select="./color"/>
<xsl:number count="product[color=$this_color]"/><xsl:value-of select="this_color"/>
<xsl:value-of select="key('color',this_color)"/>
<xsl:text>&#xa;</xsl:text>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>


I was expecting a result that would look like
1 blue
2 blue
1 red
2 red
3 red
but the key function is not returning any text..
and the result is
1
2
1
2
3
Am i wrong in my XSL or is there any thing i am missing out and which i am unaware of??
thanks
william


Hi William,

> about the name space,
> The Declartion i am using is
>
> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
> xmlns:xalan="http://xml.apache.org/xslt"
> xmlns:redirect="org.apache.xalan.xslt.extensions.Redirect"
> extension-element-prefixes="redirect"
>              version="1.0">
>
> and i am using XALAN processor

OK, then you should be able to use xalan:nodeset() extension function
(see http://xml.apache.org/xalan-j/extensionslib.html#nodeset).

[It seems likely that the next version of Xalan will support EXSLT
functions. See the recent mail from Don Leslie
(http://aspn.activestate.com/ASPN/Mail/Message/exslt/1083089). With
that version, you'll be able to use the namespace
http://exslt.org/common, and the function exsl:node-set(), which would
make your stylesheet portable across a range of processors, including
Saxon, libxslt, 4XSLT and jd.xslt.]

Cheers,

Jeni

---
Jeni Tennison
http://www.jenitennison.com/


XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list




On Wed, 27 Mar 2002 william locksman wrote :

Hi the solution Michael Suggested seems to fit my purpose, But Since i am a newbie to XSL , I do not know how to form a temporary tree that contains sorted sequence.
Michael's explaination made me pretty much clear of what has to be done. But i do not know how it has to be done.
If any one can please suggest me how to go about doing it or give me a link to any reference document, It should be of much help to me
Thanks
William


On Tue, 26 Mar 2002 Michael Kay wrote :

<xsl:number> gives you the position of the element in the source tree, not
in the sorted sequence. To get the number in the sorted sequence, do a
two-phase transformation: create a temporary tree that contains the sorted
products, then process this (using xx:node-set()) to add the numbers. To get
the number for a product among all the products of the same colour, use
<xsl:number count="product[color=$this_color]"/>


Michael Kay
Software AG
home: Michael.H.Kay@xxxxxxxxxxxx
work: Michael.Kay@xxxxxxxxxxxxxx

> -----Original Message-----
> From: owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> [mailto:owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx]On Behalf Of william
> locksman
> Sent: 26 March 2002 16:34
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: [xsl] sequence numbering
>
>
> <products>
>   <product id = "1">
>   <name>product1</name>
>    <weight>56</weight>
>    <color>blue</color>
>   </product>
>   <product id = "2">
>    <name>product2</name>
>    <weight>56</weight>
>    <color>red</color>
>   </product>
>   <product id = "3">
>   <name>product3</name>
>    <weight>56</weight>
>    <color>red</color>
>   </product>
>   <product id = "4">
>   <name>product4</name>
>    <weight>56</weight>
>    <color>blue</color>
>   </product>
>   <product id = "5">
>    <name>product5</name>
>    <weight>56</weight>
>    <color>blue</color>
>   </product>
> </products>
>
> for the above xml for all the color elements in the xml file,
> get the products.. in other words group the products based on
> there colors
> and then assosiate the products with a serial num . This serial id
> is
> in the series of 1,2,3... 1 for the first product that is of a
> perticular color, 2 for the next product and so on..
>
> xsl i wrote..
>
> <?xml version="1.0"?>
> <xsl:stylesheet version="1.0"
> xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
> <xsl:template match="/">
> <xsl:for-each select="//product/color">
> <xsl:sort select="." data-type="text" order="descending"/>
> <xsl:number format="1" count="product"/> ...<xsl:value-of
> select="."/>..<xsl:value-of select="../name"/>
> <br></br>
> </xsl:for-each>
> </xsl:template>
> </xsl:stylesheet>
>
> with above xsl , I am getting an out put
>
> 3 ...red..product3
>
> 2 ...red..product2
>
> 5 ...blue..product5
>
> 4 ...blue..product4
>
> 1 ...blue..product1
>
> which is quite understandable... But i wanted the output which
> should look like
>
> 1 ...red..product3
>
> 2 ...red..product2
>
> 1 ...blue..product5
>
> 2 ...blue..product4
>
> 3 ...blue..product1
>
> that is for each of the colors of the same type i need the
> sequence number to start from 1
>
> any suggestions and ideas will be most appreciated and helpful
> many thanks in advance
> bill..
>
>
>  XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list
>


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