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RE: Variable containing unique values

Subject: RE: Variable containing unique values
From: "Hesselberth, Jan" <Jan.Hesselberth@xxxxxxxxxxxxxxxxxx>
Date: Wed, 21 May 2008 15:37:48 +0100
RE:  Variable containing unique values
Michael,
I've got to use xslt 1.0. I was trying to adapt your examples for
cities. I thought the variable looked easier than the Muenchian
grouping.
Either way I'm not sure how to reference the 'preceding?' rolloverDate.
Regards
Jan

-----Original Message-----
From: Michael Kay [mailto:mike@xxxxxxxxxxxx]
Sent: 21 May 2008 15:33
To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
Subject: RE:  Variable containing unique values


I don't know where you've been looking, but this code doesn't make sense
at
all. Sorting a sequence is never going to reduce the number of items in
the
sequence. (And the path expression used in xsl:sort should almost never
begin with "/", because that would typically mean that every item has
the
same sort key - or in your case, no sort key at all).

First decide whether you're using XSLT 1.0 or 2.0. This kind of thing is
MUCH easier in 2.0.

In XSLT 2.0, use xsl:for-each-group.

In XSLT 1.0, use Muenchian grouping, described at
http://www.jenitennison.com/xslt/grouping

Michael Kay
http://www.saxonica.com/

> -----Original Message-----
> From: Hesselberth, Jan [mailto:Jan.Hesselberth@xxxxxxxxxxxxxxxxxx]
> Sent: 21 May 2008 15:00
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject:  Variable containing unique values
>
> I've read the book and looked at the examples but I can't
> manage to create a variable containing unique values for my
> xml. All I get is a list of all values.
> I need a variable containing unique values for rolloverDate.
> I've tried all sorts of rules for testing for current
> rolloverDate not being equal to previous rollover dates but I
> can't get it to work.
> Can you help please.
> Regards
> 	Jan Hesselberth
>
> The code I have is
>
> 	<xsl:variable name="unique-dates">
> 		<xsl:for-each
> 		select
> ="REPORT/Rollover/RolloverForecast/summaryAccount/element">
> 			<xsl:sort
> select="/rolloverDate[not(preceding::rolloverDate= current())]"/>
> 		<xsl:copy-of select="."/>
> 		</xsl:for-each>
> 	</xsl:variable>
>
> The xml snippet looks like
>
> <summaryAccount id="12345">
> 	<isAutomatedRollover>N</isAutomatedRollover>
> 	<element id="1">
> 		<rolloverDate>2008-04-04</rolloverDate>
> 	</element>
> 	<element id="2">
> 		<rolloverDate>2008-04-04</rolloverDate>
> 	</element>
> </summaryAccount>
> <summaryAccount id="12346">
> 	<isAutomatedRollover>Y</isAutomatedRollover>
> 	<element id="1">
> 		<rolloverDate>2008-04-22</rolloverDate>
> 	</element>
> </summaryAccount>
> <summaryAccount id="12347">
> 	<isAutomatedRollover>Y</isAutomatedRollover>
> 	<element id="1">
> 		<rolloverDate>2008-04-22</rolloverDate>
> 	</element>
> 	<element id="2">
> 		<rolloverDate>2008-04-17</rolloverDate>
> 	</element>
> </summaryAccount>
>
>
>
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LEGAL NOTICE


The information contained in this e-mail and any attachments are private and
confidential.
This message is solely intended for a particular recipient, if you are not the
intended
recipient you are prohibited from storing, copying, disseminating or using the
information
in any way.  If you received this e-mail in error please notify the sender
immediately.
E-mail transmission cannot be guaranteed to be secure or error-free as
information could
be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or
contain viruses.
The sender therefore does not accept liability for any errors, viruses or
omissions in the
contents of this message, which arise as a result of transmission. This e-mail
is not
intended to create legally binding commitments on behalf of Northern Rock plc,
nor do its
contents reflect the corporate views or policies of Northern Rock plc.

Northern Rock plc,
Registered Office Northern Rock House Gosforth Newcastle upon Tyne NE3 4PL.
Registered in England, number 3273685. Telephone No: 0191 2857191

Northern Rock plc is authorised and regulated by the Financial Services
Authority for
deposit-taking; advising on and arranging mortgages and general insurance; and
for
introducing life assurance and investments.

______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please visit http://www.messagelabs.com/email
______________________________________________________________________

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