Re: Problems selecting the right nodes.

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Subject: Re: Problems selecting the right nodes.
From: Adam van den Hoven <list@xxxxxxxxxxxxxxxxxxx>
Date: Fri, 26 Sep 2003 10:05:07 -0700

Thanks everyone for your help.

It seems that I made something unclear. The nodeset that I'm working with is a subset of my data. This adds a significant level of complexity to the problem. Micheal's suggestion of testing count(key(...)) != count(/*/branch) is great except that key returns too many elements since it takes in the whole document, not my subset.

This makes things more difficult. What I have, so far comes from Steven's suggestion (You'll notice that I added the region tag to demostrate the filtering):

<xsl:template match="/"> <xsl:variable name="filtered-branches" select="branches/branch[region/@id ='region5']"/> <xsl:variable name="unique-services" select="/branches/branch/service[generate-id(.) = generate-id(key('service',@id))]"/> <xsl:variable name="filtered-unique-services" select="$unique-services[@id = $filtered-branches/service/@id]"/> <xsl:variable name="rtf-selectable-services"> <xsl:apply-templates select="$filtered-unique-services"> <xsl:with-param name="branches" select="$filtered-branches"/> </xsl:apply-templates> </xsl:variable>  <xsl:variable name="selectable-services" select="xalan:nodeset($rtf-selectable-services)/descendant-or-self::service"/>  <xsl:value-of select="count($selectable-services)"/> </xsl:template> <xsl:template match="service" mode="getselectable"> <xsl:param name="branches"/> <xsl:if test="$branches[not(service/@id = current()/@href)]"> <xsl:copy-of select="."/> </xsl:if> </xsl:template>

So this works. However, in my real problem, which this is a simplification of, I have two elements which I need to do this for. So I am beginning to wonder if its better to do this twice, which is a little messy already, or to take my filtered branches, call nodeset on those and then take Michael's suggestion. However, then I have the problem of changing the current node to be my filtered nodeset and keeping that variable around

Any more thoughts?

Adam

Michael Kay wrote:

But this is an O(n^2) solution and doesn't remove the duplicates...

Michael Kay
-----Original Message----- From: owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx [mailto:owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx] On Behalf Of Kienle, Steven C [PGRD/0200] Sent: 25 September 2003 18:01 To: 'xsl-list@xxxxxxxxxxxxxxxxxxxxxx' Subject: RE: Problems selecting the right nodes.

I'm not sure if this will fit the bill, but it does return the correct results with your sample below.
<xsl:template match="service">
   <xsl:if test="/root/branch[not(service/@id = current()/@id)]">
       <xsl:value-of select="@id" />
   </xsl:if>
</xsl:template>
Basically, this matches the service nodes and only executes the value-of when the exists a branch which does not have a service with the same @id as the current service. Because it is processing nodes, it possible that you could have some duplication, which you may not want. You might be able to use this as a starting point.

Steve
-----Original Message-----
From: Adam van den Hoven [mailto:list@xxxxxxxxxxxxxxxxxxx]
I have a nodeset or arbitrary length that contains a set of tags which look something like:
<branch id="br1">
  <service id="service1" />
  <service id="service2" />
  <service id="service3" />
</branch>
<branch id="br2">
   <service id="service1" />
   <service id="service4" />
</branch>
Now what I want is a nodeset that contains (uniquely) all the services that do not occur in all the branches. In this case I want service 2, 3 and 4 but not 1

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Current Thread

Problems selecting the right nodes.
- Adam van den Hoven - Thu, 25 Sep 2003 12:26:49 -0400 (EDT)
  - Michael Kay - Thu, 25 Sep 2003 18:48:23 -0400 (EDT)
  - <Possible follow-ups>
  - Kienle, Steven C [PGRD/0200] - Thu, 25 Sep 2003 13:02:23 -0400 (EDT)
    - Michael Kay - Thu, 25 Sep 2003 18:49:50 -0400 (EDT)
      - Adam van den Hoven - Fri, 26 Sep 2003 13:08:59 -0400 (EDT) <=
      - Michael Kay - Fri, 26 Sep 2003 13:39:04 -0400 (EDT)
  - McNally, David - Thu, 25 Sep 2003 16:21:30 -0400 (EDT)
    - Gloom Factory - Thu, 25 Sep 2003 17:00:33 -0400 (EDT)
    - Gloom Factory - Thu, 25 Sep 2003 17:36:41 -0400 (EDT)

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