[xsl] Counting items related by a linked list

Subject: [xsl] Counting items related by a linked list
From: "Joe K" <anotherquestion@xxxxxxxxxxx>
Date: Mon, 22 Mar 2004 21:17:01 -0800
I have the following type of xml document:
Note:
1) All IDs are unique and can be any positive number
2) The link pairs below can link any item to any different Item.
3) CItems are always in the "Target" portion of the link table.
4) No item can be linked more than once to another item.

The question: I would like to define a variable such that given the CItem ID, say 1003, I can get a count of all the AItems linked to it.

<TopLevel>

<AItem>
  <ID=1/>
  <Name=/>
</AItem>
<AItem>
  <ID=2/>
  <Name=/>
</AItem>
<AItem>
  <ID=3/>
  <Name=/>
</AItem>
<AItem>
  <ID=4/>
  <Name=/>
</AItem>
<AItem>
  <ID=5/>
  <Name=/>
</AItem>

<BItem>
  <ID=101/>
  <Name=/>
</BItem>
<BItem>
  <ID=102/>
  <Name=/>
</BItem>
<BItem>
  <ID=103/>
  <Name=/>
</BItem>
<BItem>
  <ID=104/>
  <Name=/>
</BItem>
<BItem>
  <ID=105/>
  <Name=/>
</BItem>
<BItem>
  <ID=106/>
  <Name=/>
</BItem>

<CItem>
  <ID=1001/>
  <Name=/>
</CItem>
<CItem>
  <ID=1002/>
  <Name=/>
</CItem>
<CItem>
  <ID=1003/>
  <Name=/>
</CItem>
<CItem>
  <ID=1004/>
  <Name=/>
</CItem>
<CItem>
  <ID=1005/>
  <Name=/>
</CItem>
<CItem>
  <ID=1006/>
  <Name=/>
</CItem>
<CItem>
  <ID=1007/>
  <Name=/>
</CItem>


<LinkItem> <SourceID>4</SourceID> <TargetID>1003</TargetID> </LinkItem> <LinkItem> <SourceID>6</SourceID> <TargetID>1003</TargetID> </LinkItem> <LinkItem> <SourceID>105</SourceID> <TargetID>1002</TargetID> </LinkItem> <LinkItem> <SourceID>3</SourceID> <TargetID>101</TargetID> </LinkItem> <LinkItem> <SourceID>4</SourceID> <TargetID>1003</TargetID> </LinkItem> <LinkItem> <SourceID>102</SourceID> <TargetID>1</TargetID> </LinkItem> <LinkItem> <SourceID>101</SourceID> <TargetID>1003</TargetID> </LinkItem>

</TopLevel>

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