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Postnext
Kam ChanSubject: Find the parent who doesn't have a particular child
Author: Kam Chan
Date: 06 Jul 2009 05:28 PM
I have a simple question, hope that you can answer quickly.

I am trying to write a simple function that takes an argument of the name of a child, and look for the parent node that doesn't have this child.

For example"
declare variable $system :=
<root>
<a>
<b>b2</b>
<c>c1</c>
</a>
<a>
<b>b2</b>
<d/>
</a>
</root>;

declare function local:getParentOfNonExistentChild($system as element(), $bValue as xs:string, $childName as xs:string) as element()*
{
$system//*[b/text() = $bValue][not($childName)]
};

<result>
{ local:getParentOfNonExistentChild($system treat as element(), "b2", "d") }
</result>

In this example the function accepts the name of the child. When I pass in "d" as the child name, it should have returned the first <a> parent, but the function always return empty.

This appears to be a variable substitution problem with the $childName.
How should I write this?

Thanks in advance.

Kam
Postnext
Ivan PedruzziSubject: Find the parent who doesn't have a particular child
Author: Ivan Pedruzzi
Date: 07 Jul 2009 02:09 AM

declare function local:getParentOfNonExistentChild(
$system as element(),
$bValue as xs:string,
$childName as xs:string) as element()*
{
$system//*[b/text() = $bValue and not(.//*[local-name() = $childName ])]
};


Ivan Pedruzzi
Stylus Studio Team
Posttop
Kam ChanSubject: Find the parent who doesn't have a particular child
Author: Kam Chan
Date: 07 Jul 2009 10:18 AM
Ivan,

Thank you, that is working.

Kam
   
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