SOAP-Lite Empty Strings

JamesBrown has asked for the wisdom of the Perl Monks concerning the following question:

Dear Monks, I'm using SOAP::Lite and am trying to generate this XML string for Cisco Call Manager's AXL service:

<destination xsi:type="xsd:string"></destination>
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The intention is to send an empty string in order to remove a Call Forward setting. Unfortunately, a debug reveals that SOAP::Lite uses the abbreviated notation and Cisco doesn't seem to like it:

<destination xsi:type="xsd:string" />
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My code is as follows:

$oResult = $oCM->updateLine( SOAP::Data->name('destination' => '') );
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Could anyone advise me on how to force SOAP::Lite to generate the longer notation please? Many thanks James.

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