I am trying to call the web service from Perl with SOAP:Lite module. The web service has a parameter of complex type that I fail to construct correctly. Here is the relevant portion of wsdl:schema

<complexType name="TagData">
  <sequence>
     <element name="order" type="xsd:int"/>
     <element name="value" type="xsd:string"/>
  </sequence>
</complexType>

<complexType name="ArrayOfTagData">
    <sequence>
     <element maxOccurs="unbounded" minOccurs="0" 
name="item" type='TagData'/>
    </sequence>
</complexType>

<complexType name="Topic">
    <sequence>
     <element name="topicName" type="xsd:string"/>
     <element maxOccurs="1" minOccurs="0" name="tagData"
type="ArrayOfTagData"/>
    </sequence>
</complexType>
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I need to construct parameter of type "Topic" which contains tagData of "ArrayOfTagData" which contains elements of type "TagData". The nested structure and cumbersome SOAP::Data->new syntaxt cause that I fail to generate the envelope with the correct structure and namespacing.
Any help would be appreciated.