my $soap_wdsl = 'example.wsdl'; # retrieved previously
my $client = XML::Compile::WSDL11->new( $soap_wdsl );
my $call = $client->compileClient('setTransaction');
my $response = $call->( $params );


<SOAP-ENV:Envelope
	xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">

<SOAP-ENV:Body>
	<tns:setTransaction xmlns:tns="http://soap.example.com/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
		<PARAMS HERE>
	</tns:setTransaction>
</SOAP-ENV:Body>