In which SOAP test suite can we add conditional elements like if and use injected values?

I have a business file which contains a structure similar to SOAP message. It contains Envelope, Header and Body elements however there are also some unknown elements as:

<#if IF ${CarMake='VOLVO'}>
  <bounty>18000</bounty>
</#if>

Could you please suggest where does this syntax come from? Is it some kind of SoapUI test case configuration file?