Query on REST based services in soapUI 2.5.1

Thanks Ole, For the response. But the tool is not able to invoke the service if i give the uri where the xml file is located for the rest service.when i try to invoke it says

ERROR:An error occured [WSDLException (at /PersonsT): faultCode=INVALID_WSDL: Expected element '{http://schemas.xmlsoap.org/wsdl/}definitions'.]

there is just a xml file in the url specified.I just want to know whether that can be invoked in the tool.

Thanks in Advance,
Saberesh C P