Problem with methods returning complex data with field 'result'

[Piotr Szymankiewicz]

I've discoverd strange behaviour of soap11.py. I have a method "Datasource" returning complex type "DataSourceResult":

class DatasourceResult(LadonType):
    status = int
    result = PORTABLE_STRING
    resultMD5 = PORTABLE_STRING

@ladonize(PORTABLE_STRING, rtype=DatasourceResult)
def Datasource(self, params):
...

SOAP response looks like:

<?xml version="1.0" encoding="UTF-8" ?>
<SOAP-ENV:Envelope xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/"...
 <SOAP-ENV:Body SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
  <ns:DatasourceResponse>
   <status>0</status>
   <resultMD5>3c051ad8586ec921c5cee8425784e955</resultMD5>
   <result>......</result>
  </ns:DatasourceResponse>
 </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

But when I change parameter name in "DatasourceResult" from "result" to "xxx" SOAP response is different (element <result> appears):

<?xml version="1.0" encoding="UTF-8" ?>
<SOAP-ENV:Envelope xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/"...
 <SOAP-ENV:Body SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
  <ns:DatasourceResponse>
   <result>
     <status>0</status>
     <resultMD5>3c051ad8586ec921c5cee8425784e955</resultMD5>
     <xxx>......</xxx>
    </result>
  </ns:DatasourceResponse>
 </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

Unfortunately .../soap11/description is identical in both cases (except "xxx" of course). My client application works fine only in latter case, in former case it cannot retrive the result. I think something is wrong at the server side.