<?xml version="1.0" encoding="UTF-8"?>
<soapenv:Envelope 
    xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" 
    xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <soapenv:Body>
    <ns1:Discover 
    soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" 
    xmlns:ns1="urn:schemas-microsoft-com:xml-analysis">
        <RequestType xsi:type="xsd:string">DISCOVER_DATASOURCES</RequestType>
        <Restrictions>
            <RestrictionList/>
        </Restrictions>
        <Properties>
            <PropertyList>
                <Content>None</Content>
            </PropertyList>
        </Properties>
    </ns1:Discover>
    </soapenv:Body>
</soapenv:Envelope>