<soapenv:Header>
</ns1:RequestHeader>
</soapenv:Header>
<soapenv:Body>
<serviceSelector>
<ns16:field>PoNumber</ns16:field>
<ns16:operator>EQUALS</ns16:operator>
<ns16:values>33</ns16:values>
</ns16:predicates>
<ns17:min>20151026</ns17:min>
<ns17:max>20151026</ns17:max>
</ns17:dateRange>
<ns17:numberResults>100</ns17:numberResults>
</ns17:paging>
</serviceSelector>
</get>
</soapenv:Body>
</soapenv:Envelope>
I receive 3 entries, 2 with empty field and one with PoNumber = 31. Also you observe that date range is wrong and I still receive results so interval does not quite matter.