The request

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" 
 xmlns:pws="http://servicecenter.peregrine.com/PWS" 
 xmlns:com="http://servicecenter.peregrine.com/PWS/Common">
   <soapenv:Header/>
   <soapenv:Body>
      <pws:RetrieveIncidentKeysListRequest attachmentInfo="?" 
       attachmentData="?" ignoreEmptyElements="true">
         <pws:model query="">
            <pws:keys query=" update.time>'05/01/08'">
               <pws:IncidentID type="String" mandatory="?" readonly="?">
               </pws:IncidentID>
            </pws:keys>
            <pws:instance query=" " uniquequery="?" recordid="?">
               <pws:IncidentID type="String" mandatory="?" readonly="?">
               </pws:IncidentID>
               <pws:Category type="String" mandatory="?" readonly="?">
               </pws:Category>
               <pws:OpenTime type="DateTime" mandatory="?" readonly="?">
               </pws:OpenTime>
               <pws:OpenedBy type="String" mandatory="?" readonly="?">
               </pws:OpenedBy>
               <pws:severity type="String" mandatory="?" readonly="?">
               </pws:severity>
               <pws:UpdatedTime type="DateTime" mandatory="?" 
                readonly="?"></pws:UpdatedTime>
               <pws:PrimaryAssignmentGroup type="String" mandatory="?" 
                readonly="?"></pws:PrimaryAssignmentGroup>
               <pws:ClosedTime type="DateTime" mandatory="?" 
                readonly="?"></pws:ClosedTime>
               <pws:ClosedBy type="String" mandatory="?" readonly="?">
               </pws:ClosedBy>
               <pws:ClosureCode type="String" mandatory="?" readonly="?">
               </pws:ClosureCode>
               <pws:ConfigurationItem type="String" mandatory="?" 
                readonly="?"></pws:ConfigurationItem>
               <pws:Location type="String" mandatory="?" readonly="?">
               </pws:Location>
               <pws:IncidentDescription type="Array">
                  <pws:IncidentDescription type="String" mandatory="?" 
                   readonly="?"></pws:IncidentDescription>
               </pws:IncidentDescription>
               <pws:Resolution type="Array">
                  <pws:Resolution type="String" mandatory="?" 
                   readonly="?"></pws:Resolution>
               </pws:Resolution>
               <pws:AssigneeName type="String" mandatory="?" readonly="?">
               </pws:AssigneeName>
               <pws:Contact type="String" mandatory="?" readonly="?">
               </pws:Contact>
                <pws:JournalUpdates type="Array">
                  <pws:JournalUpdates type="String" mandatory="?" 
                   readonly="?"></pws:JournalUpdates>
               </pws:JournalUpdates>
               <pws:AlertStatus type="String" mandatory="?" readonly="?">
               </pws:AlertStatus>
               <pws:ContactLastName type="String" mandatory="?" 
                readonly="?"></pws:ContactLastName>
               <pws:ContactFirstName type="String" mandatory="?" 
                readonly="?"></pws:ContactFirstName>
               <pws:Company type="String" mandatory="?" readonly="?">
               </pws:Company>
               <pws:BriefDescription type="String" mandatory="?" 
                readonly="?"></pws:BriefDescription>
               <pws:TicketOwner type="String" mandatory="?" readonly="?">
               </pws:TicketOwner>
               <pws:UpdatedBy type="String" mandatory="?" readonly="?">
               </pws:UpdatedBy>
               <pws:IMTicketStatus type="String" mandatory="?" 
                readonly="?"></pws:IMTicketStatus>
               <pws:Subcategory type="String" mandatory="?" readonly="?">
               </pws:Subcategory>
               <pws:SLAAgreementID type="Decimal" mandatory="?" 
                readonly="?"></pws:SLAAgreementID>
               <pws:SiteCategory type="String" mandatory="?" readonly="?">
               </pws:SiteCategory>
               <pws:ProductType type="String" mandatory="?" readonly="?">
               </pws:ProductType>
               <pws:ProblemType type="String" mandatory="?" readonly="?">
               </pws:ProblemType>
               <pws:ResolutionFixType type="String" mandatory="?" 
                readonly="?"></pws:ResolutionFixType>
               <pws:UserPriority type="String" mandatory="?" readonly="?">
               </pws:UserPriority>
               <pws:Solution type="Array">
                  <pws:Solution type="String" mandatory="?" readonly="?">
                  </pws:Solution>
               </pws:Solution>
               <pws:InitialImpact type="String" mandatory="?" 
                readonly="?"></pws:InitialImpact>
               <pws:folder type="String" mandatory="?" readonly="?">
               </pws:folder>
            </pws:instance>
            <pws:messages>
                <com:message type="String" mandatory="?" 
                 readonly="?" severity="?" module="?">?</com:message>
            </pws:messages>
         </pws:model>
      </pws:RetrieveIncidentKeysListRequest>
   </soapenv:Body>
</soapenv:Envelope>