response:
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
   <s:Body>
      <RequestResponse xmlns="http://Hetras.Product.ServiceContract.GenericUnitType.v1_0Package.IGenericUnitTypePackage">
         <RequestResult xmlns:a="http://schemas.datacontract.org/2004/07/Hetras.Product.DataContract.GenericUnitType.v1_0" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
            <ResultCode xmlns="http://schemas.datacontract.org/2004/07/Hetras.Library.Instrumentation.Errors">Successful</ResultCode>
            <Errors i:nil="true" xmlns="http://schemas.datacontract.org/2004/07/Hetras.Library.Instrumentation.Errors"/>
            <Infos i:nil="true" xmlns="http://schemas.datacontract.org/2004/07/Hetras.Library.Instrumentation.Errors"/>
            <Warnings i:nil="true" xmlns="http://schemas.datacontract.org/2004/07/Hetras.Library.Instrumentation.Errors"/>
            <TransactionHandleName i:nil="true" xmlns="http://schemas.datacontract.org/2004/07/Hetras.Library.Instrumentation.Errors"/>
            <a:ResultSet>
               <a:Items>
                  <a:GenericUnitTypeDCResultItem>
                     <InstanceCode xmlns="http://schemas.datacontract.org/2004/07/Hetras.Library.CommonCode.Generic">I001</InstanceCode>
                     <ComponentCode xmlns="http://schemas.datacontract.org/2004/07/Hetras.Product.DataContract.BaseComponent.v1_0">HILTONUT</ComponentCode>
                     <SupplierCode xmlns="http://schemas.datacontract.org/2004/07/Hetras.Product.DataContract.BaseComponent.v1_0">HILTONUT</SupplierCode>
                     <Sequence xmlns="http://schemas.datacontract.org/2004/07/Hetras.Product.DataContract.Base">0</Sequence>
                     <Languages i:nil="true" xmlns="http://schemas.datacontract.org/2004/07/Hetras.Product.DataContract.Base" xmlns:b="http://schemas.datacontract.org/2004/07/Hetras.Library.CommonCode.Generic"/>
                     <a:GenericUnitTypeCode>DELUXE</a:GenericUnitTypeCode>
                     <a:GenericUnitTypeName>DELUXE ROOM</a:GenericUnitTypeName>
                     <a:Comment>DELUXE ROOM - 2 DOUBLE BEDS</a:Comment>
                     <a:Description>2 DOUBLE BEDS</a:Description>
                     <a:MinimumPersons>2</a:MinimumPersons>
                     <a:MaximumPersons>4</a:MaximumPersons>
                     <a:ExpectedOccupancy>2</a:ExpectedOccupancy>
                     <a:BeddingType>Queen</a:BeddingType>
                     <a:CustomField i:nil="true" xmlns:b="http://schemas.datacontract.org/2004/07/Hetras.Library.CommonCode.Generic"/>
                     <a:History xmlns:b="http://schemas.datacontract.org/2004/07/Hetras.Library.DataContract.History.v1_0">
                        <b:Created>2009-11-06T12:49:54.813</b:Created>
                        <b:CreatedBy>STTenantAdmin_A001</b:CreatedBy>
                        <b:LastModified>2009-11-06T12:49:54.813</b:LastModified>
                        <b:LastModifiedBy>STTenantAdmin_A001</b:LastModifiedBy>
                     </a:History>
                  </a:GenericUnitTypeDCResultItem>
                  <a:GenericUnitTypeDCResultItem>
                     <InstanceCode xmlns="http://schemas.datacontract.org/2004/07/Hetras.Library.CommonCode.Generic">I001</InstanceCode>
                     <ComponentCode xmlns="http://schemas.datacontract.org/2004/07/Hetras.Product.DataContract.BaseComponent.v1_0">HILTONUT</ComponentCode>
                     <SupplierCode xmlns="http://schemas.datacontract.org/2004/07/Hetras.Product.DataContract.BaseComponent.v1_0">HILTONUT</SupplierCode>
                     <Sequence xmlns="http://schemas.datacontract.org/2004/07/Hetras.Product.DataContract.Base">1</Sequence>
                     <Languages i:nil="true" xmlns="http://schemas.datacontract.org/2004/07/Hetras.Product.DataContract.Base" xmlns:b="http://schemas.datacontract.org/2004/07/Hetras.Library.CommonCode.Generic"/>
                     <a:GenericUnitTypeCode>SINGLE</a:GenericUnitTypeCode>
                     <a:GenericUnitTypeName>SINGLE ROOM</a:GenericUnitTypeName>
                     <a:Comment>2 SINGLE BEDS</a:Comment>
                     <a:Description>29 SINGLE ROOMS</a:Description>
                     <a:MinimumPersons>1</a:MinimumPersons>
                     <a:MaximumPersons>2</a:MaximumPersons>
                     <a:ExpectedOccupancy>2</a:ExpectedOccupancy>
                     <a:BeddingType>Single</a:BeddingType>
                     <a:CustomField i:nil="true" xmlns:b="http://schemas.datacontract.org/2004/07/Hetras.Library.CommonCode.Generic"/>
                     <a:History xmlns:b="http://schemas.datacontract.org/2004/07/Hetras.Library.DataContract.History.v1_0">
                        <b:Created>2009-11-06T12:49:54.847</b:Created>
                        <b:CreatedBy>STTenantAdmin_A001</b:CreatedBy>
                        <b:LastModified>2009-11-06T12:49:54.847</b:LastModified>
                        <b:LastModifiedBy>STTenantAdmin_A001</b:LastModifiedBy>
                     </a:History>
                  </a:GenericUnitTypeDCResultItem>
               </a:Items>
            </a:ResultSet>
         </RequestResult>
      </RequestResponse>
   </s:Body>
</s:Envelope>


assertion 1 that works:
declare namespace ns1='http://Hetras.Product.ServiceContract.GenericUnitType.v1_0Package.IGenericUnitTypePackage';
declare namespace a='http://schemas.datacontract.org/2004/07/Hetras.Product.DataContract.GenericUnitType.v1_0';
//ns1:RequestResponse[1]/ns1:RequestResult[1]/a:ResultSet[1]/a:Items[1]/a:GenericUnitTypeDCResultItem[1]

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

<a:GenericUnitTypeDCResultItem xmlns:a="http://schemas.datacontract.org/2004/07/Hetras.Product.DataContract.GenericUnitType.v1_0" xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://Hetras.Product.ServiceContract.GenericUnitType.v1_0Package.IGenericUnitTypePackage" xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
  <InstanceCode xmlns="http://schemas.datacontract.org/2004/07/Hetras.Library.CommonCode.Generic">I001</InstanceCode>
  <ComponentCode xmlns="http://schemas.datacontract.org/2004/07/Hetras.Product.DataContract.BaseComponent.v1_0">HILTONUT</ComponentCode>
  <SupplierCode xmlns="http://schemas.datacontract.org/2004/07/Hetras.Product.DataContract.BaseComponent.v1_0">HILTONUT</SupplierCode>
  <Sequence xmlns="http://schemas.datacontract.org/2004/07/Hetras.Product.DataContract.Base">0</Sequence>
  <Languages i:nil="true" xmlns="http://schemas.datacontract.org/2004/07/Hetras.Product.DataContract.Base" xmlns:b="http://schemas.datacontract.org/2004/07/Hetras.Library.CommonCode.Generic"/>
  <a:GenericUnitTypeCode>DELUXE</a:GenericUnitTypeCode>
  <a:GenericUnitTypeName>DELUXE ROOM</a:GenericUnitTypeName>
  <a:Comment>DELUXE ROOM - 2 DOUBLE BEDS</a:Comment>
  <a:Description>2 DOUBLE BEDS</a:Description>
  <a:MinimumPersons>2</a:MinimumPersons>
  <a:MaximumPersons>4</a:MaximumPersons>
  <a:ExpectedOccupancy>2</a:ExpectedOccupancy>
  <a:BeddingType>Queen</a:BeddingType>
  <a:CustomField i:nil="true" xmlns:b="http://schemas.datacontract.org/2004/07/Hetras.Library.CommonCode.Generic"/>
  <a:History xmlns:b="http://schemas.datacontract.org/2004/07/Hetras.Library.DataContract.History.v1_0">
    <b:Created>*</b:Created>
    <b:CreatedBy>STTenantAdmin_A001</b:CreatedBy>
    <b:LastModified>*</b:LastModified>
    <b:LastModifiedBy>STTenantAdmin_A001</b:LastModifiedBy>
  </a:History>
</a:GenericUnitTypeDCResultItem>

assertion 2 that doesnt work:
declare namespace ns1='http://Hetras.Product.ServiceContract.GenericUnitType.v1_0Package.IGenericUnitTypePackage';
declare namespace a='http://schemas.datacontract.org/2004/07/Hetras.Product.DataContract.GenericUnitType.v1_0';
//ns1:RequestResponse[1]/ns1:RequestResult[1]/a:ResultSet[1]/a:Items[1]/a:GenericUnitTypeDCResultItem[2]

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

<a:GenericUnitTypeDCResultItem xmlns:a="http://schemas.datacontract.org/2004/07/Hetras.Product.DataContract.GenericUnitType.v1_0" xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://Hetras.Product.ServiceContract.GenericUnitType.v1_0Package.IGenericUnitTypePackage" xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
  <InstanceCode xmlns="http://schemas.datacontract.org/2004/07/Hetras.Library.CommonCode.Generic">I001</InstanceCode>
  <ComponentCode xmlns="http://schemas.datacontract.org/2004/07/Hetras.Product.DataContract.BaseComponent.v1_0">HILTONUT</ComponentCode>
  <SupplierCode xmlns="http://schemas.datacontract.org/2004/07/Hetras.Product.DataContract.BaseComponent.v1_0">HILTONUT</SupplierCode>
  <Sequence xmlns="http://schemas.datacontract.org/2004/07/Hetras.Product.DataContract.Base">1</Sequence>
  <Languages i:nil="true" xmlns="http://schemas.datacontract.org/2004/07/Hetras.Product.DataContract.Base" xmlns:b="http://schemas.datacontract.org/2004/07/Hetras.Library.CommonCode.Generic"/>
  <a:GenericUnitTypeCode>SINGLE</a:GenericUnitTypeCode>
  <a:GenericUnitTypeName>SINGLE ROOM</a:GenericUnitTypeName>
  <a:Comment>2 SINGLE BEDS</a:Comment>
  <a:Description>29 SINGLE ROOMS</a:Description>
  <a:MinimumPersons>1</a:MinimumPersons>
  <a:MaximumPersons>2</a:MaximumPersons>
  <a:ExpectedOccupancy>2</a:ExpectedOccupancy>
  <a:BeddingType>Single</a:BeddingType>
  <a:CustomField i:nil="true" xmlns:b="http://schemas.datacontract.org/2004/07/Hetras.Library.CommonCode.Generic"/>
  <a:History xmlns:b="http://schemas.datacontract.org/2004/07/Hetras.Library.DataContract.History.v1_0">
    <b:Created>*</b:Created>
    <b:CreatedBy>STTenantAdmin_A001</b:CreatedBy>
    <b:LastModified>*</b:LastModified>
    <b:LastModifiedBy>STTenantAdmin_A001</b:LastModifiedBy>
  </a:History>
</a:GenericUnitTypeDCResultItem>