<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">

  <xs:element name="ReferenceData">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="ReferenceDatum" maxOccurs="unbounded" minOccurs="0">
          <xs:complexType>
            <xs:sequence>
              <xs:element type="xs:string" name="Type" minOccurs="1" maxOccurs="1" />
              <xs:group ref="referenceDataTypes"/>
            </xs:sequence>
            <xs:attribute type="xs:string" name="id" use="required"/>
            <xs:attribute type="xs:string" name="validFrom"/>
          </xs:complexType>
        </xs:element>
      </xs:sequence>
    </xs:complexType>
  </xs:element>

  <xs:group name="referenceDataTypes">
    <xs:choice>
      <xs:element type="currencyHedgedIndexReferenceDatum" name="CurrencyHedgedEquityIndexReferenceData"/>
      <xs:element type="indexReferenceDatum" name="EquityIndexReferenceData"/>
      <xs:element type="indexReferenceDatum" name="CommodityIndexReferenceData"/>
      <xs:element type="creditIndexReferenceDatum" name="CreditIndexReferenceData"/>
      <xs:element type="bondReferenceDatum" name="BondReferenceData"/>
      <xs:element type="cboReferenceDatum" name="CboReferenceData"/>
      <xs:element type="bondFutureReferenceDatum" name="BondFutureReferenceData"/>
      <xs:element type="convertibleBondReferenceDatum" name="ConvertibleBondReferenceData"/>
      <xs:element type="callableBondReferenceDatum" name="CallableBondReferenceData"/>
      <xs:element type="bondBasketData" name="BondBasketData"/>
      <xs:element type="referenceDatum" name="CreditReferenceData"/>
      <xs:element type="equityReferenceDatum" name="EquityReferenceData"/>
      <xs:element type="portfolioBasketReferenceDatum" name="PortfolioBasketReferenceData"/>
    </xs:choice>
  </xs:group>

  <xs:complexType name="indexReferenceDatum">
    <xs:sequence>
      <xs:element name="Underlying" maxOccurs="unbounded" minOccurs="0">
        <xs:complexType>
          <xs:all>
            <xs:element type="xs:string" name="Name" minOccurs="1" maxOccurs="1"/>
            <xs:element type="xs:float" name="Weight" minOccurs="1" maxOccurs="1"/>
          </xs:all>
        </xs:complexType>
      </xs:element>
    </xs:sequence>
  </xs:complexType>

  <xs:complexType name="equityReferenceDatum">
    <xs:sequence>
      <xs:element name="EquityId" minOccurs="0" maxOccurs="1"/>
      <xs:element name="EquityName" minOccurs="0" maxOccurs="1" />
      <xs:element name="Currency" minOccurs="1" maxOccurs="1" />
      <xs:element name="ScalingFactor"  minOccurs="0" maxOccurs="1"/>
      <xs:element name="ExchangeCode" minOccurs="1" maxOccurs="1"/>
      <xs:element name="IsIndex" minOccurs="1" maxOccurs="1"/>
      <xs:element name="EquityStartDate" minOccurs="1" maxOccurs="1"/>
      <xs:element name="ProxyIdentifier" minOccurs="1" maxOccurs="1"/>
      <xs:element name="SimmBucket" minOccurs="1" maxOccurs="1"/>
      <xs:element name="CrifQualifier" minOccurs="1" maxOccurs="1"/>
      <xs:element name="ProxyVolatilityId" minOccurs="1" maxOccurs="1"/>
    </xs:sequence>
  </xs:complexType>

  <xs:complexType name="creditIndexReferenceDatum">
    <xs:sequence>
      <xs:element name="IndexFamily" minOccurs="0" maxOccurs="1"/>
      <xs:element name="IndexSubFamily" minOccurs="0" maxOccurs="1" />
      <xs:element name="Underlying" maxOccurs="unbounded" minOccurs="0">
        <xs:complexType>
          <xs:all>
            <xs:element type="xs:string" name="Name" minOccurs="1" maxOccurs="1"/>
            <xs:element type="weightType" name="Weight" minOccurs="1" maxOccurs="1"/>
            <xs:element type="weightType" name="PriorWeight" minOccurs="0" maxOccurs="1"/>
            <xs:element type="recoveryRate" name="RecoveryRate" minOccurs="0" maxOccurs="1"/>
            <xs:element type="date" name="AuctionDate" minOccurs="0" maxOccurs="1"/>
            <xs:element type="date" name="AuctionSettlementDate" minOccurs="0" maxOccurs="1"/>
            <xs:element type="date" name="DefaultDate" minOccurs="0" maxOccurs="1"/>
            <xs:element type="date" name="EventDeterminationDate" minOccurs="0" maxOccurs="1"/>
          </xs:all>
        </xs:complexType>
      </xs:element>
    </xs:sequence>
  </xs:complexType>

  <xs:complexType name="bondReferenceDatum">
    <xs:sequence>
      <xs:element type="xs:string" name="IssuerId"/>
      <xs:element type="xs:string" name="CreditCurveId" minOccurs="0"/>
      <xs:element type="xs:string" name="CreditGroup" minOccurs="0"/>
      <xs:element type="xs:string" name="ReferenceCurveId" minOccurs="0"/>
      <xs:element type="xs:string" name="IncomeCurveId" minOccurs="0"/>
      <xs:element type="xs:string" name="VolatilityCurveId" minOccurs="0"/>
      <xs:element type="xs:string" name="SettlementDays"/>
      <xs:element type="xs:string" name="Calendar"/>
      <xs:element type="xs:string" name="IssueDate"/>
      <xs:element type="xs:string" name="PriceQuoteMethod" minOccurs="0"/>
      <xs:element type="xs:string" name="PriceQuoteBaseValue" minOccurs="0"/>
      <xs:element type="legData" name="LegData" maxOccurs="unbounded" minOccurs="0"/>
      <xs:element type="xs:string" name="SubType" minOccurs="0"/>
      <xs:element type="bondPriceType" name="PriceType" minOccurs="0"/>
    </xs:sequence>
  </xs:complexType>

  <xs:complexType name="cboReferenceDatum">
    <xs:all>
      <xs:element type="xs:string" name="DayCounter"/>
      <xs:element type="xs:string" name="PaymentConvention"/>
      <xs:element type="currencyCode" name="Currency"/>
      <xs:element type="xs:string" name="ReinvestmentEndDate" maxOccurs="1" minOccurs="0"/>
      <xs:element type="xs:float" name="SeniorFee"/>
      <xs:element type="xs:string" name="FeeDayCounter"/>
      <xs:element type="xs:float" name="SubordinatedFee"/>
      <xs:element type="xs:float" name="EquityKicker"/>
      <xs:element type="cboBondBasketData" name="BondBasketData" maxOccurs="1" minOccurs="1"/>
      <xs:element type="cbotranches" name="CBOTranches" maxOccurs="1" minOccurs="1"/>
      <xs:element type="scheduleData" name="ScheduleData"/>
    </xs:all>
  </xs:complexType>

  <xs:complexType name="bondFutureReferenceDatum">
    <xs:all>
      <xs:element type="currencyCode" name="Currency" minOccurs="0"/>
      <xs:element type="deliveryBasket" name="DeliveryBasket" minOccurs="0"/>
      <xs:element type="xs:string" name="DeliverableGrade" minOccurs="0"/>
      <xs:element type="xs:string" name="LastTradingDate" minOccurs="0"/>
      <xs:element type="xs:string" name="LastDeliveryDate" minOccurs="0"/>
      <xs:element type="xs:string" name="Settlement" minOccurs="0"/>
      <xs:element type="xs:string" name="DirtyQuotation" minOccurs="0"/>
      <xs:element type="xs:string" name="ContractMonth" minOccurs="0"/>
      <xs:element type="xs:string" name="RootDate" minOccurs="0"/>
      <xs:element type="xs:string" name="ExpiryBasis" minOccurs="0"/>
      <xs:element type="xs:string" name="SettlementBasis" minOccurs="0"/>
      <xs:element type="xs:string" name="ExpiryLag" minOccurs="0"/>
      <xs:element type="xs:string" name="SettlementLag" minOccurs="0"/>
    </xs:all>
  </xs:complexType>

  <xs:complexType name="convertibleBondReferenceDatum">
    <xs:all>
      <xs:element type="bondReferenceDatum" name="BondData"/>
      <xs:element type="cbCallData" name="CallData" minOccurs="0"/>
      <xs:element type="cbCallData" name="PutData" minOccurs="0"/>
      <xs:element type="cbConversionData" name="ConversionData"/>
      <xs:element type="cbDividendProtectionData" name="DividendProtectionData" minOccurs="0"/>
      <xs:element type="bool" name="Detachable" minOccurs="0"/>
    </xs:all>
  </xs:complexType>

  <xs:complexType name="callableBondReferenceDatum">
    <xs:all>
      <xs:element type="bondReferenceDatum" name="BondData"/>
      <xs:element type="callableBondCallData" name="CallData" minOccurs="0"/>
      <xs:element type="callableBondCallData" name="PutData" minOccurs="0"/>
    </xs:all>
  </xs:complexType>

  <xs:complexType name="referenceDatum">
    <xs:sequence>
      <xs:any processContents="lax" minOccurs="0" maxOccurs="unbounded" />
    </xs:sequence>
  </xs:complexType>

  <xs:complexType name="currencyHedgedIndexReferenceDatum">
    <xs:sequence>
    <xs:element type="xs:string" name="UnderlyingIndex" minOccurs="1"/>
    <xs:element type="currencyCode" name="HedgeCurrency" minOccurs="1"/>
    <xs:element type="CurrencyHedgedIndexRebalancingStrategy" name="RebalancingStrategy" minOccurs="1"/>
    <xs:element type="xs:string" name="ReferenceDateOffset" minOccurs="1"/>
    <xs:element type="CurrencyHedgedIndexRehedgingStrategy" name="HedgeAdjustment" minOccurs="1"/>
    <xs:element type="xs:string" name="HedgeCalendar" minOccurs="1"/>
    <xs:element name="FxIndexes" maxOccurs="unbounded" minOccurs="1">
      <xs:complexType>
        <xs:sequence>
          <xs:element name="FxIndex" maxOccurs="unbounded" minOccurs="0">
            <xs:complexType>
              <xs:all>
                <xs:element type="xs:string" name="Currency" minOccurs="1" maxOccurs="1"/>
                <xs:element type="xs:string" name="IndexName" minOccurs="1" maxOccurs="1"/>
              </xs:all>
            </xs:complexType>
          </xs:element>
        </xs:sequence>
      </xs:complexType>
    </xs:element>
    <xs:element name="IndexWeightsAtLastRebalancingDate" maxOccurs="unbounded" minOccurs="0">
      <xs:complexType>
        <xs:sequence>
          <xs:element name="Underlying" maxOccurs="unbounded" minOccurs="0">
            <xs:complexType>
              <xs:all>
                <xs:element type="xs:string" name="Name" minOccurs="1" maxOccurs="1"/>
                <xs:element type="xs:float" name="Weight" minOccurs="1" maxOccurs="1"/>
              </xs:all>
            </xs:complexType>
          </xs:element>
        </xs:sequence>
      </xs:complexType>
    </xs:element>
    </xs:sequence>
  </xs:complexType>
  
  <xs:complexType name="portfolioBasketReferenceDatum">
    <xs:sequence>
      <xs:element name="Components">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="Trade" maxOccurs="unbounded">
              <xs:complexType>
                <xs:sequence>
                  <xs:element type="oreTradeType" name="TradeType"/>
                  <xs:element type="envelope" name="Envelope" minOccurs="0"/>
                  <xs:group ref="oreTradeData"/>
                </xs:sequence>
                <xs:attribute type="xs:string" name="id"/>
              </xs:complexType>
            </xs:element>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
    </xs:sequence>
  </xs:complexType>

</xs:schema>