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  <element id="gcc_LightSweetCrudeOil68ContractsSettlementDateMarch222011Member" name="LightSweetCrudeOil68ContractsSettlementDateMarch222011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
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  <element id="gcc_LiveCattle238ContractsSettlementDateFebruary282011Member" name="LiveCattle238ContractsSettlementDateFebruary282011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LiveCattle237ContractsSettlementDateApril292011Member" name="LiveCattle237ContractsSettlementDateApril292011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LiveCattle239ContractsSettlementDateJune302011Member" name="LiveCattle239ContractsSettlementDateJune302011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_NaturalGas142ContractsSettlementDateJanuary272011Member" name="NaturalGas142ContractsSettlementDateJanuary272011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_NaturalGas142ContractsSettlementDateFebruary242011Member" name="NaturalGas142ContractsSettlementDateFebruary242011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_NaturalGas142ContractsSettlementDateMarch292011Member" name="NaturalGas142ContractsSettlementDateMarch292011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_NaturalGas142ContractsSettlementDateApril272011Member" name="NaturalGas142ContractsSettlementDateApril272011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_NaturalGas142ContractsSettlementDateMay262011Member" name="NaturalGas142ContractsSettlementDateMay262011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Platinum176ContractsSettlementDateApril272011Member" name="Platinum176ContractsSettlementDateApril272011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Platinum177ContractsSettlementDateJuly272011Member" name="Platinum177ContractsSettlementDateJuly272011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Silver68ContractsSettlementDateMarch292011Member" name="Silver68ContractsSettlementDateMarch292011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Silver67ContractsSettlementDateMay262011Member" name="Silver67ContractsSettlementDateMay262011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Silver67ContractsSettlementDateJuly272011Member" name="Silver67ContractsSettlementDateJuly272011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Soybean148ContractsSettlementDateMarch142011Member" name="Soybean148ContractsSettlementDateMarch142011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Soybean149ContractsSettlementDateMay132011Member" name="Soybean149ContractsSettlementDateMay132011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Soybean149ContractsSettlementDateJuly142011Member" name="Soybean149ContractsSettlementDateJuly142011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Sugar320ContractsSettlementDateFebruary282011Member" name="Sugar320ContractsSettlementDateFebruary282011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Sugar320ContractsSettlementDateApril292011Member" name="Sugar320ContractsSettlementDateApril292011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Sugar321ContractsSettlementDateJune302011Member" name="Sugar321ContractsSettlementDateJune302011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Wheat256ContractsSettlementDateMarch142011Member" name="Wheat256ContractsSettlementDateMarch142011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Wheat258ContractsSettlementDateMay132011Member" name="Wheat258ContractsSettlementDateMay132011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Wheat257ContractsSettlementDateJuly142011Member" name="Wheat257ContractsSettlementDateJuly142011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_RetainedEarningsGeneralUnits" name="RetainedEarningsGeneralUnits" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="gcc_Copper94ContractsSettlementDateMay262011Member" name="Copper94ContractsSettlementDateMay262011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Copper95ContractsSettlementDateJuly272011Member" name="Copper95ContractsSettlementDateJuly272011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_USTreasuryBills002PercentDueJuly142011Member" name="USTreasuryBills002PercentDueJuly142011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_USTreasuryBills006PercentDueAugust252011Member" name="USTreasuryBills006PercentDueAugust252011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_USTreasuryBills004PercentDueSeptember222011Member" name="USTreasuryBills004PercentDueSeptember222011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Cocoa681ContractsSettlementDateSeptember152011Member" name="Cocoa681ContractsSettlementDateSeptember152011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Cocoa682ContractsSettlementDateDecember142011Member" name="Cocoa682ContractsSettlementDateDecember142011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Coffee215ContractsSettlementDateSeptember202011Member" name="Coffee215ContractsSettlementDateSeptember202011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Coffee215ContractsSettlementDateDecember192011Member" name="Coffee215ContractsSettlementDateDecember192011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Copper201ContractsSettlementDateSeptember282011Member" name="Copper201ContractsSettlementDateSeptember282011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Copper201ContractsSettlementDateDecember282011Member" name="Copper201ContractsSettlementDateDecember282011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Corn678ContractsSettlementDateSeptember142011Member" name="Corn678ContractsSettlementDateSeptember142011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Corn679ContractsSettlementDateDecember142011Member" name="Corn679ContractsSettlementDateDecember142011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Cotton381ContractsSettlementDateDecember072011Member" name="Cotton381ContractsSettlementDateDecember072011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Cotton374ContractsSettlementDateMarch082012Member" name="Cotton374ContractsSettlementDateMarch082012Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_FloridaOrangeJuice529ContractsSettlementDateSeptember122011Member" name="FloridaOrangeJuice529ContractsSettlementDateSeptember122011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_FloridaOrangeJuice528ContractsSettlementDateNovember092011Member" name="FloridaOrangeJuice528ContractsSettlementDateNovember092011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_FloridaOrangeJuice537ContractsSettlementDateJanuary102012Member" name="FloridaOrangeJuice537ContractsSettlementDateJanuary102012Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_RealizedGainLossOnInvestments" name="RealizedGainLossOnInvestments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="gcc_Gold143ContractsSettlementDateDecember282011Member" name="Gold143ContractsSettlementDateDecember282011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Gold143ContractsSettlementDateFebruary272012Member" name="Gold143ContractsSettlementDateFebruary272012Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_HeatingOil68ContractsSettlementDateAugust312011Member" name="HeatingOil68ContractsSettlementDateAugust312011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_HeatingOil69ContractsSettlementDateSeptember302011Member" name="HeatingOil69ContractsSettlementDateSeptember302011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_HeatingOil69ContractsSettlementDateOctober312011Member" name="HeatingOil69ContractsSettlementDateOctober312011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_HeatingOil68ContractsSettlementDateNovember302011Member" name="HeatingOil68ContractsSettlementDateNovember302011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_HeatingOil69ContractsSettlementDateDecember302011Member" name="HeatingOil69ContractsSettlementDateDecember302011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LeanHogs309ContractsSettlementDateAugust122011Member" name="LeanHogs309ContractsSettlementDateAugust122011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LeanHogs310ContractsSettlementDateOctober142011Member" name="LeanHogs310ContractsSettlementDateOctober142011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LeanHogs310ContractsSettlementDateDecember142011Member" name="LeanHogs310ContractsSettlementDateDecember142011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LeanHogs310ContractsSettlementDateFebruary142012Member" name="LeanHogs310ContractsSettlementDateFebruary142012Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LightSweetCrudeOil89ContractsSettlementDateAugust222011Member" name="LightSweetCrudeOil89ContractsSettlementDateAugust222011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LightSweetCrudeOil89ContractsSettlementDateSeptember202011Member" name="LightSweetCrudeOil89ContractsSettlementDateSeptember202011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LightSweetCrudeOil89ContractsSettlementDateOctober202011Member" name="LightSweetCrudeOil89ContractsSettlementDateOctober202011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LightSweetCrudeOil89ContractsSettlementDateNovember182011Member" name="LightSweetCrudeOil89ContractsSettlementDateNovember182011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LightSweetCrudeOil90ContractsSettlementDateDecember202011Member" name="LightSweetCrudeOil90ContractsSettlementDateDecember202011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LiveCattle301ContractsSettlementDateOctober312011Member" name="LiveCattle301ContractsSettlementDateOctober312011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LiveCattle301ContractsSettlementDateDecember302011Member" name="LiveCattle301ContractsSettlementDateDecember302011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LiveCattle301ContractsSettlementDateFebruary292012Member" name="LiveCattle301ContractsSettlementDateFebruary292012Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_NaturalGas188ContractsSettlementDateAugust292011Member" name="NaturalGas188ContractsSettlementDateAugust292011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_NaturalGas188ContractsSettlementDateSeptember282011Member" name="NaturalGas188ContractsSettlementDateSeptember282011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_NaturalGas188ContractsSettlementDateOctober272011Member" name="NaturalGas188ContractsSettlementDateOctober272011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_NaturalGas188ContractsSettlementDateNovember282011Member" name="NaturalGas188ContractsSettlementDateNovember282011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_NaturalGas188ContractsSettlementDateDecember282011Member" name="NaturalGas188ContractsSettlementDateDecember282011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Platinum250ContractsSettlementDateOctober272011Member" name="Platinum250ContractsSettlementDateOctober272011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Platinum249ContractsSettlementDateJanuary272012Member" name="Platinum249ContractsSettlementDateJanuary272012Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Silver124ContractsSettlementDateSeptember282011Member" name="Silver124ContractsSettlementDateSeptember282011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Silver124ContractsSettlementDateDecember282011Member" name="Silver124ContractsSettlementDateDecember282011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Soybean332ContractsSettlementDateNovember142011Member" name="Soybean332ContractsSettlementDateNovember142011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Soybean331ContractsSettlementDateJanuary132012Member" name="Soybean331ContractsSettlementDateJanuary132012Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Sugar739ContractsSettlementDateSeptember302011Member" name="Sugar739ContractsSettlementDateSeptember302011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Sugar741ContractsSettlementDateFebruary292012Member" name="Sugar741ContractsSettlementDateFebruary292012Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Wheat678ContractsSettlementDateSeptember142011Member" name="Wheat678ContractsSettlementDateSeptember142011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_Wheat678ContractsSettlementDateDecember142011Member" name="Wheat678ContractsSettlementDateDecember142011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
</schema>
