<?xml version="1.0" encoding="UTF-8" ?>
<!-- Generated by DataTracks version 1.1.9 on 08-Nov-2016 [06:47:45] {PM} EST - www.datatracks.com -->
<schema targetNamespace="http://www.unitedstates12monthnaturalgasfund.com/20160930" elementFormDefault="qualified" xmlns:unl="http://www.unitedstates12monthnaturalgasfund.com/20160930" xmlns="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xl="http://www.xbrl.org/2003/XLink" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:us-gaap="http://fasb.org/us-gaap/2016-01-31" xmlns:country="http://xbrl.sec.gov/country/2016-01-31" xmlns:currency="http://xbrl.sec.gov/currency/2016-01-31" xmlns:dei="http://xbrl.sec.gov/dei/2014-01-31" xmlns:exch="http://xbrl.sec.gov/exch/2016-01-31" xmlns:invest="http://xbrl.sec.gov/invest/2013-01-31" xmlns:naics="http://xbrl.sec.gov/naics/2011-01-31" xmlns:sic="http://xbrl.sec.gov/sic/2011-01-31" xmlns:us-types="http://fasb.org/us-types/2016-01-31" xmlns:stpr="http://xbrl.sec.gov/stpr/2011-01-31" xmlns:deprecated="http://www.xbrl.org/2009/arcrole/fact-explanatoryFact" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:num="http://www.xbrl.org/dtr/type/numeric">
  <annotation>
    <appinfo>
      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/DocumentAndEntityInformation" id="DocumentAndEntityInformation">
        <link:definition>101 - Document - Document And Entity Information</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/CondensedStatementsOfFinancialCondition" id="CondensedStatementsOfFinancialCondition">
        <link:definition>102 - Statement - Condensed Statements of Financial Condition</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/CondensedScheduleOfInvestments" id="CondensedScheduleOfInvestments">
        <link:definition>103 - Statement - Condensed Schedule of Investments</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/CondensedScheduleOfInvestmentsParenthetical" id="CondensedScheduleOfInvestmentsParenthetical">
        <link:definition>104 - Statement - Condensed Schedule of Investments (Parenthetical)</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/CondensedStatementsOfOperations" id="CondensedStatementsOfOperations">
        <link:definition>105 - Statement - Condensed Statements of Operations</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/CondensedStatementOfChangesInPartnersCapital" id="CondensedStatementOfChangesInPartnersCapital">
        <link:definition>106 - Statement - Condensed Statement of Changes in Partners&#39; Capital</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/CondensedStatementOfChangesInPartnersCapitalParenthetical" id="CondensedStatementOfChangesInPartnersCapitalParenthetical">
        <link:definition>107 - Statement - Condensed Statement of Changes in Partners&#39; Capital (Parenthetical)</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/CondensedStatementsOfCashFlows" id="CondensedStatementsOfCashFlows">
        <link:definition>108 - Statement - Condensed Statements of Cash Flows</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/OrganizationAndBusiness" id="OrganizationAndBusiness">
        <link:definition>109 - Disclosure - ORGANIZATION AND BUSINESS</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/SummaryOfSignificantAccountingPolicies" id="SummaryOfSignificantAccountingPolicies">
        <link:definition>110 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/FeesPaidByFundAndRelatedPartyTransactions" id="FeesPaidByFundAndRelatedPartyTransactions">
        <link:definition>111 - Disclosure - FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/ContractsAndAgreements" id="ContractsAndAgreements">
        <link:definition>112 - Disclosure - CONTRACTS AND AGREEMENTS</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/FinancialInstrumentsOffbalanceSheetRisksAndContingencies" id="FinancialInstrumentsOffbalanceSheetRisksAndContingencies">
        <link:definition>113 - Disclosure - FINANCIAL INSTRUMENTS, OFF-BALANCE SHEET RISKS AND CONTINGENCIES</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/FinancialHighlights" id="FinancialHighlights">
        <link:definition>114 - Disclosure - FINANCIAL HIGHLIGHTS</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/FairValueOfFinancialInstruments" id="FairValueOfFinancialInstruments">
        <link:definition>115 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/SubsequentEvents" id="SubsequentEvents">
        <link:definition>116 - Disclosure - SUBSEQUENT EVENTS</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/SummaryOfSignificantAccountingPoliciesPolicies" id="SummaryOfSignificantAccountingPoliciesPolicies">
        <link:definition>117 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/ContractsAndAgreementsTables" id="ContractsAndAgreementsTables">
        <link:definition>118 - Disclosure - CONTRACTS AND AGREEMENTS (Tables)</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/FinancialHighlightsTables" id="FinancialHighlightsTables">
        <link:definition>119 - Disclosure - FINANCIAL HIGHLIGHTS (Tables)</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/FairValueOfFinancialInstrumentsTables" id="FairValueOfFinancialInstrumentsTables">
        <link:definition>120 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/OrganizationAndBusinessAdditionalInformationDetails" id="OrganizationAndBusinessAdditionalInformationDetails">
        <link:definition>121 - Disclosure - ORGANIZATION AND BUSINESS (Additional Information) (Details)</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/SummaryOfSignificantAccountingPoliciesAdditionalInformationDetails" id="SummaryOfSignificantAccountingPoliciesAdditionalInformationDetails">
        <link:definition>122 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Additional Information) (Details)</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/FeesPaidByFundAndRelatedPartyTransactionsAdditionalInformationDetails" id="FeesPaidByFundAndRelatedPartyTransactionsAdditionalInformationDetails">
        <link:definition>123 - Disclosure - FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS - (Additional Information) (Details)</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/ContractsAndAgreementsBrokerageCommissionsDetails" id="ContractsAndAgreementsBrokerageCommissionsDetails">
        <link:definition>124 - Disclosure - CONTRACTS AND AGREEMENTS (Brokerage Commissions) (Details)</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/ContractsAndAgreementsAdditionalInformationDetails" id="ContractsAndAgreementsAdditionalInformationDetails">
        <link:definition>125 - Disclosure - CONTRACTS AND AGREEMENTS (Additional Information) (Details)</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/FinancialInstrumentsOffbalanceSheetRisksAndContingenciesAdditionalInformationDetails" id="FinancialInstrumentsOffbalanceSheetRisksAndContingenciesAdditionalInformationDetails">
        <link:definition>126 - Disclosure - FINANCIAL INSTRUMENTS, OFF-BALANCE SHEET RISKS AND CONTINGENCIES (Additional Information) (Details)</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/FinancialHighlightsPerUnitPerformanceDataAndOtherSupplementalFinancialDataDetails" id="FinancialHighlightsPerUnitPerformanceDataAndOtherSupplementalFinancialDataDetails">
        <link:definition>127 - Disclosure - FINANCIAL HIGHLIGHTS (Per Unit Performance Data and Other Supplemental Financial Data) (Details)</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/FairValueOfFinancialInstrumentsValuationOfSecuritiesUsingFairValueHierarchyDetails" id="FairValueOfFinancialInstrumentsValuationOfSecuritiesUsingFairValueHierarchyDetails">
        <link:definition>128 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS (Valuation of Securities Using Fair Value Hierarchy) (Details)</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/FairValueOfFinancialInstrumentsFairValueOfDerivativeInstrumentsDetails" id="FairValueOfFinancialInstrumentsFairValueOfDerivativeInstrumentsDetails">
        <link:definition>129 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS (Fair Value of Derivative Instruments) (Details)</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:roleType roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/FairValueOfFinancialInstrumentsEffectOfDerivativeInstrumentsOnCondensedStatementsOfOperationsDetails" id="FairValueOfFinancialInstrumentsEffectOfDerivativeInstrumentsOnCondensedStatementsOfOperationsDetails">
        <link:definition>130 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS (Effect of Derivative Instruments on Condensed Statements of Operations) (Details)</link:definition>

        <link:usedOn>link:presentationLink</link:usedOn>

        <link:usedOn>link:definitionLink</link:usedOn>

        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>

      <link:linkbaseRef xlink:type="simple" xlink:href="unl-20160930_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />

      <link:linkbaseRef xlink:type="simple" xlink:href="unl-20160930_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />

      <link:linkbaseRef xlink:type="simple" xlink:href="unl-20160930_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />

      <link:linkbaseRef xlink:type="simple" xlink:href="unl-20160930_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
    </appinfo>
  </annotation>

  <import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />

  <import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" />

  <import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" />

  <import namespace="http://fasb.org/us-gaap/2016-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd" />

  <import namespace="http://xbrl.sec.gov/invest/2013-01-31" schemaLocation="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd" />

  <import namespace="http://xbrl.sec.gov/country/2016-01-31" schemaLocation="http://xbrl.sec.gov/country/2016/country-2016-01-31.xsd" />

  <import namespace="http://xbrl.sec.gov/currency/2016-01-31" schemaLocation="http://xbrl.sec.gov/currency/2016/currency-2016-01-31.xsd" />

  <import namespace="http://xbrl.sec.gov/exch/2016-01-31" schemaLocation="http://xbrl.sec.gov/exch/2016/exch-2016-01-31.xsd" />

  <import namespace="http://xbrl.sec.gov/naics/2011-01-31" schemaLocation="http://xbrl.sec.gov/naics/2011/naics-2011-01-31.xsd" />

  <import namespace="http://xbrl.sec.gov/sic/2011-01-31" schemaLocation="http://xbrl.sec.gov/sic/2011/sic-2011-01-31.xsd" />

  <import namespace="http://xbrl.sec.gov/stpr/2011-01-31" schemaLocation="http://xbrl.sec.gov/stpr/2011/stpr-2011-01-31.xsd" />

  <import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd" />

  <import namespace="http://www.xbrl.org/2009/role/net" schemaLocation="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd" />

  <import namespace="http://www.xbrl.org/2009/arcrole/fact-explanatoryFact" schemaLocation="http://www.xbrl.org/lrr/arcrole/factExplanatory-2009-12-16.xsd" />

  <import namespace="http://xbrl.sec.gov/dei/2014-01-31" schemaLocation="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd" />

  <import namespace="http://www.xbrl.org/dtr/type/numeric" schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd" />

  <import namespace="http://www.xbrl.org/dtr/type/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd" />

  <import namespace="http://fasb.org/us-types/2016-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2016/elts/us-types-2016-01-31.xsd" />

  <element name="DocumentAndEntityInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_DocumentAndEntityInformationAbstract" />

  <element name="FeesPaidByFundAndRelatedPartyTransactionsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_FeesPaidByFundAndRelatedPartyTransactionsAbstract" />

  <element name="FeesPaidAndRelatedPartyTransactionsDisclosureTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_FeesPaidAndRelatedPartyTransactionsDisclosureTextBlock" />

  <element name="FinancialInstrumentsOffBalanceSheetRisksAndContingenciesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_FinancialInstrumentsOffBalanceSheetRisksAndContingenciesAbstract" />

  <element name="DisclosureOfFairValueOffBalanceSheetRisksTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_DisclosureOfFairValueOffBalanceSheetRisksTextBlock" />

  <element name="FinancialHighlightsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_FinancialHighlightsAbstract" />

  <element name="SupplementalFinancialInformationDisclosureTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_SupplementalFinancialInformationDisclosureTextBlock" />

  <element name="NetAssetValuePolicyTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_NetAssetValuePolicyTextBlock" />

  <element name="EarningsPerUnitPolicyTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_EarningsPerUnitPolicyTextBlock" />

  <element name="OtherOperatingIncomeExpensePolicyTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_OtherOperatingIncomeExpensePolicyTextBlock" />

  <element name="BrokerageCommissionsTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_BrokerageCommissionsTableTextBlock" />

  <element name="PerUnitPerformanceDataAndOtherSupplementalFinancialDataTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_PerUnitPerformanceDataAndOtherSupplementalFinancialDataTableTextBlock" />

  <element name="UnrealizedGainLossOnOpenCommodityFuturesContracts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" xbrli:balance="credit" substitutionGroup="xbrli:item" id="unl_UnrealizedGainLossOnOpenCommodityFuturesContracts" />

  <element name="LicenseFeesPayableCurrentAndNoncurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" xbrli:balance="credit" substitutionGroup="xbrli:item" id="unl_LicenseFeesPayableCurrentAndNoncurrent" />

  <element name="NetAssetValuePerUnit" type="num:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="unl_NetAssetValuePerUnit" />

  <element name="MarketValuePerUnit" type="num:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="unl_MarketValuePerUnit" />

  <element name="DisclosureOrganizationAndBusinessAdditionalInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_DisclosureOrganizationAndBusinessAdditionalInformationAbstract" />

  <element name="OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="unl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTable" />

  <element name="PeriodAxis" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:dimensionItem" id="unl_PeriodAxis" />

  <element name="PeriodDomain" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_PeriodDomain" />

  <element name="CreationBasketsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_CreationBasketsMember" />

  <element name="OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems" />

  <element name="NumberOfUnitsPerBasket" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_NumberOfUnitsPerBasket" />

  <element name="FeePaidPerOrder" type="us-types:perUnitItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="unl_FeePaidPerOrder" />

  <element name="NumberOfUnitsRegisteredInPeriod" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_NumberOfUnitsRegisteredInPeriod" />

  <element name="UnitsIssuedDuringPeriodUnitsNewIssues" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_UnitsIssuedDuringPeriodUnitsNewIssues" />

  <element name="UnitsIssuedDuringPeriodValueNewIssues" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" xbrli:balance="credit" substitutionGroup="xbrli:item" id="unl_UnitsIssuedDuringPeriodValueNewIssues" />

  <element name="NumberOfRegisteredUnits" type="xbrli:integerItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="unl_NumberOfRegisteredUnits" />

  <element name="DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationAbstract" />

  <element name="SignificantAccountingPoliciesTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="unl_SignificantAccountingPoliciesTable" />

  <element name="RedemptionBasketsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_RedemptionBasketsMember" />

  <element name="SignificantAccountingPoliciesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_SignificantAccountingPoliciesLineItems" />

  <element name="DisclosureFeesPaidByFundAndRelatedPartyTransactionsAdditionalInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_DisclosureFeesPaidByFundAndRelatedPartyTransactionsAdditionalInformationAbstract" />

  <element name="FuturePeriodMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_FuturePeriodMember" />

  <element name="UnitedStates12MonthNaturalGasFundMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_UnitedStates12MonthNaturalGasFundMember" />

  <element name="RelatedPublicFundsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_RelatedPublicFundsMember" />

  <element name="BaseFeePercentage" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_BaseFeePercentage" />

  <element name="BaseAmountForFeePercentage" type="xbrli:stringItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_BaseAmountForFeePercentage" />

  <element name="PercentageOfChangeInCostsAndExpenses" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_PercentageOfChangeInCostsAndExpenses" />

  <element name="ExpenseWaiver" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" xbrli:balance="credit" substitutionGroup="xbrli:item" id="unl_ExpenseWaiver" />

  <element name="RebalancingInvestmentsTransactionMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_RebalancingInvestmentsTransactionMember" />

  <element name="CreationAndRedemptionActivityMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_CreationAndRedemptionActivityMember" />

  <element name="PercentageOfAverageDailyNetAssets" type="num:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="unl_PercentageOfAverageDailyNetAssets" />

  <element name="DisclosureContractsAndAgreementsAdditionalInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_DisclosureContractsAndAgreementsAdditionalInformationAbstract" />

  <element name="MarketingAgreementMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_MarketingAgreementMember" />

  <element name="GroupFourMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_GroupFourMember" />

  <element name="GroupFiveMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_GroupFiveMember" />

  <element name="GroupSixMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_GroupSixMember" />

  <element name="GroupSevenMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_GroupSevenMember" />

  <element name="GroupEightMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_GroupEightMember" />

  <element name="BasisAmountForFeePercentage" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" xbrli:balance="credit" substitutionGroup="xbrli:item" id="unl_BasisAmountForFeePercentage" />

  <element name="TransactionFeesPaid" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" xbrli:balance="credit" substitutionGroup="xbrli:item" id="unl_TransactionFeesPaid" />

  <element name="CommissionsPaid" type="us-types:perUnitItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_CommissionsPaid" />

  <element name="DisclosureFinancialInstrumentsOffBalanceSheetRisksAndContingenciesAdditionalInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_DisclosureFinancialInstrumentsOffBalanceSheetRisksAndContingenciesAdditionalInformationAbstract" />

  <element name="CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="unl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesTable" />

  <element name="CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesLineItems" />

  <element name="DisclosurePerUnitPerformanceDataAndOtherSupplementalFinancialDataAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_DisclosurePerUnitPerformanceDataAndOtherSupplementalFinancialDataAbstract" />

  <element name="TotalIncomeLossPerUnit" type="num:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_TotalIncomeLossPerUnit" />

  <element name="TotalExpensesPerUnit" type="num:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_TotalExpensesPerUnit" />

  <element name="IncreaseDecreaseInNetAssetValuePerUnit" type="num:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_IncreaseDecreaseInNetAssetValuePerUnit" />

  <element name="RateOfReturnOnAverageAsset" type="num:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="unl_RateOfReturnOnAverageAsset" />

  <element name="AverageNetAssetsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_AverageNetAssetsAbstract" />

  <element name="PercentageOfTotalRevenue" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_PercentageOfTotalRevenue" />

  <element name="ManagementIncentiveFeePercentage" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_ManagementIncentiveFeePercentage" />

  <element name="ExpensesExcludingManagementFeePercentage" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_ExpensesExcludingManagementFeePercentage" />

  <element name="PercentageWaiverExpense" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_PercentageWaiverExpense" />

  <element name="ExpenseExcludingManagementFeePercentageNet" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_ExpenseExcludingManagementFeePercentageNet" />

  <element name="PercentageOfConsolidatedNetIncome" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_PercentageOfConsolidatedNetIncome" />

  <element name="DisclosureValuationOfSecuritiesUsingFairValueHierarchyAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_DisclosureValuationOfSecuritiesUsingFairValueHierarchyAbstract" />

  <element name="DisclosureFairValueOfDerivativeInstrumentsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_DisclosureFairValueOfDerivativeInstrumentsAbstract" />

  <element name="StatementCondensedScheduleOfInvestmentsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_StatementCondensedScheduleOfInvestmentsAbstract" />

  <element name="OpenFuturesContractsLongMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_OpenFuturesContractsLongMember" />

  <element name="NymexNaturalGasFuturesNgOneMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_NymexNaturalGasFuturesNgOneMember" />

  <element name="NymexNaturalGasFuturesNgTwoMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_NymexNaturalGasFuturesNgTwoMember" />

  <element name="NymexNaturalGasFuturesNgThreeMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_NymexNaturalGasFuturesNgThreeMember" />

  <element name="NymexNaturalGasFuturesNgFourMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_NymexNaturalGasFuturesNgFourMember" />

  <element name="NymexNaturalGasFuturesNgFiveMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_NymexNaturalGasFuturesNgFiveMember" />

  <element name="NymexNaturalGasFuturesNgSixMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_NymexNaturalGasFuturesNgSixMember" />

  <element name="NymexNaturalGasFuturesNgSevenMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_NymexNaturalGasFuturesNgSevenMember" />

  <element name="NymexNaturalGasFuturesNgEightMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_NymexNaturalGasFuturesNgEightMember" />

  <element name="NymexNaturalGasFuturesNgNineMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_NymexNaturalGasFuturesNgNineMember" />

  <element name="NymexNaturalGasFuturesNgTenMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_NymexNaturalGasFuturesNgTenMember" />

  <element name="NymexNaturalGasFuturesNgElevenMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_NymexNaturalGasFuturesNgElevenMember" />

  <element name="NymexNaturalGasFuturesNgTwelveMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_NymexNaturalGasFuturesNgTwelveMember" />

  <element name="FidelityInstitutionalMoneyMarketFundsGovernmentPortfolioMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_FidelityInstitutionalMoneyMarketFundsGovernmentPortfolioMember" />

  <element name="UnrealizedGainLossOnOpenCommodityFuturesAndClearedSwapContracts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" xbrli:balance="debit" substitutionGroup="xbrli:item" id="unl_UnrealizedGainLossOnOpenCommodityFuturesAndClearedSwapContracts" />

  <element name="PercentageOfPartnersCapital" type="num:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="unl_PercentageOfPartnersCapital" />

  <element name="DisclosureEffectOfDerivativeInstrumentsOnCondensedStatementsOfOperationsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_DisclosureEffectOfDerivativeInstrumentsOnCondensedStatementsOfOperationsAbstract" />

  <element name="DerivativeNatureAxis" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:dimensionItem" id="unl_DerivativeNatureAxis" />

  <element name="DerivativeNatureDomain" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_DerivativeNatureDomain" />

  <element name="ClosedPositionsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_ClosedPositionsMember" />

  <element name="OpenPositionMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_OpenPositionMember" />

  <element name="InvestmentSecuritiesSeriesOneAxis" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:dimensionItem" id="unl_InvestmentSecuritiesSeriesOneAxis" />

  <element name="GainLossOnCommodityFuturesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_GainLossOnCommodityFuturesAbstract" />

  <element name="NetOperatingExpenses" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" xbrli:balance="debit" substitutionGroup="xbrli:item" id="unl_NetOperatingExpenses" />

  <element name="IncreaseDecreaseInDirectorsFeeReceivable" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" xbrli:balance="debit" substitutionGroup="xbrli:item" id="unl_IncreaseDecreaseInDirectorsFeeReceivable" />

  <element name="IncreaseDecreaseManagementFeesPayable" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" xbrli:balance="debit" substitutionGroup="xbrli:item" id="unl_IncreaseDecreaseManagementFeesPayable" />

  <element name="IncreaseDecreaseInProfessionalFeesPayable" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" xbrli:balance="debit" substitutionGroup="xbrli:item" id="unl_IncreaseDecreaseInProfessionalFeesPayable" />

  <element name="PaymentsToPartnershipRedemption" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" xbrli:balance="credit" substitutionGroup="xbrli:item" id="unl_PaymentsToPartnershipRedemption" />

  <element name="IncreaseDecreaseInLicenseFeesPayable" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" xbrli:balance="debit" substitutionGroup="xbrli:item" id="unl_IncreaseDecreaseInLicenseFeesPayable" />

  <element name="NetAssetValuePerUnitAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_NetAssetValuePerUnitAbstract" />

  <element name="MaximumAggregateCompensationPaidForDistributionRelatedServices" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_MaximumAggregateCompensationPaidForDistributionRelatedServices" />

  <element name="MarketingAgentAndAffliateOfUscfMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_MarketingAgentAndAffliateOfUscfMember" />

  <element name="FeesPaidAndRelatedPartyTransactionsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_FeesPaidAndRelatedPartyTransactionsLineItems" />

  <element name="GoldmanSachsFinancialSquareFundsGovernmentFundClassFsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_GoldmanSachsFinancialSquareFundsGovernmentFundClassFsMember" />

  <element name="MorganStanleyInstitutionalLiquidityFundGovernmentPortfolioMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_MorganStanleyInstitutionalLiquidityFundGovernmentPortfolioMember" />

  <element name="InvestmentSecuritiesSeriesOneDomain" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_InvestmentSecuritiesSeriesOneDomain" />

  <element name="UsTreasuryBillsOneMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_UsTreasuryBillsOneMember" />

  <element name="UsTreasuryBillsTwoMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_UsTreasuryBillsTwoMember" />

  <element name="UsTreasuryBillsThreeMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_UsTreasuryBillsThreeMember" />

  <element name="UsTreasuryBillsFourMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_UsTreasuryBillsFourMember" />

  <element name="UsTreasuryBillsFiveMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_UsTreasuryBillsFiveMember" />

  <element name="UsTreasuryBillsSixMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_UsTreasuryBillsSixMember" />

  <element name="UsTreasuryBillsSevenMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_UsTreasuryBillsSevenMember" />

  <element name="UsTreasuryBillsEightMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_UsTreasuryBillsEightMember" />

  <element name="UsTreasuryBillsNineMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_UsTreasuryBillsNineMember" />

  <element name="UsTreasuryBillsTenMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_UsTreasuryBillsTenMember" />

  <element name="UsTreasuryBillsElevenMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_UsTreasuryBillsElevenMember" />

  <element name="UsTreasuryBillsTwevleMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_UsTreasuryBillsTwevleMember" />

  <element name="UsTreasuryBillsThirteenMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_UsTreasuryBillsThirteenMember" />

  <element name="UsTreasuryBillsFourteenMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_UsTreasuryBillsFourteenMember" />

  <element name="UsTreasuryBillsFifteenMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_UsTreasuryBillsFifteenMember" />

  <element name="UsTreasuryBillsSixteenMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_UsTreasuryBillsSixteenMember" />

  <element name="UsTreasuryBillsSeventeenMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_UsTreasuryBillsSeventeenMember" />

  <element name="UsTreasuryBillsEighteenMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_UsTreasuryBillsEighteenMember" />

  <element name="UsTreasuryBillsNineteenMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="unl_UsTreasuryBillsNineteenMember" />
</schema>

