<?xml version="1.0" encoding="us-ascii"?>
<!--XBRL document created by RR Donnelley IM Processor 5.0.0.0 using Fujitsu Interstage XWand-->
<schema targetNamespace="http://www.dimensional.com/20121022" elementFormDefault="qualified" xmlns="http://www.w3.org/2001/XMLSchema" xmlns:didgi="http://www.dimensional.com/20121022" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric">
  <annotation>
    <appinfo>
      <link:linkbaseRef xlink:type="simple" xlink:href="didgi-20121022_pre.xml" xlink:title="Presentation Links, all" 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="didgi-20121022_cal.xml" xlink:title="Calculation Links, all" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:linkbaseRef xlink:type="simple" xlink:href="didgi-20121022_def.xml" xlink:title="Definition Links, all" 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="didgi-20121022_lab.xml" xlink:title="Label Links, all" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:roleType roleURI="http://www.dimensional.com/role/DocumentDocumentandEntityInformation" id="DocumentDocumentandEntityInformation">
        <link:definition>000000 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.dimensional.com/role/DocumentRiskReturnSummaryUnlabeledInternationalSocialCoreEquityPortfolio" id="DocumentRiskReturnSummaryUnlabeledInternationalSocialCoreEquityPortfolio">
        <link:definition>000011 - Document - Risk/Return Summary {Unlabeled} - International Social Core Equity Portfolio</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.dimensional.com/role/ScheduleShareholderFeesInternationalSocialCoreEquityPortfolio" id="ScheduleShareholderFeesInternationalSocialCoreEquityPortfolio">
        <link:definition>000012 - Schedule - Shareholder Fees {- International Social Core Equity Portfolio}</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.dimensional.com/role/ScheduleAnnualFundOperatingExpensesInternationalSocialCoreEquityPortfolio" id="ScheduleAnnualFundOperatingExpensesInternationalSocialCoreEquityPortfolio">
        <link:definition>000013 - Schedule - Annual Fund Operating Expenses {- International Social Core Equity Portfolio}</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.dimensional.com/role/ScheduleExpenseExampleTransposedInternationalSocialCoreEquityPortfolio" id="ScheduleExpenseExampleTransposedInternationalSocialCoreEquityPortfolio">
        <link:definition>000014 - Schedule - Expense Example {Transposed} {- International Social Core Equity Portfolio}</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.dimensional.com/role/ScheduleExpenseExampleNoRedemptionTransposedInternationalSocialCoreEquityPortfolio" id="ScheduleExpenseExampleNoRedemptionTransposedInternationalSocialCoreEquityPortfolio">
        <link:definition>000015 - Schedule - Expense Example, No Redemption {Transposed} {- International Social Core Equity Portfolio}</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.dimensional.com/role/ScheduleAnnualTotalReturnsInternationalSocialCoreEquityPortfolioBarChart" id="ScheduleAnnualTotalReturnsInternationalSocialCoreEquityPortfolioBarChart">
        <link:definition>000016 - Schedule - Annual Total Returns - International Social Core Equity Portfolio [BarChart]</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.dimensional.com/role/ScheduleAverageAnnualTotalReturnsTransposedInternationalSocialCoreEquityPortfolio" id="ScheduleAverageAnnualTotalReturnsTransposedInternationalSocialCoreEquityPortfolio">
        <link:definition>000017 - Schedule - Average Annual Total Returns {Transposed} {- International Social Core Equity Portfolio}</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.dimensional.com/role/DocumentRiskReturnDetailUnlabeledInternationalSocialCoreEquityPortfolio" id="DocumentRiskReturnDetailUnlabeledInternationalSocialCoreEquityPortfolio">
        <link:definition>000018 - Document - Risk/Return Detail {Unlabeled} - International Social Core Equity Portfolio</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.dimensional.com/role/DisclosureRiskReturnDetailDataElementsInternationalSocialCoreEquityPortfolio" id="DisclosureRiskReturnDetailDataElementsInternationalSocialCoreEquityPortfolio">
        <link:definition>000019 - Disclosure - Risk/Return Detail Data {Elements} - International Social Core Equity Portfolio</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.dimensional.com/role/DocumentRiskReturnSummaryUnlabeledWorldexU.S.TargetedValuePortfolio" id="DocumentRiskReturnSummaryUnlabeledWorldexUSTargetedValuePortfolio">
        <link:definition>000021 - Document - Risk/Return Summary {Unlabeled} - World ex U.S. Targeted Value Portfolio</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.dimensional.com/role/ScheduleShareholderFeesWorldexU.S.TargetedValuePortfolio" id="ScheduleShareholderFeesWorldexUSTargetedValuePortfolio">
        <link:definition>000022 - Schedule - Shareholder Fees {- World ex U.S. Targeted Value Portfolio}</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.dimensional.com/role/ScheduleAnnualFundOperatingExpensesWorldexU.S.TargetedValuePortfolio" id="ScheduleAnnualFundOperatingExpensesWorldexUSTargetedValuePortfolio">
        <link:definition>000023 - Schedule - Annual Fund Operating Expenses {- World ex U.S. Targeted Value Portfolio}</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.dimensional.com/role/ScheduleExpenseExampleTransposedWorldexU.S.TargetedValuePortfolio" id="ScheduleExpenseExampleTransposedWorldexUSTargetedValuePortfolio">
        <link:definition>000024 - Schedule - Expense Example {Transposed} {- World ex U.S. Targeted Value Portfolio}</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.dimensional.com/role/ScheduleExpenseExampleNoRedemptionTransposedWorldexU.S.TargetedValuePortfolio" id="ScheduleExpenseExampleNoRedemptionTransposedWorldexUSTargetedValuePortfolio">
        <link:definition>000025 - Schedule - Expense Example, No Redemption {Transposed} {- World ex U.S. Targeted Value Portfolio}</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.dimensional.com/role/ScheduleAnnualTotalReturnsWorldexU.S.TargetedValuePortfolioBarChart" id="ScheduleAnnualTotalReturnsWorldexUSTargetedValuePortfolioBarChart">
        <link:definition>000026 - Schedule - Annual Total Returns - World ex U.S. Targeted Value Portfolio [BarChart]</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.dimensional.com/role/ScheduleAverageAnnualTotalReturnsTransposedWorldexU.S.TargetedValuePortfolio" id="ScheduleAverageAnnualTotalReturnsTransposedWorldexUSTargetedValuePortfolio">
        <link:definition>000027 - Schedule - Average Annual Total Returns {Transposed} {- World ex U.S. Targeted Value Portfolio}</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.dimensional.com/role/DocumentRiskReturnDetailUnlabeledWorldexU.S.TargetedValuePortfolio" id="DocumentRiskReturnDetailUnlabeledWorldexUSTargetedValuePortfolio">
        <link:definition>000028 - Document - Risk/Return Detail {Unlabeled} - World ex U.S. Targeted Value Portfolio</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.dimensional.com/role/DisclosureRiskReturnDetailDataElementsWorldexU.S.TargetedValuePortfolio" id="DisclosureRiskReturnDetailDataElementsWorldexUSTargetedValuePortfolio">
        <link:definition>000029 - Disclosure - Risk/Return Detail Data {Elements} - World ex U.S. Targeted Value Portfolio</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </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.sec.gov/dei/2012-01-31" schemaLocation="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd" />
  <import namespace="http://xbrl.sec.gov/rr/2012-01-31" schemaLocation="http://xbrl.sec.gov/rr/2012/rr-2012-01-31.xsd" />
  <import namespace="http://www.xbrl.org/dtr/type/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd" />
  <element name="S000038669Member" id="didgi_S000038669Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="C000119189Member" id="didgi_C000119189Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="S000038670Member" id="didgi_S000038670Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="C000119190Member" id="didgi_C000119190Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
</schema>
