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<link:roleType
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<link:definition>0 - Schedule -  (Vanguard Consumer Discretionary Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000004446Retail"
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<link:definition>1 - Schedule -  (Vanguard Consumer Discretionary Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000004447ETF"
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<link:definition>2 - Schedule -  (Vanguard Consumer Staples Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000004447Retail"
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<link:definition>3 - Schedule -  (Vanguard Consumer Staples Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000004448ETF"
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<link:definition>4 - Schedule -  (Vanguard Energy Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>5 - Schedule -  (Vanguard Energy Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000018789ETF"
id="S000018789ETF">
<link:definition>6 - Schedule -  (Vanguard Extended Duration Treasury Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000018789Institutional"
id="S000018789Institutional">
<link:definition>7 - Schedule -  (Vanguard Extended Duration Treasury Index Fund Institutional)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000004449ETF"
id="S000004449ETF">
<link:definition>8 - Schedule -  (Vanguard Financials Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000004449Retail"
id="S000004449Retail">
<link:definition>9 - Schedule -  (Vanguard Financials Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000004440Institutional"
id="S000004440Institutional">
<link:definition>10 - Schedule -  (Vanguard FTSE Social Index Fund Institutional)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000004440Participant"
id="S000004440Participant">
<link:definition>11 - Schedule -  (Vanguard FTSE Social Index Fund Participant)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000004440Retail"
id="S000004440Retail">
<link:definition>12 - Schedule -  (Vanguard FTSE Social Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000004450ETF"
id="S000004450ETF">
<link:definition>13 - Schedule -  (Vanguard Health Care Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000004450Retail"
id="S000004450Retail">
<link:definition>14 - Schedule -  (Vanguard Health Care Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000004451ETF"
id="S000004451ETF">
<link:definition>15 - Schedule -  (Vanguard Industrials Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000004451Retail"
id="S000004451Retail">
<link:definition>16 - Schedule -  (Vanguard Industrials Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000004452ETF"
id="S000004452ETF">
<link:definition>17 - Schedule -  (Vanguard Information Technology Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000004452Retail"
id="S000004452Retail">
<link:definition>18 - Schedule -  (Vanguard Information Technology Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000004453Participant"
id="S000004453Participant">
<link:definition>19 - Schedule -  (Vanguard International Growth Fund Participant)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000004453Participant2"
id="S000004453Participant2">
<link:definition>20 - Schedule -  (Vanguard International Growth Fund Participant:)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000004453Retail"
id="S000004453Retail">
<link:definition>21 - Schedule -  (Vanguard International Growth Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000004441ETF"
id="S000004441ETF">
<link:definition>22 - Schedule -  (Vanguard Materials Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000004441Retail"
id="S000004441Retail">
<link:definition>23 - Schedule -  (Vanguard Materials Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000019700ETF"
id="S000019700ETF">
<link:definition>24 - Schedule -  (Vanguard Mega Cap 300 Growth Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000019700Institutional"
id="S000019700Institutional">
<link:definition>25 - Schedule -  (Vanguard Mega Cap 300 Growth Index Fund Institutional)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000019698ETF"
id="S000019698ETF">
<link:definition>26 - Schedule -  (Vanguard Mega Cap 300 Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000019698Institutional"
id="S000019698Institutional">
<link:definition>27 - Schedule -  (Vanguard Mega Cap 300 Index Fund Institutional)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000019699ETF"
id="S000019699ETF">
<link:definition>28 - Schedule -  (Vanguard Mega Cap 300 Value Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000019699Institutional"
id="S000019699Institutional">
<link:definition>29 - Schedule -  (Vanguard Mega Cap 300 Value Index Fund Institutional)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000004443ETF"
id="S000004443ETF">
<link:definition>30 - Schedule -  (Vanguard Telecommunication Services Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000004443Retail"
id="S000004443Retail">
<link:definition>31 - Schedule -  (Vanguard Telecommunication Services Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000004444Participant"
id="S000004444Participant">
<link:definition>32 - Schedule -  (Vanguard U.S. Growth Fund Participant)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000004444Participant2"
id="S000004444Participant2">
<link:definition>33 - Schedule -  (Vanguard U.S. Growth Fund Participant:)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000004444Retail"
id="S000004444Retail">
<link:definition>34 - Schedule -  (Vanguard U.S. Growth Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000004445ETF"
id="S000004445ETF">
<link:definition>35 - Schedule -  (Vanguard Utilities Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/S000004445Retail"
id="S000004445Retail">
<link:definition>36 - Schedule -  (Vanguard Utilities Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn></link:roleType>
<link:roleType
id="S000004444OperatingExpensesRetail"
roleURI="http://vanguard/role/S000004444OperatingExpensesRetail">
<link:definition>2064536 - Schedule - Annual Fund Operating Expenses  (Vanguard U.S. Growth Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000004444ExpenseExampleNoRedemptionRetail"
roleURI="http://vanguard/role/S000004444ExpenseExampleNoRedemptionRetail">
<link:definition>2064539 - Schedule - Expense Example, No Redemption {Transposed} (Vanguard U.S. Growth Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000004444ShareholderFeesRetail"
roleURI="http://vanguard/role/S000004444ShareholderFeesRetail">
<link:definition>2064543 - Schedule - Shareholder Fees (Vanguard U.S. Growth Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000004444PerformanceRetail"
roleURI="http://vanguard/role/S000004444PerformanceTableDataRetail">
<link:definition>2064551 - Schedule - Average Annual Total Returns (Vanguard U.S. Growth Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000004444ExpenseExampleNoRedemptionParticipant"
roleURI="http://vanguard/role/S000004444ExpenseExampleNoRedemptionParticipant">
<link:definition>2064561 - Schedule - Expense Example, No Redemption {Transposed} (Vanguard U.S. Growth Fund Participant)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000004444ShareholderFeesParticipant"
roleURI="http://vanguard/role/S000004444ShareholderFeesParticipant">
<link:definition>2064569 - Schedule - Shareholder Fees (Vanguard U.S. Growth Fund Participant)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000004444OperatingExpensesParticipant"
roleURI="http://vanguard/role/S000004444OperatingExpensesParticipant">
<link:definition>2064570 - Schedule - Annual Fund Operating Expenses  (Vanguard U.S. Growth Fund Participant)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000004444PerformanceParticipant"
roleURI="http://vanguard/role/S000004444PerformanceTableDataParticipant">
<link:definition>2064576 - Schedule - Average Annual Total Returns (Vanguard U.S. Growth Fund Participant)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000004444ExpenseExampleNoRedemptionParticipant2"
roleURI="http://vanguard/role/S000004444ExpenseExampleNoRedemptionParticipant2">
<link:definition>2064593 - Schedule - Expense Example, No Redemption {Transposed} (Vanguard U.S. Growth Fund Participant:)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000004444ShareholderFeesParticipant2"
roleURI="http://vanguard/role/S000004444ShareholderFeesParticipant2">
<link:definition>2064599 - Schedule - Shareholder Fees (Vanguard U.S. Growth Fund Participant:)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000004444OperatingExpensesParticipant2"
roleURI="http://vanguard/role/S000004444OperatingExpensesParticipant2">
<link:definition>2064606 - Schedule - Annual Fund Operating Expenses  (Vanguard U.S. Growth Fund Participant:)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000004444PerformanceParticipant2"
roleURI="http://vanguard/role/S000004444PerformanceTableDataParticipant2">
<link:definition>2064608 - Schedule - Average Annual Total Returns (Vanguard U.S. Growth Fund Participant:)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000018789ShareholderFeesInstitutional"
roleURI="http://vanguard/role/S000018789ShareholderFeesInstitutional">
<link:definition>2065040 - Schedule - Shareholder Fees (Vanguard Extended Duration Treasury Index Fund Institutional)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000018789ExpenseExampleNoRedemptionInstitutional"
roleURI="http://vanguard/role/S000018789ExpenseExampleNoRedemptionInstitutional">
<link:definition>2065050 - Schedule - Expense Example, No Redemption {Transposed} (Vanguard Extended Duration Treasury Index Fund Institutional)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000018789PerformanceInstitutional"
roleURI="http://vanguard/role/S000018789PerformanceTableDataInstitutional">
<link:definition>2065051 - Schedule - Average Annual Total Returns (Vanguard Extended Duration Treasury Index Fund Institutional)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000018789OperatingExpensesInstitutional"
roleURI="http://vanguard/role/S000018789OperatingExpensesInstitutional">
<link:definition>2065053 - Schedule - Annual Fund Operating Expenses  (Vanguard Extended Duration Treasury Index Fund Institutional)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000018789OperatingExpensesETF"
roleURI="http://vanguard/role/S000018789OperatingExpensesETF">
<link:definition>2065061 - Schedule - Annual Fund Operating Expenses  (Vanguard Extended Duration Treasury Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000018789PerformanceETF"
roleURI="http://vanguard/role/S000018789PerformanceTableDataETF">
<link:definition>2065069 - Schedule - Average Annual Total Returns (Vanguard Extended Duration Treasury Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000018789ShareholderFeesETF"
roleURI="http://vanguard/role/S000018789ShareholderFeesETF">
<link:definition>2065074 - Schedule - Shareholder Fees (Vanguard Extended Duration Treasury Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000018789ExpenseExampleNoRedemptionETF"
roleURI="http://vanguard/role/S000018789ExpenseExampleNoRedemptionETF">
<link:definition>2065083 - Schedule - Expense Example, No Redemption {Transposed} (Vanguard Extended Duration Treasury Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2065090 - Schedule - Average Annual Total Returns (Vanguard Mega Cap 300 Index Fund Institutional)</link:definition>
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<link:definition>2065099 - Schedule - Shareholder Fees (Vanguard Mega Cap 300 Index Fund Institutional)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
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<link:definition>2065106 - Schedule - Expense Example, No Redemption {Transposed} (Vanguard Mega Cap 300 Index Fund Institutional)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:definition>2065111 - Schedule - Expense Example, No Redemption {Transposed} (Vanguard Mega Cap 300 Growth Index Fund Institutional)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
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<link:roleType
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<link:definition>2065113 - Schedule - Annual Fund Operating Expenses  (Vanguard Mega Cap 300 Growth Index Fund Institutional)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
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<link:roleType
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<link:definition>2065116 - Schedule - Shareholder Fees (Vanguard Mega Cap 300 Growth Index Fund Institutional)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2065139 - Schedule - Average Annual Total Returns (Vanguard Mega Cap 300 Value Index Fund Institutional)</link:definition>
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<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000019699ShareholderFeesInstitutional"
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<link:definition>2065145 - Schedule - Shareholder Fees (Vanguard Mega Cap 300 Value Index Fund Institutional)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000019699OperatingExpensesInstitutional"
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<link:definition>2065146 - Schedule - Annual Fund Operating Expenses  (Vanguard Mega Cap 300 Value Index Fund Institutional)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
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<link:definition>2065147 - Schedule - Expense Example, No Redemption {Transposed} (Vanguard Mega Cap 300 Value Index Fund Institutional)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
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<link:roleType
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<link:definition>2065162 - Schedule - Average Annual Total Returns (Vanguard Mega Cap 300 Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
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<link:roleType
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<link:definition>2065165 - Schedule - Annual Fund Operating Expenses  (Vanguard Mega Cap 300 Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
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<link:definition>2065166 - Schedule - Expense Example, No Redemption {Transposed} (Vanguard Mega Cap 300 Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000019698ShareholderFeesETF"
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<link:definition>2065170 - Schedule - Shareholder Fees (Vanguard Mega Cap 300 Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000019700ShareholderFeesETF"
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<link:definition>2065183 - Schedule - Shareholder Fees (Vanguard Mega Cap 300 Growth Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000019700OperatingExpensesETF"
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<link:definition>2065184 - Schedule - Annual Fund Operating Expenses  (Vanguard Mega Cap 300 Growth Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000019700ExpenseExampleNoRedemptionETF"
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<link:definition>2065193 - Schedule - Expense Example, No Redemption {Transposed} (Vanguard Mega Cap 300 Growth Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2065198 - Schedule - Average Annual Total Returns (Vanguard Mega Cap 300 Growth Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000019699ShareholderFeesETF"
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<link:definition>2065212 - Schedule - Shareholder Fees (Vanguard Mega Cap 300 Value Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2065214 - Schedule - Average Annual Total Returns (Vanguard Mega Cap 300 Value Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2065216 - Schedule - Annual Fund Operating Expenses  (Vanguard Mega Cap 300 Value Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
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<link:definition>2065217 - Schedule - Expense Example, No Redemption {Transposed} (Vanguard Mega Cap 300 Value Index Fund ETF)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000004453ShareholderFeesRetail"
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<link:definition>2065249 - Schedule - Shareholder Fees (Vanguard International Growth Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000004453OperatingExpensesRetail"
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<link:definition>2065250 - Schedule - Annual Fund Operating Expenses  (Vanguard International Growth Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2065257 - Schedule - Average Annual Total Returns (Vanguard International Growth Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2065261 - Schedule - Expense Example, No Redemption {Transposed} (Vanguard International Growth Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2065268 - Schedule - Average Annual Total Returns (Vanguard International Growth Fund Participant)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000004453OperatingExpensesParticipant"
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<link:definition>2065274 - Schedule - Annual Fund Operating Expenses  (Vanguard International Growth Fund Participant)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
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<link:roleType
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<link:definition>2065275 - Schedule - Expense Example, No Redemption {Transposed} (Vanguard International Growth Fund Participant)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType
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<link:definition>2065279 - Schedule - Shareholder Fees (Vanguard International Growth Fund Participant)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2065293 - Schedule - Average Annual Total Returns (Vanguard International Growth Fund Participant:)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2065303 - Schedule - Shareholder Fees (Vanguard International Growth Fund Participant:)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2065304 - Schedule - Annual Fund Operating Expenses  (Vanguard International Growth Fund Participant:)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2065313 - Schedule - Expense Example, No Redemption {Transposed} (Vanguard International Growth Fund Participant:)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2069493 - Schedule - Average Annual Total Returns (Vanguard Consumer Discretionary Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2069499 - Schedule - Expense Example, No Redemption {Transposed} (Vanguard Consumer Discretionary Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2069501 - Schedule - Shareholder Fees (Vanguard Consumer Discretionary Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2069502 - Schedule - Annual Fund Operating Expenses  (Vanguard Consumer Discretionary Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2069508 - Schedule - Expense Example, No Redemption {Transposed} (Vanguard Consumer Staples Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2069517 - Schedule - Annual Fund Operating Expenses  (Vanguard Consumer Staples Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2069518 - Schedule - Shareholder Fees (Vanguard Consumer Staples Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2069525 - Schedule - Average Annual Total Returns (Vanguard Consumer Staples Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2069540 - Schedule - Average Annual Total Returns (Vanguard Energy Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2069543 - Schedule - Annual Fund Operating Expenses  (Vanguard Energy Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2069544 - Schedule - Expense Example, No Redemption {Transposed} (Vanguard Energy Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2069548 - Schedule - Shareholder Fees (Vanguard Energy Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2069558 - Schedule - Annual Fund Operating Expenses  (Vanguard Financials Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2069569 - Schedule - Average Annual Total Returns (Vanguard Financials Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2069574 - Schedule - Expense Example, No Redemption {Transposed} (Vanguard Financials Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000004449ShareholderFeesRetail"
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<link:definition>2069577 - Schedule - Shareholder Fees (Vanguard Financials Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2069586 - Schedule - Expense Example, No Redemption {Transposed} (Vanguard Health Care Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2069590 - Schedule - Shareholder Fees (Vanguard Health Care Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2069595 - Schedule - Annual Fund Operating Expenses  (Vanguard Health Care Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2069601 - Schedule - Average Annual Total Returns (Vanguard Health Care Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
id="S000004451ShareholderFeesRetail"
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<link:definition>2069613 - Schedule - Shareholder Fees (Vanguard Industrials Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2069619 - Schedule - Expense Example, No Redemption {Transposed} (Vanguard Industrials Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
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<link:definition>2069624 - Schedule - Average Annual Total Returns (Vanguard Industrials Index Fund Retail)</link:definition>
<link:usedOn>link:calculationLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
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<link:definition>2069649 - Schedule - Shareholder Fees (Vanguard Information Technology Index Fund Retail)</link:definition>
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<link:definition>2069671 - Schedule - Shareholder Fees (Vanguard Materials Index Fund Retail)</link:definition>
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<link:definition>2069681 - Schedule - Expense Example, No Redemption {Transposed} (Vanguard Materials Index Fund Retail)</link:definition>
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<link:definition>2069720 - Schedule - Average Annual Total Returns (Vanguard Utilities Index Fund Retail)</link:definition>
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<link:definition>2069724 - Schedule - Expense Example, No Redemption {Transposed} (Vanguard Utilities Index Fund Retail)</link:definition>
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<link:definition>2069734 - Schedule - Expense Example, No Redemption {Transposed} (Vanguard Consumer Discretionary Index Fund ETF)</link:definition>
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<link:definition>2069739 - Schedule - Annual Fund Operating Expenses  (Vanguard Consumer Discretionary Index Fund ETF)</link:definition>
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<link:definition>2069743 - Schedule - Shareholder Fees (Vanguard Consumer Discretionary Index Fund ETF)</link:definition>
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<link:definition>2069746 - Schedule - Average Annual Total Returns (Vanguard Consumer Discretionary Index Fund ETF)</link:definition>
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<link:definition>2069778 - Schedule - Annual Fund Operating Expenses  (Vanguard Energy Index Fund ETF)</link:definition>
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<link:definition>2069792 - Schedule - Expense Example, No Redemption {Transposed} (Vanguard Financials Index Fund ETF)</link:definition>
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<link:definition>2069793 - Schedule - Annual Fund Operating Expenses  (Vanguard Financials Index Fund ETF)</link:definition>
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<link:roleType
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<link:definition>2069822 - Schedule - Shareholder Fees (Vanguard Energy Index Fund ETF)</link:definition>
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<link:usedOn>link:presentationLink</link:usedOn>
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<link:roleType
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<link:definition>2069830 - Schedule - Shareholder Fees (Vanguard Consumer Staples Index Fund ETF)</link:definition>
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<link:definition>2069881 - Schedule - Average Annual Total Returns (Vanguard Industrials Index Fund ETF)</link:definition>
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<link:usedOn>link:calculationLink</link:usedOn>
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<link:definition>2069964 - Schedule - Average Annual Total Returns (Vanguard Utilities Index Fund ETF)</link:definition>
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<link:definition>2069985 - Schedule - Shareholder Fees (Vanguard Information Technology Index Fund ETF)</link:definition>
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<link:definition>2070011 - Schedule - Average Annual Total Returns (Vanguard Materials Index Fund ETF)</link:definition>
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