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<link:usedOn>link:definitionLink</link:usedOn></link:roleType>
<link:roleType
roleURI="http://vanguard/role/Supplement"
id="Supplement">
<link:definition>0000000 - Document - Supplement</link:definition>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn></link:roleType></xs:appinfo></xs:annotation>
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<xs:import
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<xs:import
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id="vanguard_S000002594Member"
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xbrli:periodType="duration"
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<xs:element
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nillable="true"/>
<xs:element
name="S000002593Member"
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type="us-types:domainItemType"
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xbrli:periodType="duration"
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<xs:element
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id="vanguard_S000012432Member"
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xbrli:periodType="duration"
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xbrli:periodType="duration"/>
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<xs:element
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<xs:element
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<xs:element
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type="us-types:domainItemType"
substitutionGroup="xbrli:item"
xbrli:periodType="duration"
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<xs:element
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id="vanguard_ComparativeBenchmark"
name="ComparativeBenchmark"
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xbrli:periodType="duration"/>
<xs:element
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nillable="true"
substitutionGroup="xbrli:item"
name="AquiredFundFeesExpensesExcludingAFFE"
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