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	<xs:annotation>
		<xs:appinfo>
			<link:linkbaseRef xlink:type="simple" xlink:href="c485bpos-20260518_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="c485bpos-20260518_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="c485bpos-20260518_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
			<link:roleType roleURI="http://www.MFS.com/20260430/role/DocumentAndEntityInformation1" id="DocumentAndEntityInformation1">
				<link:definition>010000 - Document - Document and Entity Information {Elements}</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.MFS.com/20260430/role/RRDetailData2" id="RRDetailData2">
				<link:definition>020102 - Disclosure - Risk/Return Detail Data (MFS Lifetime 2070 Fund) {Elements}</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.MFS.com/20260430/role/RRRiskTable3" id="RRRiskTable3">
				<link:definition>020101 - Schedule - Risk Table {Transposed}</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.MFS.com/20260430/role/RRCustomRiskRole4" id="RRCustomRiskRole4">
				<link:definition>010004 - Schedule - Investment Risks {Unlabeled}</link:definition>
				<link:usedOn>link:presentationLink</link:usedOn>
				<link:usedOn>link:calculationLink</link:usedOn>
				<link:usedOn>link:definitionLink</link:usedOn>
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	<xs:element name="AllocationRisk2Member" id="cik0001330967_AllocationRisk2Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
	<xs:element name="UnderlyingFundsRisk2Member" id="cik0001330967_UnderlyingFundsRisk2Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
	<xs:element name="InvestmentSelectionRisk2Member" id="cik0001330967_InvestmentSelectionRisk2Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
	<xs:element name="EquityMarketRiskCompanyRisk2Member" id="cik0001330967_EquityMarketRiskCompanyRisk2Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
	<xs:element name="GrowthCompanyRisk2Member" id="cik0001330967_GrowthCompanyRisk2Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
	<xs:element name="ValueCompanyRisk2Member" id="cik0001330967_ValueCompanyRisk2Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
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	<xs:element name="InterestRateRisk2Member" id="cik0001330967_InterestRateRisk2Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
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	<xs:element name="PrepaymentExtensionRisk2Member" id="cik0001330967_PrepaymentExtensionRisk2Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
	<xs:element name="Inflation-AdjustedDebtInstrumentsRisk2Member" id="cik0001330967_Inflation-AdjustedDebtInstrumentsRisk2Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
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	<xs:element name="When-IssuedDelayedDeliveryandForwardCommitmentTransactionRisk2Member" id="cik0001330967_When-IssuedDelayedDeliveryandForwardCommitmentTransactionRisk2Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
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	<xs:element name="LeveragingRisk2Member" id="cik0001330967_LeveragingRisk2Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
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