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| <xs:element id="algn_DisclosureSegmentInformationAbstract" abstract="true" name="DisclosureSegmentInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/> |
| <xs:element id="algn_LesseeOperatingLeasesNoncashOperatingCosts" abstract="false" name="LesseeOperatingLeasesNoncashOperatingCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="algn_ExocadAcquisitionMember" abstract="true" name="ExocadAcquisitionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/> |
| <xs:element id="algn_ClearAlignerMember" abstract="true" name="ClearAlignerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/> |
| <xs:element id="algn_FiniteLivedIntangibleAssetsNetExcludingCumulativeTranslationAdjustments" abstract="false" name="FiniteLivedIntangibleAssetsNetExcludingCumulativeTranslationAdjustments" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="algn_A2018ASRMember" abstract="true" name="A2018ASRMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/> |
| <xs:element id="algn_PrepaidSoftwareAndMaintenance" abstract="false" name="PrepaidSoftwareAndMaintenance" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="algn_DisclosureChangeInCarryingValueOfGoodwillAbstract" abstract="true" name="DisclosureChangeInCarryingValueOfGoodwillAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/> |
| <xs:element id="algn_May2018RepurchaseMember" abstract="true" name="May2018RepurchaseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/> |
| <xs:element id="algn_ShareRepurchasesLineItems" abstract="true" name="ShareRepurchasesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/> |
| <xs:element id="algn_RightOfUseAssetsObtainedInExchangeForLeaseObligationsAbstract" abstract="true" name="RightOfUseAssetsObtainedInExchangeForLeaseObligationsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/> |
| <xs:element id="algn_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTable" abstract="true" name="FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/> |
| </xs:schema> |