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<!--Copyright 2026 Workiva-->
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  <xs:element id="ck0001083387_C000192497Member" abstract="true" name="C000192497Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ck0001083387_C000192498Member" abstract="true" name="C000192498Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ck0001083387_C000192499Member" abstract="true" name="C000192499Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ck0001083387_C000192500Member" abstract="true" name="C000192500Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ck0001083387_SpecificStrategyResearchRiskMember" abstract="true" name="SpecificStrategyResearchRiskMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ck0001083387_EventDrivenRiskMember" abstract="true" name="EventDrivenRiskMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ck0001083387_ForeignInvestmentRiskMember" abstract="true" name="ForeignInvestmentRiskMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ck0001083387_EquityRiskMember" abstract="true" name="EquityRiskMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ck0001083387_EmergingMarketsRiskMember" abstract="true" name="EmergingMarketsRiskMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ck0001083387_CurrencyRiskMember" abstract="true" name="CurrencyRiskMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ck0001083387_DistressedSecuritiesRiskMember" abstract="true" name="DistressedSecuritiesRiskMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ck0001083387_PreferredStockRiskMember" abstract="true" name="PreferredStockRiskMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ck0001083387_RegulatoryRiskMember" abstract="true" name="RegulatoryRiskMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ck0001083387_SmallCapAndMidCapCompanyRiskMember" abstract="true" name="SmallCapAndMidCapCompanyRiskMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ck0001083387_WarrantsAndRightsRiskMember" abstract="true" name="WarrantsAndRightsRiskMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ck0001083387_InitialPublicOfferingsRiskMember" abstract="true" name="InitialPublicOfferingsRiskMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ck0001083387_LargeCapCompanyRiskMember" abstract="true" name="LargeCapCompanyRiskMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ck0001083387_ManagementAndStrategyRiskMember" abstract="true" name="ManagementAndStrategyRiskMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ck0001083387_ConvertibleSecuritiesRiskMember" abstract="true" name="ConvertibleSecuritiesRiskMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
