<xs:group name="DerivativeSecurityDefinitionElements">
<xs:sequence>
<xs:element name="DerivInstrmt" type="DerivativeInstrument_Block_t" minOccurs="0" maxOccurs="1" />
<xs:element name="Attrb" type="DerivativeInstrumentAttribute_Block_t" minOccurs="0" maxOccurs="unbounded" />
<xs:element name="MktSegGrp" type="MarketSegmentGrp_Block_t" minOccurs="0" maxOccurs="unbounded" />
</xs:sequence>
</xs:group>
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