<xsd:complexType name="UnderlyingAsset" abstract="true" >
  <xsd:annotation>
    <xsd:documentation xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en">A type describing the basic components of a security of index underlyer.</xsd:documentation>
  </xsd:annotation>
  <xsd:complexContent>
    <xsd:extension base="Asset">
      <xsd:sequence>
        <xsd:element minOccurs="0" name="currency" type="Currency">
          <xsd:annotation>
            <xsd:documentation xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en">The currency in which an amount is denominated.</xsd:documentation>
          </xsd:annotation>
        </xsd:element>
        <xsd:element minOccurs="0" name="exchangeId" type="ExchangeId"/>
        <xsd:element minOccurs="0" name="clearanceSystem" type="ClearanceSystem"/>
        <xsd:element minOccurs="0" name="definition" type="ProductReference">
          <xsd:annotation>
            <xsd:documentation xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en">An optional reference to a full FpML product that defines the simple product in greater detail. In case of inconsistency between the terms of the simple product and those of the detailed definition, the values in the simple product override those in the detailed definition.</xsd:documentation>
          </xsd:annotation>
        </xsd:element>
      </xsd:sequence>
    </xsd:extension>
  </xsd:complexContent>
</xsd:complexType>