<xsd:group name="EquityExpiration.model">
    <xsd:annotation>
        <xsd:documentation xml:lang="en">Choice between expiration expressed as symbolic and optional literal time, or using a determination method.</xsd:documentation>
    </xsd:annotation>
    <xsd:choice>
        <xsd:sequence>
            <xsd:element name="equityExpirationTimeType" type="TimeTypeEnum">
                <xsd:annotation>
                    <xsd:documentation xml:lang="en">The time of day at which the equity option expires, for example the official closing time of the exchange.</xsd:documentation>
                </xsd:annotation>
            </xsd:element>
            <xsd:element name="equityExpirationTime" type="BusinessCenterTime" minOccurs="0">
                <xsd:annotation>
                    <xsd:documentation xml:lang="en">The specific time of day at which the equity option expires.</xsd:documentation>
                </xsd:annotation>
            </xsd:element>
        </xsd:sequence>
        <xsd:element name="expirationTimeDetermination" type="DeterminationMethod">
            <xsd:annotation>
                <xsd:documentation xml:lang="en">Expiration time determination method.</xsd:documentation>
            </xsd:annotation>
        </xsd:element>
    </xsd:choice>
</xsd:group>