<xsd:element name="principalExchangeAmount">
    <xsd:annotation>
        <xsd:documentation xml:lang="en">Specifies the principal echange amount, either by explicitly defining it, or by point to an amount defined somewhere else in the swap document.</xsd:documentation>
    </xsd:annotation>
    <xsd:complexType>
        <xsd:choice>
            <xsd:element name="amountRelativeTo" type="AmountRelativeTo" />
            <xsd:element name="determinationMethod" type="xsd:string">
                <xsd:annotation>
                    <xsd:documentation xml:lang="en">Specifies the method according to which an amount or a date is determined.</xsd:documentation>
                </xsd:annotation>
            </xsd:element>
            <xsd:element name="principalAmount" type="Money">
                <xsd:annotation>
                    <xsd:documentation xml:lang="en">Principal exchange amount when explictly stated.</xsd:documentation>
                </xsd:annotation>
            </xsd:element>
        </xsd:choice>
    </xsd:complexType>
</xsd:element>