<xs:element name="reg" minOccurs="0" maxOccurs="unbounded">
    <xs:complexType>
        <xs:sequence>
            <xs:element name="address" type="xs:string" minOccurs="1" maxOccurs="1">
                <xs:annotation>
                    <xs:documentation>This should be the name (e.g. CL_CHAN_EN) of the register in the frame grabber that you wish to modify.
The "data" field will be written to this is address.
Note that this can also be the word "delay", in which case the "data" field will be a delay in milliseconds.</xs:documentation>
                </xs:annotation>
            </xs:element>
            <xs:element name="data" type="xs:string" minOccurs="1" maxOccurs="1">
                <xs:annotation>
                    <xs:documentation>This contains the value that will be written to the "address" field above.
If the address field is set to "delay" this this field contains the number of milliseconds to wait.</xs:documentation>
                </xs:annotation>
            </xs:element>
        </xs:sequence>
        <xs:attribute name="comment" type="xs:string" use="optional" />
    </xs:complexType>
</xs:element>