Complex parameter with a list and structure

complex_list_parameter.xml

    <Command>
        ...
        <Parameter>
            <Identifier>ExpectedRackContent</Identifier>
            <DisplayName>Expected Rack Content</DisplayName>
            <Description>The vials barcode and position which are expected within the rack</Description>
            <DataType>
                <List>
                    <DataType>
                        <Structure>
                            <Element>
                                <Identifier>RackPosition</Identifier>
                                <DisplayName>Rack Position</DisplayName>
                                <Description>A cell within a rack</Description>
                                <DataType>
                                    <Basic>String</Basic>
                                </DataType>
                            </Element>
                            <Element>
                                <Identifier>VialBarcode</Identifier>
                                <DisplayName>Vial Barcode</DisplayName>
                                <Description>the barcode of the vial within the rack position given</Description>
                                <DataType>
                                    <Basic>String</Basic>
                                </DataType>
                            </Element>
                            <Element>
                                <Identifier>VialVolume</Identifier>
                                <DisplayName>Vial Volume</DisplayName>
                                <Description>The volume of material within the Vial in ml</Description>
                                <DataType>
                                    <Basic>String</Basic>
                                </DataType>
                            </Element>
                        </Structure>
                    </DataType>
                </List>
            </DataType>
        </Parameter>
    </Command>