[xsd-users] LandXML serialization issue

[Constantin Iacobescu]

Hello Boris,


I try to generate a xml file using a LandXML schema binding.
All fine so far but my problem is that some elements are not serialized in
the order they are added to a collection.
To understand me better I show you the schema and the result that I need

     <xs:element name="Alignment">
         <xs:complexType>
             <xs:choice maxOccurs="unbounded">
                 <xs:choice>
                    <xs:element ref="Start" minOccurs="0" />
                    <xs:element ref="CoordGeom" />
                    <xs:element ref="AlignPIs" minOccurs="0" />
                    <xs:element ref="Cant" minOccurs="0" />
                </xs:choice>
                <xs:element ref="StaEquation" minOccurs="0"
maxOccurs="unbounded" />
                <xs:element ref="Profile" minOccurs="0"
maxOccurs="unbounded" />
                <xs:element ref="CrossSects" minOccurs="0" />
                <xs:element ref="Superelevation" minOccurs="0"
maxOccurs="unbounded" />
                <xs:element ref="Feature" minOccurs="0"
maxOccurs="unbounded" />
            </xs:choice>
            <xs:attribute name="name" type="xs:string" use="required" />
            <xs:attribute name="length" type="xs:double" use="required" />
            <xs:attribute name="staStart" type="xs:double" use="required" />
            <xs:attribute name="desc" type="xs:string" />
            <xs:attribute name="oID" type="xs:string" />
            <xs:attribute name="state" type="stateType" />
        </xs:complexType>
    </xs:element>


And the result should be some like this

        <Alignment name="y" desc="x" staStart="0.000000"
length="54306.27780415">
            <CoordGeom>
                <Line length="1922.75851852" dir="173.393177205369">
                    <Start>4538367.05235564 2588532.52063004</Start>
                    <End>4538588.27618442 2586622.53101275</End>
                </Line>
                <Spiral radiusStart="INF" radiusEnd="3000.00000095"
rot="ccw" spiType="clothoid" length="50.00000000" tanLong="33.33345459"
tanShort="16.66677690" theta="-0.477464829125384">
                    <Start>4538588.27618442 2586622.53101275</Start>
                    <PI>4538592.11137973 2586589.41892324</PI>
                    <End>4538593.89095065 2586572.84742423</End>
                </Spiral>
                <Curve rot="ccw" radius="3000" length="320.70404934"
crvType="arc" chord="320.55136393" tangent="160.50490661"
delta="6.12499616673441">
                    <Start>4538593.89095065 2586572.84742423</Start>
                    <Center>4535611.04085678 2586252.52677627</Center>
                    <End>4538611.04084809 2586252.75515951</End>
                    <PI>4538611.02862921 2586413.26006565</PI>
                </Curve>
                <Spiral radiusStart="3000.00000488" radiusEnd="INF"
rot="ccw" spiType="clothoid" length="50.00000000" tanLong="33.33345459"
tanShort="16.66677690" theta="0.477464828501486">
                    <Start>4538611.04084809 2586252.75515951</Start>
                    <PI>4538611.04211690 2586236.08838266</PI>
                    <End>4538610.76687884 2586202.75606443</End>
                </Spiral>
                <Line length="1841.59544380" dir="180.473103030671">
                    <Start>4538610.76687884 2586202.75606443</Start>
                    <End>4538595.56061945 2584361.22340159</End>
                </Line>
            </CoordGeom>
        </Alignment>


My problem is that using el binding made by XSD the result xml would look
like this

<Alignment name="y" desc="x" staStart="0.000000" length="54306.27780415">
            <CoordGeom>
                <Line length="1922.75851852" dir="173.393177205369">
                    <Start>4538367.05235564 2588532.52063004</Start>
                    <End>4538588.27618442 2586622.53101275</End>
                </Line>
                <Line length="1841.59544380" dir="180.473103030671">
                    <Start>4538610.76687884 2586202.75606443</Start>
                    <End>4538595.56061945 2584361.22340159</End>
                </Line>
                <Curve rot="ccw" radius="3000" length="320.70404934"
crvType="arc" chord="320.55136393" tangent="160.50490661"
delta="6.12499616673441">
                    <Start>4538593.89095065 2586572.84742423</Start>
                    <Center>4535611.04085678 2586252.52677627</Center>
                    <End>4538611.04084809 2586252.75515951</End>
                    <PI>4538611.02862921 2586413.26006565</PI>
                </Curve>
                <Spiral radiusStart="INF" radiusEnd="3000.00000095"
rot="ccw" spiType="clothoid" length="50.00000000" tanLong="33.33345459"
tanShort="16.66677690" theta="-0.477464829125384">
                    <Start>4538588.27618442 2586622.53101275</Start>
                    <PI>4538592.11137973 2586589.41892324</PI>
                    <End>4538593.89095065 2586572.84742423</End>
                </Spiral>
                <Spiral radiusStart="3000.00000488" radiusEnd="INF"
rot="ccw" spiType="clothoid" length="50.00000000" tanLong="33.33345459"
tanShort="16.66677690" theta="0.477464828501486">
                    <Start>4538611.04084809 2586252.75515951</Start>
                    <PI>4538611.04211690 2586236.08838266</PI>
                    <End>4538610.76687884 2586202.75606443</End>
                </Spiral>

            </CoordGeom>
        </Alignment>


The elements are getting ordered by their type and should not.
First the all the elements of type "Line" then all "Curve" ... etc

Thanks and Regards,
Costy