rendre un schema deterministe pour contrer erreur : non-deterministic content model

Bonjour,
je suis toujours avec mes histoire de case a cocher...
cette fois le schema est bon mais le validateur W3C me dit :
Schema validating with XSV 2.10-1 of 2005/04/22 13:10:49

    * Target: [standalone schema assessment]
         (Real name: schemaForm3.1.xsd)
    * schemaDocs: file:/usr/local/XSV/xsvlog/tmpql66RWuploaded
    * The schema(s) used for schema-validation had
        1 error
    * The target was not assessed

Schema resources involved

Attempt to load a schema document from
file:///usr/local/XSV/xsvlog/tmpql66RWuploaded
 (source: command line) for
   no namespace,
    succeeded
Schema representation errors
Detected during instance validation

file:///usr/local/XSV/xsvlog/tmpql66RWuploaded:105:2: Invalid: non-deterministic content model for type FrameType: {None}:CheckBoxcb/{None}:CheckBoxcb

voici mon schema est ce que quelqu'un pourrait me dire comment le rendre deterministe ...

<?xml version="1.0" encoding="ISO-8859-1"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" attributeFormDefault="unqualified">
    <xs:simpleType name="nameType">
        <xs:restriction base="xs:token"/>
    </xs:simpleType>
    <xs:simpleType name="checkBoxValueType">
        <xs:restriction base="xs:byte">
            <xs:enumeration value="0"/>
            <xs:enumeration value="-1"/>
        </xs:restriction>
    </xs:simpleType>
    <xs:simpleType name="enabledType">
        <xs:restriction base="xs:byte">
            <xs:enumeration value="0"/>
            <xs:enumeration value="-1"/>
        </xs:restriction>
    </xs:simpleType>
    <xs:simpleType name="tb1ValueType">
        <xs:restriction base="xs:byte">
            <xs:pattern value="(\d+(;\d+)+)|(\d+)"/>
        </xs:restriction>
    </xs:simpleType>
    <xs:simpleType name="tb2ValueType">
        <xs:restriction base="xs:byte">
            <xs:pattern value="\d"/>
        </xs:restriction>
    </xs:simpleType>
    <xs:simpleType name="tagType">
        <xs:restriction base="xs:token">
            <xs:enumeration value="cb"/>
            <xs:enumeration value="tb1"/>
            <xs:enumeration value="tb2"/>
        </xs:restriction>
    </xs:simpleType>
    <xs:attribute name="Name" type="nameType"/>
    <xs:attribute name="Enabled" type="enabledType"/>
    <xs:attribute name="Tag" type="tagType"/>
    <xs:complexType name="CheckBoxType">
        <xs:simpleContent>
            <xs:extension base="checkBoxValueType">
                <xs:attribute ref="Name"/>
                <xs:attribute ref="Enabled"/>
                <xs:attribute ref="Tag" fixed="cb"/>
            </xs:extension>
        </xs:simpleContent>
    </xs:complexType>
    <xs:complexType name="tb1Type">
        <xs:simpleContent>
            <xs:extension base="tb1ValueType">
                <xs:attribute ref="Name"/>
                <xs:attribute ref="Enabled"/>
                <xs:attribute ref="Tag" fixed="tb1"/>
            </xs:extension>
        </xs:simpleContent>
    </xs:complexType>
    <xs:complexType name="tb2Type">
        <xs:simpleContent>
            <xs:extension base="tb2ValueType">
                <xs:attribute ref="Name"/>
                <xs:attribute ref="Enabled"/>
                <xs:attribute ref="Tag" fixed="tb2"/>
            </xs:extension>
        </xs:simpleContent>
    </xs:complexType>
    <xs:group name="checkBoxFrameType2">
        <xs:all>
            <xs:element name="CheckBoxcb" type="CheckBoxType" fixed="-1"/>
            <xs:element name="CheckBoxcb" type="CheckBoxType"/>
        </xs:all>
    </xs:group>
    <xs:group name="checkBoxFrameType3">
        <xs:all>
            <xs:element name="CheckBoxcb" type="CheckBoxType" fixed="-1"/>
            <xs:element name="CheckBoxcb" type="CheckBoxType"/>
            <xs:element name="CheckBoxcb" type="CheckBoxType"/>
        </xs:all>
    </xs:group>
    <xs:group name="checkBoxFrameType5">
        <xs:all>
            <xs:element name="CheckBoxcb" type="CheckBoxType" fixed="-1"/>
            <xs:element name="CheckBoxcb" type="CheckBoxType"/>
            <xs:element name="CheckBoxcb" type="CheckBoxType"/>
            <xs:element name="CheckBoxcb" type="CheckBoxType"/>
            <xs:element name="CheckBoxcb" type="CheckBoxType"/>
        </xs:all>
    </xs:group>
    <xs:group name="textBoxFrameType1">
        <xs:all>
            <xs:element name="TextBoxtb1" type="tb1Type"/>
            <xs:element name="TextBoxtb2" type="tb2Type"/>
            <xs:element name="TextBoxtb2" type="tb2Type"/>
        </xs:all>
    </xs:group>
    <xs:complexType name="FrameType">
        <xs:choice>
            <xs:element name="TextBoxtb1" type="tb1Type"/>
            <xs:group ref="textBoxFrameType1"/>
            <xs:group ref="checkBoxFrameType2"/>
            <xs:group ref="checkBoxFrameType3"/>
            <xs:group ref="checkBoxFrameType5"/>
        </xs:choice>
    </xs:complexType>
    <xs:element name="MultiPage">
        <xs:complexType>
            <xs:sequence>
                <xs:element name="Frame" type="FrameType" minOccurs="0" maxOccurs="unbounded"/>
            </xs:sequence>
        </xs:complexType>
    </xs:element>
</xs:schema>

merci d'avance

sam


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