File: invalid-restrictions1.xsd

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python-xmlschema 4.1.0-1
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<?xml version="1.0" encoding="UTF-8"?>
<!-- Schema test for invalid restricted models: UPA violation restricting a substitution group head. -->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">

    <xs:element type="xs:string" name="elem1"/>
    <xs:element type="xs:string" name="elem2" substitutionGroup="elem1" />

    <xs:complexType name="basicType1">
        <xs:sequence>
            <xs:element ref="elem1" maxOccurs="unbounded"/>
        </xs:sequence>
    </xs:complexType>

    <!-- Invalid with XSD 1.0, see: https://www.w3.org/Bugs/Public/show_bug.cgi?id=4147 -->
    <xs:complexType name="restrictedType0">
        <xs:complexContent>
            <xs:restriction base="basicType1">
                <xs:sequence>
                    <xs:element ref="elem2"/>
                </xs:sequence>
            </xs:restriction>
        </xs:complexContent>
    </xs:complexType>

    <!-- UPA violation minOccurs < maxOccurs -->
    <xs:complexType name="restrictedType1">
        <xs:complexContent>
            <xs:restriction base="basicType1">
                <xs:sequence>
                    <xs:element ref="elem2" maxOccurs="unbounded"/>
                </xs:sequence>
            </xs:restriction>
        </xs:complexContent>
    </xs:complexType>

    <!-- No UPA violation if the restricted element is empty but elem2 is not a restriction -->
    <xs:complexType name="restrictedType2">
        <xs:complexContent>
            <xs:restriction base="basicType1">
                <xs:sequence>
                    <xs:element ref="elem2" minOccurs="0" maxOccurs="0"/>
                </xs:sequence>
            </xs:restriction>
        </xs:complexContent>
    </xs:complexType>

    <xs:element type="xs:string" name="elem3" abstract="true"/>
    <xs:element type="xs:string" name="elem4" substitutionGroup="elem3" />

    <xs:complexType name="basicType3">
        <xs:sequence>
            <xs:element ref="elem3" maxOccurs="unbounded"/>
        </xs:sequence>
    </xs:complexType>

    <!-- No UPA violation if the head element is abstract (it cannot be used in an instance). -->
    <xs:complexType name="restrictedType3">
        <xs:complexContent>
            <xs:restriction base="basicType3">
                <xs:sequence>
                    <xs:element ref="elem4" maxOccurs="unbounded"/>
                </xs:sequence>
            </xs:restriction>
        </xs:complexContent>
    </xs:complexType>

</xs:schema>