test/schemas/bug321475_1.xsd

<?xml version="1.0"?>
<xs:schema targetNamespace="http://www.collada.org/2005/11/COLLADASchema"
    xmlns="http://www.collada.org/2005/11/COLLADASchema"
    xmlns:xs="http://www.w3.org/2001/XMLSchema"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    elementFormDefault="qualified" version="1.4.0" xml:lang="EN">
    <xs:element name="animation">
        <xs:complexType>
            <xs:sequence>
                <xs:element ref="asset" minOccurs="0"/>
                <xs:choice>
                    <xs:sequence>
                        <xs:element ref="source" maxOccurs="unbounded"/>
                        <xs:choice>
                            <xs:sequence>
                                <xs:element ref="sampler" maxOccurs="unbounded"/>
                                <xs:element ref="channel" maxOccurs="unbounded"/>
                                <xs:element ref="animation" minOccurs="0" maxOccurs="unbounded"/>
                            </xs:sequence>
                            <xs:element ref="animation" maxOccurs="unbounded"/>
                        </xs:choice>
                    </xs:sequence>
                    <xs:sequence>
                        <xs:element ref="sampler" maxOccurs="unbounded"/>
                        <xs:element ref="channel" maxOccurs="unbounded"/>
                        <xs:element ref="animation" minOccurs="0" maxOccurs="unbounded"/>
                    </xs:sequence>
                    <xs:element ref="animation" maxOccurs="unbounded"/>
                </xs:choice>
                <xs:element ref="extra" minOccurs="0" maxOccurs="unbounded"/>
            </xs:sequence>
            <xs:attribute name="id" type="xs:ID"/>
            <xs:attribute name="name" type="xs:NCName"/>
        </xs:complexType>
    </xs:element>

    <xs:element name="extra"/>
    <xs:element name="asset"/>
    <xs:element name="channel"/>
    <xs:element name="sampler"/>
    <xs:element name="source"/>
    <xs:element name="technique"/>
</xs:schema>