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<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
        xmlns:xmime="http://www.w3.org/2005/05/xmlmime"
        targetNamespace="http://www.w3.org/2005/05/xmlmime">
        <xs:attribute name="contentType">
                <xs:simpleType>
                        <xs:restriction base="xs:string">
                                <xs:minLength value="3" />
                        </xs:restriction>
                </xs:simpleType>
        </xs:attribute>
        <xs:attribute name="expectedContentTypes" type="xs:string" />
        <xs:complexType name="base64Binary">
                <xs:simpleContent>
                        <xs:extension base="xs:base64Binary">
                                <xs:attribute ref="xmime:contentType" />
                        </xs:extension>
                </xs:simpleContent>
        </xs:complexType>
        <xs:complexType name="hexBinary">
                <xs:simpleContent>
                        <xs:extension base="xs:hexBinary">
                                <xs:attribute ref="xmime:contentType" />
                        </xs:extension>
                </xs:simpleContent>
        </xs:complexType>
        <xs:element name="TestBase64Binary" type="xmime:base64Binary"></xs:element>
        <xs:element name="TestHexBinary" type="xmime:hexBinary"></xs:element>
        <xs:element name="ByteArray" nillable="true" type="xs:base64Binary"/>

        <xs:element name="TestBase64MultiElement">
            <xs:complexType>
                <xs:sequence>
                    <xs:element name="param1" type="xs:base64Binary"/>
                    <xs:element name="param2" type="xs:string"/>
                    <xs:element name="param3" type="xs:int"/>
                </xs:sequence>
            </xs:complexType>
        </xs:element>

</xs:schema>