demo.xsd

<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema" targetNamespace="http://www.example.org/demo" xmlns:tns="http://www.example.org/demo" elementFormDefault="qualified">
	<complexType name="abstract-element" abstract="true">
		<attribute name="attribute" type="string" />
	</complexType>
	<complexType name="other-element">
		<attribute name="attribute" type="string" />
	</complexType>
	<complexType name="derived-element">
		<complexContent>
			<extension base="tns:abstract-element">
				<attribute name="sub2-attribute" type="string"/>
			</extension>
		</complexContent>
	</complexType>
	<element name="test">
		<complexType>
			<sequence>
				<element name="direct" type="tns:abstract-element" />
				<element name="other" type="tns:other-element" />
				<element name="derive">
					<complexType>
						<complexContent>
							<extension base="tns:abstract-element">
								<attribute name="sub-attribute" type="string"/>
							</extension>
						</complexContent>
					</complexType>
				</element>
				<element name="derive-2" type="tns:derived-element" />
			</sequence>
		</complexType>
	</element>
</schema>