File: example/schema.xsd

<?xml version="1.0" encoding="utf-8" ?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
	elementFormDefault="qualified"
	attributeFormDefault="qualified">

	<xs:simpleType name="content">
		<xs:restriction base="xs:string">
			<xs:whiteSpace value="collapse"/>
			<xs:minLength value="1" />
		</xs:restriction>
	</xs:simpleType>

	<!-- Notice that restriction base type is our own datatype "content" -->
	<xs:simpleType name="title">
		<xs:restriction base="content">
			<xs:maxLength value="255" />
		</xs:restriction>
	</xs:simpleType>

	<xs:element name="article">
		<xs:complexType>
			<xs:sequence>
				<xs:element name="publishdate" type="xs:date" />
				<xs:element name="title" type="xs:string" />
				<xs:element name="content" type="xs:string" />
			</xs:sequence>
		</xs:complexType>
	</xs:element>

</xs:schema>