Kepler Schema dependency

<?xml version="1.0" encoding="UTF-8"?>
<schema
	targetNamespace="http://www.eclipse.org/kepler/project/model/dependency"
	elementFormDefault="qualified" xmlns="http://www.w3.org/2001/XMLSchema"
	xmlns:tns="http://www.eclipse.org/kepler/project/model/dependency"
	xmlns:pref="http://www.eclipse.org/kepler/project/model">

	<import
		namespace="http://www.eclipse.org/kepler/project/model"
		schemaLocation="project-core.xsd">
	</import>
	
	<complexType name="projectDependency" abstract="true">
		<complexContent>
			<extension base="pref:dependency">
				<sequence>
                    <element name="projectId" type="string" maxOccurs="1" minOccurs="1"></element>
                    <element name="versionId" type="string" maxOccurs="1" minOccurs="0"></element>
                </sequence>
			</extension>
		</complexContent>
	</complexType>

	<complexType name="compileDependency">
		<complexContent>
			<extension base="tns:projectDependency">
			</extension>
		</complexContent>
	</complexType>
	
	<complexType name="runtimeDependency">
		<complexContent>
			<extension base="tns:projectDependency">
			</extension>
		</complexContent>
	</complexType>
	
	<complexType name="testDependency">
		<complexContent>
			<extension base="tns:projectDependency">
			</extension>
		</complexContent>
	</complexType>
</schema>