taverna-osgi-schemas/src/main/resources/ApplicationVersions.xsd

<?xml version="1.0"?>
<xs:schema xmlns="http://ns.taverna.org.uk/2013/application/versions"
	xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:versions="http://ns.taverna.org.uk/2013/application/versions"
	xmlns:jxb="http://java.sun.com/xml/ns/jaxb" jxb:version="1.0"
	targetNamespace="http://ns.taverna.org.uk/2013/application/versions"
	elementFormDefault="qualified">

	<xs:annotation>
		<xs:appinfo>
			<jxb:schemaBindings>
				<jxb:package name="uk.org.taverna.commons.versions.xml.jaxb" />
			</jxb:schemaBindings>
		</xs:appinfo>
	</xs:annotation>

	<xs:simpleType name="semanticVersion">
		<xs:annotation>
			<xs:documentation>A semantic version.</xs:documentation>
		</xs:annotation>
		<xs:restriction base="xs:string">
			<xs:pattern value="[0-9]+\.[0-9]+(\.[0-9]+(\.[0-9A-Za-z_-]+)?)?" />
		</xs:restriction>
	</xs:simpleType>

	<xs:complexType name="version">
		<xs:sequence>
			<xs:element name="version" type="semanticVersion" />
			<xs:element name="file" type="xs:string" />
		</xs:sequence>
	</xs:complexType>

	<xs:complexType name="versions">
		<xs:sequence>
			<xs:element name="id" type="xs:string" />
			<xs:element name="name" type="xs:string" />
			<xs:element name="description" type="xs:string" />
			<xs:element name="latestVersion" type="version" minOccurs="1"
				maxOccurs="1" />
			<xs:element name="previousVersion" type="version"
				minOccurs="0" maxOccurs="unbounded" />
		</xs:sequence>
	</xs:complexType>

</xs:schema>