curriculum.xsd

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
	<xs:element name="curriculum">
		<xs:complexType>
			<xs:sequence>
				<xs:element name="group" type="groupType"/>
				<xs:element name="courses" type="coursesType"/>
				<xs:element name="semester-recommendation" type="semesterRecType">
					<xs:unique name="onlyRecommendedOnce">
						<xs:selector xpath=".//cref"/>
						<xs:field xpath="@name"/>
					</xs:unique>
				</xs:element>
			</xs:sequence>
			<xs:attribute name="code" type="xs:string" use="required"/>
			<xs:attribute name="name" type="xs:string" use="required"/>
			<xs:attribute name="source" type="xs:string" use="required"/>
		</xs:complexType>
		<xs:key name="groupNameKey">
			<xs:selector xpath=".//group"/>
			<xs:field xpath="@name"/>
		</xs:key>
		<xs:keyref name="requiresRef" refer="groupNameKey">
			<xs:selector xpath=".//group"/>
			<xs:field xpath="@requires"/>
		</xs:keyref>
		<xs:key name="courseNameKey">
			<xs:selector xpath="courses/course"/>
			<xs:field xpath="@name"/>
		</xs:key>
		<xs:keyref name="cref" refer="courseNameKey">
			<xs:selector xpath=".//cref"/>
			<xs:field xpath="@name"/>
		</xs:keyref>
	</xs:element>
	<xs:complexType name="coursesType">
		<xs:choice>
			<xs:element name="course" type="courseType" maxOccurs="unbounded"/>
		</xs:choice>
	</xs:complexType>
	<xs:complexType name="groupType">
		<xs:choice>
			<xs:element name="group" type="groupType" maxOccurs="unbounded">
				<xs:unique name="crefUniqueInSubgroup">
					<xs:selector xpath="cref"/>
					<xs:field xpath="@name"/>
				</xs:unique>
			</xs:element>
			<xs:element name="cref" type="crefType" maxOccurs="unbounded"/>
			<xs:element name="variable" type="variableType"/>
		</xs:choice>
		<xs:attribute name="name" type="xs:string"/>
		<xs:attribute name="minEcts" type="positiveFloat"/>
		<xs:attribute name="maxEcts" type="positiveFloat"/>
		<xs:attribute name="maxEctsIfUncompleted" type="positiveFloat"/>
		<xs:attribute name="required" type="xs:boolean"/>
		<xs:attribute name="requires" type="xs:string"/>
	</xs:complexType>
	<xs:complexType name="courseType">
		<xs:attribute name="ects" type="positiveFloat" use="required"/>
		<xs:attribute name="name" type="xs:string" use="required"/>
	</xs:complexType>
	<xs:complexType name="crefType">
		<xs:attribute name="name" type="xs:string" use="required"/>
	</xs:complexType>
	<xs:complexType name="variableType">
	</xs:complexType>
	<xs:complexType name="semesterRecType">
		<xs:choice>
			<xs:element name="semester" type="semesterType" maxOccurs="unbounded"/>
		</xs:choice>
	</xs:complexType>
	<xs:complexType name="semesterType">
		<xs:choice>
			<xs:element name="cref" type="crefType" maxOccurs="unbounded"/>
		</xs:choice>
	</xs:complexType>
	<xs:simpleType name="positiveFloat">
		<xs:restriction base="xs:float">
			<xs:minExclusive value="0"/>
		</xs:restriction>
	</xs:simpleType>
</xs:schema>