<xs:schema targetNamespace="http://www.imsglobal.org/xsd/imsld_v1p0" xmlns="http://www.imsglobal.org/xsd/imsld_v1p0" xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" attributeFormDefault="unqualified" version="IMS LD Level B version 1.0 Final Draft">
	<!-- ******************** -->
	<!-- ** Change History ** -->
	<!-- ******************** -->
	<xs:annotation>
		<xs:documentation xml:lang="en">24 October 2002
		Restructured the schemas that were submitted as public draft.
		Defined groups for those content models that need to be extended in level C. 
		Nearly all attributes for the level B elements are declared inline, because they are not re-used in other elements.
		Changed the namespace.
		</xs:documentation>
	</xs:annotation>
	
	<!-- ********************* -->
	<!-- ** Include modules ** -->
	<!-- ********************* -->
	<xs:include schemaLocation="IMS_LD_Level_B_emaildata.xsd">
		<xs:annotation>
			<xs:documentation xml:lang="en">Include the email-data element.</xs:documentation>
		</xs:annotation>
	</xs:include>
	<xs:include schemaLocation="IMS_LD_Level_B_expression_schema.xsd">
		<xs:annotation>
			<xs:documentation xml:lang="en">Include the expression schema.</xs:documentation>
		</xs:annotation>
	</xs:include>
	
	<!-- ***************************** -->
	<!-- ** Redefine content models ** -->
	<!-- ***************************** -->
	<xs:redefine schemaLocation="IMS_LD_Level_A.xsd">
		<xs:group name="grp.roles">
			<xs:annotation>
				<xs:documentation xml:lang="en">Add properties into the content model of components, after roles.
				</xs:documentation>
			</xs:annotation>
			<xs:sequence>
				<xs:group ref="grp.roles"/>
				<xs:element ref="properties" minOccurs="0"/>
			</xs:sequence>
		</xs:group>
		<xs:group name="grp.complete-act">
			<xs:annotation>
				<xs:documentation xml:lang="en">Add when-condition-ture and when-property-value-is-set into the choice group of complete-act.
				</xs:documentation>
			</xs:annotation>
			<xs:choice>
				<xs:group ref="grp.complete-act"/>
				<xs:element ref="when-condition-true"/>
				<xs:element ref="when-property-value-is-set" maxOccurs="unbounded"/>
			</xs:choice>
		</xs:group>
		<xs:group name="grp.complete-activity">
			<xs:annotation>
				<xs:documentation xml:lang="en">Add when-property-value-is-set into the choice group of complete-activity.
				</xs:documentation>
			</xs:annotation>
			<xs:choice>
				<xs:group ref="grp.complete-activity"/>
				<xs:element ref="when-property-value-is-set" maxOccurs="unbounded"/>
			</xs:choice>
		</xs:group>
		<xs:group name="grp.complete-play">
			<xs:annotation>
				<xs:documentation xml:lang="en">Add when-property-value-is-set into the choice group of complete-play.
				</xs:documentation>
			</xs:annotation>
			<xs:choice>
				<xs:group ref="grp.complete-play"/>
				<xs:element ref="when-property-value-is-set" maxOccurs="unbounded"/>
			</xs:choice>
		</xs:group>
		<xs:group name="grp.complete-unit-of-learning">
			<xs:annotation>
				<xs:documentation xml:lang="en">Add when-property-value-is-set into the choice group of complete-unit-of-learning.
				</xs:documentation>
			</xs:annotation>
			<xs:choice>
				<xs:group ref="grp.complete-unit-of-learning"/>
				<xs:element ref="when-property-value-is-set" maxOccurs="unbounded"/>
			</xs:choice>
		</xs:group>
		<xs:group name="grp.on-completion">
			<xs:annotation>
				<xs:documentation xml:lang="en">Add change-property-value to on-completion.
				</xs:documentation>
			</xs:annotation>
			<xs:sequence>
				<xs:group ref="grp.on-completion"/>
				<xs:element ref="change-property-value" minOccurs="0" maxOccurs="unbounded"/>
			</xs:sequence>
		</xs:group>
		<xs:group name="grp.method">
			<xs:annotation>
				<xs:documentation xml:lang="en">Add conditions to method.
				</xs:documentation>
			</xs:annotation>
			<xs:sequence>
				<xs:group ref="grp.method"/>
				<xs:element ref="conditions" minOccurs="0" maxOccurs="unbounded"/>
			</xs:sequence>
		</xs:group>
		<xs:group name="grp.service">
			<xs:annotation>
				<xs:documentation xml:lang="en">Add monitor into the choice group of service.
				</xs:documentation>
			</xs:annotation>
			<xs:choice>
				<xs:group ref="grp.service"/>
				<xs:element ref="monitor"/>
			</xs:choice>
		</xs:group>
		<xs:complexType name="time-limitType">
			<xs:annotation>
				<xs:documentation xml:lang="en">Add the attribute property-ref to "simple type" time-limit.
				</xs:documentation>
			</xs:annotation>
			<xs:simpleContent>
				<xs:extension base="time-limitType">
					<xs:attribute name="property-ref" type="xs:IDREF"/>
				</xs:extension>
			</xs:simpleContent>
		</xs:complexType>
	</xs:redefine>
	
	<!-- ********************** -->
	<!-- ** Re-usable groups ** -->
	<!-- ********************** -->
	<xs:group name="grp.property">
		<xs:sequence>
			<xs:element ref="datatype"/>
			<xs:element ref="initial-value" minOccurs="0"/>
			<xs:element ref="restriction" minOccurs="0" maxOccurs="unbounded"/>
		</xs:sequence>
	</xs:group>
	<xs:group name="grp.condition">
		<xs:sequence>
			<xs:element ref="if"/>
			<xs:element ref="then"/>
			<xs:element ref="else" minOccurs="0"/>
		</xs:sequence>
	</xs:group>
	<xs:group name="grp.then">
		<xs:choice>
			<xs:element ref="show"/>
			<xs:element ref="hide"/>
			<xs:element ref="change-property-value"/>
		</xs:choice>
	</xs:group>
	<xs:group name="grp.show-hide">
		<xs:choice>
			<xs:element ref="class"/>
			<xs:element ref="item-ref"/>
			<xs:element ref="environment-ref"/>
			<xs:element ref="learning-activity-ref"/>
			<xs:element ref="support-activity-ref"/>
			<xs:element ref="activity-structure-ref"/>
			<xs:element ref="play-ref"/>
			<xs:element ref="unit-of-learning-href"/>
		</xs:choice>
	</xs:group>
	
	<!-- ************************** -->
	<!-- ** Element declarations ** -->
	<!-- ************************** -->
	<xs:element name="properties" type="propertiesType"/>
	<xs:element name="loc-property" type="propertyType"/>
	<xs:element name="locpers-property" type="propertyType"/>
	<xs:element name="locrole-property" type="rolepropertyType"/>
	<xs:element name="globpers-property" type="global-propertyType"/>
	<xs:element name="glob-property" type="global-propertyType"/>
	<xs:element name="property-group" type="property-groupType"/>
	<xs:element name="when-property-value-is-set" type="when-property-value-is-setType"/>
	<xs:element name="when-condition-true" type="when-condition-trueType"/>
	<xs:element name="change-property-value" type="change-property-valueType"/>
	<xs:element name="conditions" type="conditionsType"/>
	<xs:element name="if" type="expressionType"/>
	<xs:element name="then" type="thenType"/>
	<xs:element name="else" type="elseType"/>
	<xs:element name="show" type="show-hideType"/>
	<xs:element name="hide" type="show-hideType"/>
	<xs:element name="monitor" type="monitorType"/>
	<xs:element name="property-value" type="property-valueType"/>
	<xs:element name="calculate" type="expressionType"/>
	<xs:element name="global-definition">
		<xs:complexType>
			<xs:sequence>
				<xs:element ref="title" minOccurs="0"/>
				<xs:group ref="grp.property"/>
				<xs:element ref="metadata" minOccurs="0"/>
			</xs:sequence>
			<xs:attributeGroup ref="attr.uri.req"/>
		</xs:complexType>
	</xs:element>
	<xs:element name="expression" type="expressionType"/>

	<!-- *************** -->
	<!-- ** Text only ** -->
	<!-- *************** -->
	<xs:element name="initial-value" type="xs:string"/>
	<xs:element name="langstring" type="xs:string"/>

	<!-- ******************************* -->
	<!-- ** Text only with attributes ** -->
	<!-- ******************************* -->
	<xs:element name="datatype">
		<xs:complexType>
			<xs:simpleContent>
				<xs:extension base="xs:string">
					<xs:attribute name="datatype" use="required">
						<xs:simpleType>
							<xs:restriction base="xs:token">
								<xs:enumeration value="string"/>
								<xs:enumeration value="boolean"/>
								<xs:enumeration value="integer"/>
								<xs:enumeration value="uri"/>
								<xs:enumeration value="datetime"/>
								<xs:enumeration value="file"/>
								<xs:enumeration value="real"/>
								<xs:enumeration value="text"/>
								<xs:enumeration value="duration"/>
								<xs:enumeration value="other"/>
							</xs:restriction>
						</xs:simpleType>
					</xs:attribute>
				</xs:extension>
			</xs:simpleContent>
		</xs:complexType>
	</xs:element>
	<xs:element name="restriction">
		<xs:complexType>
			<xs:simpleContent>
				<xs:extension base="xs:string">
					<xs:attribute name="restriction-type">
						<xs:simpleType>
							<xs:restriction base="xs:token">
								<xs:enumeration value="minExclusive"/>
								<xs:enumeration value="minInclusive"/>
								<xs:enumeration value="maxExclusive"/>
								<xs:enumeration value="maxInclusive"/>
								<xs:enumeration value="totalDigits"/>
								<xs:enumeration value="fractionDigits"/>
								<xs:enumeration value="length"/>
								<xs:enumeration value="minLength"/>
								<xs:enumeration value="maxLength"/>
								<xs:enumeration value="enumeration"/>
								<xs:enumeration value="whiteSpace"/>
								<xs:enumeration value="pattern"/>
							</xs:restriction>
						</xs:simpleType>
					</xs:attribute>
				</xs:extension>
			</xs:simpleContent>
		</xs:complexType>
	</xs:element>
	
	<!-- *********** -->
	<!-- ** Empty ** -->
	<!-- *********** -->
	<xs:element name="self">
		<xs:complexType/>
	</xs:element>
	
	<!-- *************************** -->
	<!-- ** Empty with attributes ** -->
	<!-- *************************** -->
	<xs:element name="class">
		<xs:complexType>
			<xs:attributeGroup ref="attr.class"/>
			<xs:attribute name="with-control" type="xs:boolean"/>
			<xs:attribute name="title" type="xs:string"/>
		</xs:complexType>
	</xs:element>
	<xs:element name="existing">
		<xs:complexType>
			<xs:attributeGroup ref="attr.href.req"/>
		</xs:complexType>
	</xs:element>
	<xs:element name="item-ref">
		<xs:complexType>
			<xs:attributeGroup ref="attr.ref.req"/>
		</xs:complexType>
	</xs:element>
	<xs:element name="play-ref">
		<xs:complexType>
			<xs:attributeGroup ref="attr.ref.req"/>
		</xs:complexType>
	</xs:element>
	<xs:element name="property-ref">
		<xs:complexType>
			<xs:attributeGroup ref="attr.ref.req"/>
		</xs:complexType>
	</xs:element>
	<xs:element name="property-group-ref">
		<xs:complexType>
			<xs:attributeGroup ref="attr.ref.req"/>
		</xs:complexType>
	</xs:element>
	
	<!-- ******************* -->
	<!-- ** Complex types ** -->
	<!-- ******************* -->
	<xs:complexType name="propertiesType">
		<xs:choice maxOccurs="unbounded">
			<xs:element ref="loc-property"/>
			<xs:element ref="locpers-property"/>
			<xs:element ref="locrole-property"/>
			<xs:element ref="globpers-property"/>
			<xs:element ref="glob-property"/>
			<xs:element ref="property-group"/>
		</xs:choice>
	</xs:complexType>
	<xs:complexType name="propertyType">
		<xs:sequence>
			<xs:element ref="title" minOccurs="0"/>
			<xs:group ref="grp.property"/>
			<xs:element ref="metadata" minOccurs="0"/>
		</xs:sequence>
		<xs:attributeGroup ref="attr.identifier.req"/>
	</xs:complexType>
	<xs:complexType name="rolepropertyType">
		<xs:sequence>
			<xs:element ref="title" minOccurs="0"/>
			<xs:element ref="role-ref"/>
			<xs:group ref="grp.property"/>
			<xs:element ref="metadata" minOccurs="0"/>
		</xs:sequence>
		<xs:attributeGroup ref="attr.identifier.req"/>
	</xs:complexType>
	<xs:complexType name="global-propertyType">
		<xs:choice>
			<xs:element ref="existing"/>
			<xs:element ref="global-definition"/>
		</xs:choice>
		<xs:attributeGroup ref="attr.identifier.req"/>
	</xs:complexType>
	<xs:complexType name="property-groupType">
		<xs:sequence>
			<xs:element ref="title" minOccurs="0"/>
			<xs:choice maxOccurs="unbounded">
				<xs:element ref="property-ref"/>
				<xs:element ref="property-group-ref"/>
			</xs:choice>
			<xs:element ref="metadata" minOccurs="0"/>
		</xs:sequence>
		<xs:attributeGroup ref="attr.identifier.req"/>
	</xs:complexType>
	<xs:complexType name="when-property-value-is-setType">
		<xs:sequence>
			<xs:element ref="property-ref"/>
			<xs:element ref="property-value" minOccurs="0"/>
		</xs:sequence>
	</xs:complexType>
	<xs:complexType name="change-property-valueType">
		<xs:sequence maxOccurs="unbounded">
			<xs:element ref="property-ref"/>
			<xs:element ref="property-value"/>
		</xs:sequence>
	</xs:complexType>
	<xs:complexType name="when-condition-trueType">
		<xs:sequence>
			<xs:element ref="role-ref"/>
			<xs:element ref="expression"/>
		</xs:sequence>
	</xs:complexType>
	<xs:complexType name="conditionsType">
		<xs:sequence>
			<xs:element ref="title" minOccurs="0"/>
			<xs:group ref="grp.condition" maxOccurs="unbounded"/>
			<xs:element ref="metadata" minOccurs="0"/>
		</xs:sequence>
	</xs:complexType>
	<xs:complexType name="thenType">
		<xs:group ref="grp.then" maxOccurs="unbounded"/>
	</xs:complexType>
	<xs:complexType name="elseType">
		<xs:choice>
			<xs:group ref="grp.then" maxOccurs="unbounded"/>
			<xs:group ref="grp.condition"/>
		</xs:choice>
	</xs:complexType>
	<xs:complexType name="show-hideType">
		<xs:group ref="grp.show-hide" maxOccurs="unbounded"/>
	</xs:complexType>
	<xs:complexType name="monitorType">
		<xs:sequence>
			<xs:choice>
				<xs:element ref="role-ref"/>
				<xs:element ref="self"/>
			</xs:choice>
			<xs:group ref="grp.itemmodel"/>
		</xs:sequence>
	</xs:complexType>
	<xs:complexType name="property-valueType" mixed="true">
		<xs:annotation>
			<xs:documentation xml:lang="en">The element property-value should contain either text, or langstring, or calculate, or property-ref.</xs:documentation>
		</xs:annotation>
		<xs:choice minOccurs="0">
			<xs:element ref="langstring"/>
			<xs:element ref="calculate"/>
			<xs:element ref="property-ref"/>
		</xs:choice>
	</xs:complexType>
</xs:schema>