<?xml version="1.0" encoding="utf-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:gco="http://www.isotc211.org/2005/gco" xmlns:gts="http://www.isotc211.org/2005/gts" xmlns:gmd="http://www.isotc211.org/2005/gmd" targetNamespace="http://www.isotc211.org/2005/gmd" elementFormDefault="qualified" version="2012-07-13">
	<!-- ================================= Annotation ================================ -->
	<xs:annotation>
		<xs:documentation>Geographic MetaData (GMD) extensible markup language is a component of the XML Schema Implementation of Geographic Information Metadata documented in ISO/TS 19139:2007. GMD includes all the definitions of http://www.isotc211.org/2005/gmd namespace. The root document of this namespace is the file gmd.xsd. This maintenance.xsd schema implements the UML conceptual schema defined in A.2.5 of ISO 19115:2003. It contains the implementation of the following classes: MD_MaintenanceInformation, MD_MaintenanceFrequencyCode, MD_ScopeCode, MD_ScopeDescription.</xs:documentation>
	</xs:annotation>
	<!-- ================================== Imports ================================== -->
	<xs:import namespace="http://www.isotc211.org/2005/gts" schemaLocation="../gts/gts.xsd"/>
	<xs:import namespace="http://www.isotc211.org/2005/gco" schemaLocation="../gco/gco.xsd"/>
	<xs:include schemaLocation="../gmd/gmd.xsd"/>
	<xs:include schemaLocation="citation.xsd"/>
	<!-- ########################################################################### -->
	<!-- ########################################################################### -->
	<!-- ================================== Classes ================================= -->
	<xs:complexType name="MD_MaintenanceInformation_Type">
		<xs:annotation>
			<xs:documentation>Information about the scope and frequency of updating</xs:documentation>
		</xs:annotation>
		<xs:complexContent>
			<xs:extension base="gco:AbstractObject_Type">
				<xs:sequence>
					<xs:element name="maintenanceAndUpdateFrequency" type="gmd:MD_MaintenanceFrequencyCode_PropertyType"/>
					<xs:element name="dateOfNextUpdate" type="gco:Date_PropertyType" minOccurs="0"/>
					<xs:element name="userDefinedMaintenanceFrequency" type="gts:TM_PeriodDuration_PropertyType" minOccurs="0"/>
					<xs:element name="updateScope" type="gmd:MD_ScopeCode_PropertyType" minOccurs="0" maxOccurs="unbounded"/>
					<xs:element name="updateScopeDescription" type="gmd:MD_ScopeDescription_PropertyType" minOccurs="0" maxOccurs="unbounded"/>
					<xs:element name="maintenanceNote" type="gco:CharacterString_PropertyType" minOccurs="0" maxOccurs="unbounded"/>
					<xs:element name="contact" type="gmd:CI_ResponsibleParty_PropertyType" minOccurs="0" maxOccurs="unbounded"/>
				</xs:sequence>
			</xs:extension>
		</xs:complexContent>
	</xs:complexType>
	<!-- ........................................................................ -->
	<xs:element name="MD_MaintenanceInformation" type="gmd:MD_MaintenanceInformation_Type"/>
	<!-- ........................................................................ -->
	<xs:complexType name="MD_MaintenanceInformation_PropertyType">
		<xs:sequence minOccurs="0">
			<xs:element ref="gmd:MD_MaintenanceInformation"/>
		</xs:sequence>
		<xs:attributeGroup ref="gco:ObjectReference"/>
		<xs:attribute ref="gco:nilReason"/>
	</xs:complexType>
	<!-- =========================================================================== -->
	<xs:complexType name="MD_ScopeDescription_Type">
		<xs:annotation>
			<xs:documentation>Description of the class of information covered by the information</xs:documentation>
		</xs:annotation>
		<xs:choice>
			<xs:element name="attributes" type="gco:ObjectReference_PropertyType" maxOccurs="unbounded"/>
			<xs:element name="features" type="gco:ObjectReference_PropertyType" maxOccurs="unbounded"/>
			<xs:element name="featureInstances" type="gco:ObjectReference_PropertyType" maxOccurs="unbounded"/>
			<xs:element name="attributeInstances" type="gco:ObjectReference_PropertyType" maxOccurs="unbounded"/>
			<xs:element name="dataset" type="gco:CharacterString_PropertyType"/>
			<xs:element name="other" type="gco:CharacterString_PropertyType"/>
		</xs:choice>
	</xs:complexType>
	<!-- ........................................................................ -->
	<xs:element name="MD_ScopeDescription" type="gmd:MD_ScopeDescription_Type"/>
	<!-- ........................................................................ -->
	<xs:complexType name="MD_ScopeDescription_PropertyType">
		<xs:sequence minOccurs="0">
			<xs:element ref="gmd:MD_ScopeDescription"/>
		</xs:sequence>
		<xs:attribute ref="gco:nilReason"/>
	</xs:complexType>
	<!-- =========================================================================== -->
	<!-- ........................................................................ -->
	<xs:element name="MD_MaintenanceFrequencyCode" type="gco:CodeListValue_Type" substitutionGroup="gco:CharacterString"/>
	<!-- ........................................................................ -->
	<xs:complexType name="MD_MaintenanceFrequencyCode_PropertyType">
		<xs:sequence minOccurs="0">
			<xs:element ref="gmd:MD_MaintenanceFrequencyCode"/>
		</xs:sequence>
		<xs:attribute ref="gco:nilReason"/>
	</xs:complexType>
	<!-- =========================================================================== -->
	<!-- ........................................................................ -->
	<xs:element name="MD_ScopeCode" type="gco:CodeListValue_Type" substitutionGroup="gco:CharacterString"/>
	<!-- ........................................................................ -->
	<xs:complexType name="MD_ScopeCode_PropertyType">
		<xs:sequence minOccurs="0">
			<xs:element ref="gmd:MD_ScopeCode"/>
		</xs:sequence>
		<xs:attribute ref="gco:nilReason"/>
	</xs:complexType>
	<!-- =========================================================================== -->
</xs:schema>
