[appendix]
= XML Schema Documents

* Introduction
This annex contains the normative schemas for the _<<WIS,Web Integration Service>>_, the _<<assoc_xml_request,GetAssociations request>>_ and the _<<assoc_xml_response,GetAssociations response>>_.

* *wis.xsd*

----
<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema
   targetNamespace="http://www.opengis.net/wis/1.0"
   xmlns:xsd="http://www.w3.org/2001/XMLSchema"
   xmlns:wis="http://www.opengis.net/wis/1.0"
   xmlns:ows="http://www.opengis.net/ows/2.0"
   xmlns:xlink="http://www.w3.org/1999/xlink"
   xmlns:xml="http://www.w3.org/XML/1998/namespace"
   elementFormDefault="qualified" version="1.0.0">
   <xsd:annotation>
      <xsd:documentation>This XML Schema Document includes and imports, 
      directly or indirectly, all the XML Schemas defined by the 
      Web Integration Service (WIS) Implementation Specification.

      WIS is an OGC Engineering Report.
      Copyright (c) 2014 Open Geospatial Consortium.
      To obtain additional rights of use,
      visit http://www.opengeospatial.org/legal/ .     
      </xsd:documentation>
   </xsd:annotation>
   <!-- ===========================================================
        Includes and Imports
        =========================================================== -->
   <xsd:import namespace="http://www.w3.org/XML/1998/namespace"
      schemaLocation="http://www.w3.org/2001/xml.xsd"/>
   <xsd:import namespace="http://www.w3.org/1999/xlink"
      schemaLocation="http://www.w3.org/1999/xlink.xsd"/>
   <xsd:import namespace="http://www.opengis.net/ows/2.0"
      schemaLocation="http://schemas.opengis.net/ows/2.0/owsAll.xsd"/>

   <!-- =========================================================== -->
   <!-- =   GETCAPABILITIES Request and Response                  = -->
   <!-- =========================================================== -->
   <!-- REQUEST -->
   <xsd:element name="GetCapabilities" type="wis:GetCapabilitiesType"/>
   <xsd:complexType name="GetCapabilitiesType">
      <xsd:complexContent>
         <xsd:extension base="ows:GetCapabilitiesType">
            <xsd:attribute name="service" type="ows:ServiceType"
                           use="required" fixed="WIS"/>
         </xsd:extension>
      </xsd:complexContent>
   </xsd:complexType>
   <!-- RESPONSE -->
   <xsd:element name="Capabilities" type="wis:WIS_CapabilitiesType"/>
   <xsd:complexType name="WIS_CapabilitiesType">
      <xsd:complexContent>
         <xsd:extension base="ows:CapabilitiesBaseType">
            <xsd:sequence>
               <xsd:element ref="wis:Contents"/>
            </xsd:sequence>
         </xsd:extension>
      </xsd:complexContent>
   </xsd:complexType>
   <xsd:element name="Contents" type="wis:ContentsType"/>
   <xsd:complexType name="ContentsType">
      <xsd:sequence>
         <xsd:element ref="wis:Service" maxOccurs="unbounded"/>
      </xsd:sequence>
   </xsd:complexType>
   <xsd:element name="Service" type="wis:ServiceType"/>
   <xsd:complexType name="ServiceType">
      <xsd:sequence>
         <xsd:element ref="ows:ServiceIdentification"/>
      </xsd:sequence>
      <xsd:attribute name="type" type="wis:TokenOrAnyURI" use="required"/>
      <xsd:attribute name="baseUrl" type="xsd:anyURI" use="required"/>
   </xsd:complexType>
   <xsd:simpleType name="TokenOrAnyURI">
      <xsd:union memberTypes="xsd:token xsd:anyURI"/>
   </xsd:simpleType>
</xsd:schema>
----

* *owsGetAssociations.xsd*

----
<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema
   targetNamespace="http://www.opengis.net/ows/2.0"
   xmlns:xsd="http://www.w3.org/2001/XMLSchema"
   xmlns:xml="http://www.w3.org/XML/1998/namespace"
   xmlns:xlink="http://www.w3.org/1999/xlink"
   elementFormDefault="qualified"
   version="1.0.0">
   <xsd:annotation>
      <xsd:documentation>
         This XML schema document provides a schema for the
         GetAssociations operation which allows a service to
         advertise its associations.

         Copyright (c) 2014 Open Geospatial Consortium.
         To obtain additional rights of use,
         visit http://www.opengeospatial.org/legal/ .
      </xsd:documentation>
   </xsd:annotation>

   <!-- ===========================================================
        Includes and Imports
        =========================================================== -->
   <xsd:import namespace="http://www.w3.org/XML/1998/namespace"
               schemaLocation="http://www.w3.org/2001/xml.xsd"/>
   <xsd:import namespace="http://www.w3.org/1999/xlink"
               schemaLocation="http://www.w3.org/1999/xlink.xsd"/>
   <xsd:include schemaLocation="../../ows/2.0/owsAll.xsd"/>

   <!-- ===========================================================
        GETASSOCIATIONS REQUEST
        =========================================================== -->
   <xsd:element name="GetAssociations" type="ows:GetAssociationsType"/>
   <xsd:complexType name="GetAssociationsType">
      <xsd:sequence>
         <xsd:element name="Content" type="as:StringOrQName"
                      minOccurs="0" maxOccurs="unbounded"/>
      </xsd:sequence>
      <xsd:attribute name="service"
                     type="ows:ServiceType" use="required"/>
      <xsd:attribute name="version" type="xsd:string"
                     use="required" fixed="1.0.0"/>
      <xsd:attribute name="outputFormat"
                     type="xsd:string" default="application/as+xml"/>
   </xsd:complexType>
   <xsd:simpleType name="StringOrQName">
      <xsd:union memberTypes="xsd:string xsd:QName"/>
   </xsd:simpleType>

   <!-- ===========================================================
        GETASSOCIATIONS RESPONSE 
        =========================================================== -->
   <!-- see associations.xsd -->

</xsd:schema>
----

* *associations.xsd*

----
<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema
   targetNamespace="http://www.opengis.net/associations/1.0"
   xmlns:assoc="http://www.opengis.net/associations/1.0"
   xmlns:xlink="http://www.w3.org/1999/xlink"
   xmlns:xsd="http://www.w3.org/2001/XMLSchema"
   xmlns:xml="http://www.w3.org/XML/1998/namespace"
   elementFormDefault="qualified"
   version="1.0.0">
   <xsd:annotation>
      <xsd:documentation>This XML Schema Document includes and imports, 
      directly or indirectly, all the XML Schemas defined by the 
      Web Integration Service (WIS) Engineering Report.

      WIS is an OGC Engineering Report.
      Copyright (c) 2010 Open Geospatial Consortium.
      To obtain additional rights of use,
      visit http://www.opengeospatial.org/legal/ .     
      </xsd:documentation>
   </xsd:annotation>
   <!-- ==============================================================
        Includes and Imports
        ============================================================== -->
   <xsd:import namespace="http://www.w3.org/XML/1998/namespace"
      schemaLocation="http://www.w3.org/2001/xml.xsd"/>
   <xsd:import namespace="http://www.w3.org/1999/xlink"
      schemaLocation="http://www.w3.org/1999/xlink.xsd"/>
   <!-- ================================================================== -->
   <!-- =   BASE TYPES                                                   = -->
   <!-- ================================================================== -->
   <xsd:complexType name="BaseRequestType" abstract="true">
      <xsd:attribute name="service"
                     type="xsd:string" use="required" fixed="WOS"/>
      <xsd:attribute name="version" type="assoc:VersionStringType"
         use="required"/>
      <xsd:attribute name="handle" type="xsd:string"/>
   </xsd:complexType>
   <xsd:simpleType name="VersionStringType">
      <xsd:restriction base="xsd:string">
         <xsd:pattern value="1\.0\.\d+"/>
      </xsd:restriction>
   </xsd:simpleType>
   <!-- ================================================================== -->
   <xsd:complexType name="EmptyType"/>
   <!-- ================================================================== -->
   <xsd:complexType name="DescriptionType">
      <xsd:simpleContent>
         <xsd:extension base="xsd:string">
            <!-- Key is a handle identifying the kind of description
                 (e.g.  key="title" or key="abstract"). -->
            <xsd:attribute name="key" type="xsd:string" use="required"/>
            <xsd:attribute name="charset" type="xsd:string"
                           use="optional" default="UTF8"/>
            <xsd:attribute ref="xml:lang" use="optional" default="en"/>
         </xsd:extension>
      </xsd:simpleContent>
   </xsd:complexType>
   <!-- =================================================================== -->
   <xsd:complexType name="DynamicPropertyType" mixed="true">
      <xsd:sequence>
         <xsd:any minOccurs="0"/>
      </xsd:sequence>
      <xsd:attribute name="name" type="xsd:string" use="required"/>
      <xsd:attribute name="type" type="xsd:string" use="required"/>
      <xsd:attribute name="codeSpace" type="xsd:anyURI" use="optional"/>
   </xsd:complexType>
   <!-- =================================================================== -->
   <xsd:complexType name="BaseElementType">
      <xsd:sequence>
         <xsd:element name="Description" type="assoc:DescriptionType"
                      minOccurs="0" maxOccurs="unbounded"/>
         <xsd:element name="Property" type="assoc:DynamicPropertyType"
                      minOccurs="0" maxOccurs="unbounded"/>
      </xsd:sequence>
   </xsd:complexType>
   <!-- =================================================================== -->
   <xsd:simpleType name="TokenOrAnyURI">
      <xsd:union memberTypes="xsd:token xsd:anyURI"/>
   </xsd:simpleType>
   <!-- =================================================================== -->
   <xsd:element name="Identifier">
      <xsd:annotation>
         <xsd:documentation>
         An identifier of a particular resource within an OGC web service.
         If the identifier is inherently namespace-qualified (as is the case,
         for example, with WFS feature types), then it should indicate the
         namespace via the "namespace" attribute.
         </xsd:documentation>
      </xsd:annotation>
      <xsd:complexType>
         <xsd:simpleContent>
            <xsd:extension base="xsd:string">
               <xsd:attribute name="namespace" type="xsd:anyURI">
                  <xsd:annotation>
                     <xsd:documentation>
                     The namespace (if applicable) of the identifier.
                     </xsd:documentation>
                  </xsd:annotation>
               </xsd:attribute>
            </xsd:extension>
         </xsd:simpleContent>
      </xsd:complexType>
   </xsd:element>
   <!-- === RESOURCE TYPE ================================================ -->
   <xsd:complexType name="ResourceType">
      <xsd:annotation>
         <xsd:documentation>
         A web-accessible resource.  A resource may be either
         a URL-addressible resource or an OGC-Web-Service resource.
         If the latter, the specified URL is the canonical base URL of the
         OGC web service that serves the resource, and an identifier is
         supplied which locates the resource within that service.  The OGC
         service type must be deduced by the specified resource type.
         E.g., a wmsLayer resource is served by a WMS server while a
         wfsFeatureType resource is served by a WFS server.
         </xsd:documentation>
      </xsd:annotation>
      <xsd:sequence>
         <xsd:element ref="assoc:Identifier" minOccurs="0">
            <xsd:annotation>
               <xsd:documentation>
               The identifier of the resource within the OGC web service.
               Supply if and only if this is an OGC-Web-Service resource
               (i.e., if its address is a tuple of OGC-web-service base
               URL and service-instance-specific identifier).
               </xsd:documentation>
            </xsd:annotation>
         </xsd:element>
      </xsd:sequence>
      <xsd:attribute name="type" type="assoc:TokenOrAnyURI" use="optional">
         <xsd:annotation>
            <xsd:documentation>
            The type of the resource, using a controlled vocabulary.
            (E.g., "wmsLayer", "wmtsLayer", "wfsFeatureType",
            "wcsCoverage", "ogcWebService", "webPage").  Note that a type
            of "ogcWebService" indicates that the resource is the OGC web
            service itself, in which case the identifier must be omitted
            since it is not a resource served by an OGC web service.

            The vocabulary of this attribute is defined and controlled
            by specific application domains which should specify a set
            of standard values and their meanings, but which shall not
            constrain the use to only these values.  Parsers shall not
            fail on unrecognized values of this attribute, and are free
            to ignore associations that specify an unrecognized value
            for this attribute.
            </xsd:documentation>
          </xsd:annotation>
      </xsd:attribute>
      <xsd:attribute ref="xlink:href" use="required">
         <xsd:annotation>
            <xsd:documentation>
            Identifies the resource (or the server of an OGC-Web-Service
            resource) by URL reference.  If the resource is an
            OGC-Web-Service resource, the URL must be the canonical
            base URL of the OGC web service that serves the resource.
            If the resource is of type "ogcWebService", the the URL must
            be the canonical base URL of the OGC web service.  All other
            resource types are considered to be directly addressible by
            the supplied URL reference.
            </xsd:documentation>
         </xsd:annotation>
      </xsd:attribute>
   </xsd:complexType>
   <!-- === ASSOCIATIONS (i.e. collection of Association) ================ -->
   <xsd:element name="Associations">
      <xsd:annotation>
         <xsd:documentation>A set of associations.</xsd:documentation>
      </xsd:annotation>
      <xsd:complexType>
         <xsd:sequence>
            <xsd:element ref="assoc:Association"
                         minOccurs="0" maxOccurs="unbounded"/>
         </xsd:sequence>
         <xsd:attribute name="version" type="xsd:string"
                        use="required" fixed="1.0.0"/>
      </xsd:complexType>
   </xsd:element>
   <!-- === ASSOCIATION ================================================== -->
   <xsd:element name="Association" type="assoc:AssociationType"/>
   <xsd:complexType name="AssociationType">
      <xsd:annotation>
         <xsd:documentation>
         An association between two resources.  An association is logically
         of the form "SOURCE REL TARGET", where the SOURCE resource is the
         subject of a directional RELationship of the specified type with
         the TARGET resource.  E.g., "layer X renders feature type Y".
         </xsd:documentation>
      </xsd:annotation>
      <xsd:complexContent>
         <xsd:extension base="assoc:BaseElementType">
            <xsd:sequence>
               <xsd:element name="Source" type="assoc:ResourceType">
                  <xsd:annotation>
                     <xsd:documentation>
                     The source resource of the association.
                     </xsd:documentation>
                  </xsd:annotation>
               </xsd:element>
               <xsd:element name="Target" type="assoc:ResourceType">
                  <xsd:annotation>
                     <xsd:documentation>
                     The target resource of the association.
                     </xsd:documentation>
                  </xsd:annotation>
               </xsd:element>
            </xsd:sequence>
            <xsd:attribute name="id"
                           type="assoc:TokenOrAnyURI" use="optional">
               <xsd:annotation>
                  <xsd:documentation>
                  An optional identifier for this association.  The 
                  intent is to be able to assign an identifier to 
                  an association when it is considered a first class
                  object.
                  </xsd:documentation>
               </xsd:annotation>
            </xsd:attribute>
            <xsd:attribute name="rel"
                           type="assoc:TokenOrAnyURI" use="required">
               <xsd:annotation>
                  <xsd:documentation>
                  The association type, using a controlled vocabulary.
                  (E.g., "renders", "renderedBy", "tiles", "tiledBy",
                  "cascades", "cascadedBy", "alternateSource", "describes",
                  "describedBy".)

                  The vocabulary of this attribute is defined and controlled
                  by specific application domains which should specify a set
                  of standard values and their meanings, but which shall not
                  constrain the use to only these values.  Parsers shall not
                  fail on unrecognized values of this attribute, and are free
                  to ignore associations that specify an unrecognized value
                  for this attribute.
                  </xsd:documentation>
               </xsd:annotation>
            </xsd:attribute>
         </xsd:extension>
      </xsd:complexContent>
   </xsd:complexType>
</xsd:schema>
----