wfs.xsd

电子地图服务器,搭建自己的地图服务

            response to a GetFeature request, a Web Feature Service
            must be able to generate a GML3 response that validates
            using a schema generated by the DescribeFeatureType request.
            A Web Feature Service may support other possibly non-XML
            (and even binary) output formats as long as those formats
            are advertised in the capabilities document.
         </xsd:documentation>
      </xsd:annotation>
      <xsd:complexContent>
         <xsd:extension base="wfs:BaseRequestType">
            <xsd:sequence>
               <xsd:element ref="wfs:Query" maxOccurs="unbounded"/>
            </xsd:sequence>
            <xsd:attribute name="resultType"
                           type="wfs:ResultTypeType" use="optional"
                           default="results">
               <xsd:annotation>
                  <xsd:documentation>
                     The resultType attribute is used to indicate
                     what response a WFS should return to user once
                     a GetFeature request is processed.
                     Possible values are:
                        results - meaning that the full response set
                                  (i.e. all the feature instances) 
                                  should be returned.
                        hits    - meaning that an empty response set
                                  should be returned (i.e. no feature
                                  instances should be returned) but
                                  the "numberOfFeatures" attribute
                                  should be set to the number of feature
                                  instances that would be returned.
                  </xsd:documentation>
               </xsd:annotation>
            </xsd:attribute>
            <xsd:attribute name="outputFormat"
                           type="xsd:string" use="optional"
                           default="text/xml; subtype=gml/3.1.1">
               <xsd:annotation>
                  <xsd:documentation>
                     The outputFormat attribute is used to specify the output
                     format that the Web Feature Service should generate in
                     response to a GetFeature or GetFeatureWithLock element.
                     The default value of 'text/xml; subtype=gml/3.1.1'
                     indicates that the output is an XML document that
                     conforms to the Geography Markup Language (GML)
                     Implementation Specification V3.1.1.
                     For the purposes of experimentation, vendor extension,
                     or even extensions that serve a specific community of
                     interest, other acceptable output format values may be
                     used to specify other formats as long as those values
                     are advertised in the capabilities document.
                     For example, the value WKB may be used to indicate that a 
                     Well Known Binary format be used to encode the output.
                  </xsd:documentation>
               </xsd:annotation>
            </xsd:attribute>
            <xsd:attribute name="maxFeatures"
                           type="xsd:positiveInteger" use="optional">
               <xsd:annotation>
                  <xsd:documentation>
                     The maxFeatures attribute is used to specify the maximum
                     number of features that a GetFeature operation should
                     generate (regardless of the actual number of query hits).
                  </xsd:documentation>
               </xsd:annotation>
            </xsd:attribute>
            <xsd:attribute name="traverseXlinkDepth"
                           type="xsd:string" use="optional">
               <xsd:annotation>
                  <xsd:documentation>
                     This attribute indicates the depth to which nested property
                     XLink linking element locator attribute (href) XLinks are
                     traversed and resolved if possible.  A value of "1"
                     indicates that one linking element locator attribute
                     (href) Xlink will be traversed and the referenced element
                     returned if possible, but nested property XLink linking
                     element locator attribute (href) XLinks in the returned
                     element are not traversed.  A value of "*" indicates that
                     all nested property XLink linking element locator attribute
                     (href) XLinks will be traversed and the referenced elements
                     returned if possible.  The range of valid values for this
                     attribute consists of positive integers plus "*".
                     If this attribute is not specified then no xlinks shall be 
                     resolved and the value of traverseXlinkExpiry attribute (if
                     it specified) may be ignored.
                  </xsd:documentation>
               </xsd:annotation>
            </xsd:attribute>
            <xsd:attribute name="traverseXlinkExpiry"
                           type="xsd:positiveInteger"
                           use="optional">
               <xsd:annotation>
                  <xsd:documentation>
                     The traverseXlinkExpiry attribute value is specified in
                     minutes.  It indicates how long a Web Feature Service
                     should wait to receive a response to a nested GetGmlObject
                     request.	
                     This attribute is only relevant if a value is specified 
                     for the traverseXlinkDepth attribute.
                  </xsd:documentation>
               </xsd:annotation>
            </xsd:attribute>
         </xsd:extension>
      </xsd:complexContent>
   </xsd:complexType>
   <xsd:simpleType name="ResultTypeType">
      <xsd:restriction base="xsd:string">
         <xsd:enumeration value="results">
            <xsd:annotation>
               <xsd:documentation>
                  Indicates that a complete response should be generated
                  by the WFS.  That is, all response feature instances
                  should be returned to the client.
               </xsd:documentation>
            </xsd:annotation>
         </xsd:enumeration>
         <xsd:enumeration value="hits">
            <xsd:annotation>
               <xsd:documentation>
                  Indicates that an empty response should be generated with
                  the "numberOfFeatures" attribute set (i.e. no feature
                  instances should be returned).  In this manner a client may
                  determine the number of feature instances that a GetFeature
                  request will return without having to actually get the 
                  entire result set back.
               </xsd:documentation>
            </xsd:annotation>
         </xsd:enumeration>
      </xsd:restriction>
   </xsd:simpleType>
   <xsd:element name="Query" type="wfs:QueryType">
      <xsd:annotation>
         <xsd:documentation>
            The Query element is used to describe a single query.
            One or more Query elements can be specified inside a
            GetFeature element so that multiple queries can be 
            executed in one request.  The output from the various
            queries are combined in a wfs:FeatureCollection element
            to form the response document.
         </xsd:documentation>
      </xsd:annotation>
   </xsd:element>
   <xsd:complexType name="QueryType">
      <xsd:annotation>
         <xsd:documentation>
            The Query element is of type QueryType.
         </xsd:documentation>
      </xsd:annotation>
     <xsd:sequence>
       <xsd:choice minOccurs="0" maxOccurs="unbounded">
          <xsd:element ref="wfs:PropertyName">
             <xsd:annotation>
                <xsd:documentation>
                   The Property element is used to specify one or more
                   properties of a feature whose values are to be retrieved
                   by a Web Feature Service.  
                   
                   While a Web Feature Service should endeavour to satisfy
                   the exact request specified, in some instance this may
                   not be possible.  Specifically, a Web Feature Service
                   must generate a valid GML3 response to a Query operation.
                   The schema used to generate the output may include 
                   properties that are mandatory.  In order that the output
                   validates, these mandatory properties must be specified
                   in the request.  If they are not, a Web Feature Service
                   may add them automatically to the Query before processing
                   it.  Thus a client application should, in general, be
                   prepared to receive more properties than it requested.
   
                   Of course, using the DescribeFeatureType request, a client
                   application can determine which properties are mandatory
                   and request them in the first place.
                </xsd:documentation>
             </xsd:annotation>
          </xsd:element>
          <xsd:element ref="wfs:XlinkPropertyName"/>
          <xsd:element ref="ogc:Function">
             <xsd:annotation>
                <xsd:documentation>
                   A function may be used as a select item in a query.
                   However, if a function is used, care must be taken
                   to ensure that the result type matches the type in the 
 
                </xsd:documentation>
             </xsd:annotation>
          </xsd:element>
       </xsd:choice>
       <xsd:element ref="ogc:Filter" minOccurs="0" maxOccurs="1">
          <xsd:annotation>
             <xsd:documentation>
                The Filter element is used to define spatial and/or non-spatial
                constraints on query.  Spatial constrains use GML3 to specify
                the constraining geometry.  A full description of the Filter
                element can be found in the Filter Encoding Implementation
                Specification.
             </xsd:documentation>
          </xsd:annotation>
       </xsd:element>
       <xsd:element ref="ogc:SortBy" minOccurs="0" maxOccurs="1">
          <xsd:annotation>
             <xsd:documentation>
                The SortBy element is used specify property names whose
                values should be used to order (upon presentation) the
                set of feature instances that satisfy the query.
             </xsd:documentation>
          </xsd:annotation>
       </xsd:element>
     </xsd:sequence>
     <xsd:attribute name="handle"
                    type="xsd:string" use="optional">
         <xsd:annotation>
            <xsd:documentation>
               The handle attribute allows a client application
               to assign a client-generated identifier for the 
               Query.  The handle is included to facilitate error
               reporting.  If one Query in a GetFeature request
               causes an exception, a WFS may report the handle
               to indicate which query element failed.  If the a
               handle is not present, the WFS may use other means
               to localize the error (e.g. line numbers).
            </xsd:documentation>
         </xsd:annotation>
     </xsd:attribute>
     <xsd:attribute name="typeName"
                    type="wfs:TypeNameListType" use="required">
        <xsd:annotation>
           <xsd:documentation>
              The typeName attribute is a list of one or more
              feature type names that indicate which types 
              of feature instances should be included in the
              reponse set.  Specifying more than one typename
              indicates that a join operation is being performed.
              All the names in the typeName list must be valid
              types that belong to this query's feature content
              as defined by the GML Application Schema.
           </xsd:documentation>
        </xsd:annotation>
     </xsd:attribute>
     <xsd:attribute name="featureVersion"
                    type="xsd:string" use="optional">
        <xsd:annotation>
           <xsd:documentation>
              For systems that implement versioning, the featureVersion
              attribute is used to specify which version of a particular
              feature instance is to be retrieved.  A value of ALL means
              that all versions should be retrieved.  An integer value
              'i', means that the ith version should be retrieve if it
              exists or the most recent version otherwise.
           </xsd:documentation>
        </xsd:annotation>
     </xsd:attribute>
     <xsd:attribute name="srsName" type="xsd:anyURI" use="optional">
        <xsd:annotation>
           <xsd:documentation>
              This attribute is used to specify a specific WFS-supported SRS
              that should be used for returned feature geometries.  The value
              may be the WFS StorageSRS value, DefaultRetrievalSRS value, or
              one of AdditionalSRS values.  If no srsName value is supplied,
              then the features will be returned using either the
              DefaultRetrievalSRS, if specified, and StorageSRS otherwise.
              For feature types with no spatial properties, this attribute
              must not be specified or ignored if it is specified.
           </xsd:documentation>
        </xsd:annotation>
     </xsd:attribute>
   </xsd:complexType>
   <xsd:simpleType name="Base_TypeNameListType">
      <xsd:list itemType="xsd:QName"/>
   </xsd:simpleType>
   <xsd:simpleType name="TypeNameListType">
      <xsd:restriction base="wfs:Base_TypeNameListType">
         <xsd:pattern value="((\w:)?\w(=\w)?){1,}">
            <xsd:annotation>