wfs.xsd

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            <xsd:attribute name="expiry"
                           type="xsd:positiveInteger"
                           use="optional" default="5">
               <xsd:annotation>
                  <xsd:documentation>
                     The expiry attribute is used to set the length
                     of time (expressed in minutes) that features will
                     remain locked as a result of a LockFeature
                     request.  After the expiry period elapses, the
                     locked resources must be released.  If the 
                     expiry attribute is not set, then the default
                     value of 5 minutes will be enforced.
                  </xsd:documentation>
               </xsd:annotation>
            </xsd:attribute>
            <xsd:attribute name="lockAction"
                           type="wfs:AllSomeType"
                           use="optional" default="ALL">
               <xsd:annotation>
                  <xsd:documentation>
                     The lockAction attribute is used to indicate what
                     a Web Feature Service should do when it encounters
                     a feature instance that has already been locked by
                     another client application.
      
                     Valid values are ALL or SOME.
      
                     ALL means that the Web Feature Service must acquire
                     locks on all the requested feature instances.  If it
                     cannot acquire those locks then the request should
                     fail.  In this instance, all locks acquired by the
                     operation should be released.
       
                     SOME means that the Web Feature Service should lock
                     as many of the requested features as it can.
                  </xsd:documentation>
               </xsd:annotation>
            </xsd:attribute>
         </xsd:extension>
      </xsd:complexContent>
   </xsd:complexType>
   <xsd:simpleType name="AllSomeType">
      <xsd:restriction base="xsd:string">
         <xsd:enumeration value="ALL"/>
         <xsd:enumeration value="SOME"/>
      </xsd:restriction>
   </xsd:simpleType>
   <xsd:complexType name="LockType">
      <xsd:annotation>
         <xsd:documentation>
            This type defines the Lock element.  The Lock element
            defines a locking operation on feature instances of 
            a single type. An OGC Filter is used to constrain the
            scope of the operation.  Features to be locked can be
            identified individually by using their feature identifier
            or they can be locked by satisfying the spatial and 
            non-spatial constraints defined in the filter.
         </xsd:documentation>
      </xsd:annotation>
      <xsd:sequence>
         <xsd:element ref="ogc:Filter" minOccurs="0" maxOccurs="1"/>
      </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 request identifier
               to a Lock action.  The handle is included to 
               facilitate error reporting.  If one of a set of
               Lock actions failed while processing a LockFeature
               request, a WFS may report the handle in an exception
               report to localize the error.  If a handle is not
               present then a WFS may employ some other means of 
               localizing the error (e.g. line number).
            </xsd:documentation>
         </xsd:annotation>
      </xsd:attribute>
      <xsd:attribute name="typeName" type="xsd:QName" use="required">
        <xsd:annotation>
           <xsd:documentation>
              The value of the typeName attribute is the name 
              of the feature type to be updated. The name
              specified must be a valid type that belongs to
              the feature content as defined by the GML
              Application Schema.
           </xsd:documentation>
        </xsd:annotation>
      </xsd:attribute>
   </xsd:complexType>
   <!-- RESPONSE -->
   <xsd:element name="LockFeatureResponse"
                type="wfs:LockFeatureResponseType">
      <xsd:annotation>
         <xsd:documentation>
            The LockFeatureResponse element contains a report
            about the completion status of a LockFeature request.
         </xsd:documentation>
      </xsd:annotation>
   </xsd:element>
   <xsd:complexType name="LockFeatureResponseType">
      <xsd:annotation>
         <xsd:documentation>
            The LockFeatureResponseType is used to define an
            element to contains the response to a LockFeature
            operation.
         </xsd:documentation>
      </xsd:annotation>
      <xsd:sequence>
         <xsd:element ref="wfs:LockId">
            <xsd:annotation>
               <xsd:documentation>
                  The LockFeatureResponse includes a LockId element
                  that contains a lock identifier.  The lock identifier
                  can be used by a client, in subsequent operations, to
                  operate upon the locked feature instances.
               </xsd:documentation>
            </xsd:annotation>
         </xsd:element>
         <xsd:element name="FeaturesLocked"
                      type="wfs:FeaturesLockedType" minOccurs="0">
            <xsd:annotation>
               <xsd:documentation>
                  The LockFeature or GetFeatureWithLock operations
                  identify and attempt to lock a set of feature 
                  instances that satisfy the constraints specified 
                  in the request.  In the event that the lockAction
                  attribute (on the LockFeature or GetFeatureWithLock
                  elements) is set to SOME, a Web Feature Service will
                  attempt to lock as many of the feature instances from
                  the result set as possible.

                  The FeaturesLocked element contains list of ogc:FeatureId
                  elements enumerating the feature instances that a WFS
                  actually managed to lock.
               </xsd:documentation>
            </xsd:annotation>
         </xsd:element>
         <xsd:element name="FeaturesNotLocked"
                      type="wfs:FeaturesNotLockedType" minOccurs="0">
            <xsd:annotation>
               <xsd:documentation>
                  In contrast to the FeaturesLocked element, the
                  FeaturesNotLocked element contains a list of 
                  ogc:Filter elements identifying feature instances
                  that a WFS did not manage to lock because they were
                  already locked by another process.
               </xsd:documentation>
            </xsd:annotation>
         </xsd:element>
      </xsd:sequence>
   </xsd:complexType>
   <xsd:complexType name="FeaturesLockedType">
     <xsd:sequence maxOccurs="unbounded">
       <xsd:element ref="ogc:FeatureId"/>
     </xsd:sequence>
   </xsd:complexType>
   <xsd:complexType name="FeaturesNotLockedType">
     <xsd:sequence maxOccurs="unbounded">
       <xsd:element ref="ogc:FeatureId"/>
     </xsd:sequence>
   </xsd:complexType>

   <!-- ================================================================== -->
   <!-- =   TRANSACTION Request and Response                             = -->
   <!-- ================================================================== -->
   <!-- REQUEST -->
   <xsd:element name="Transaction" type="wfs:TransactionType">
      <xsd:annotation>
         <xsd:documentation>
            This is the root element for a Transaction request.
            A transaction request allows insert, update and 
            delete operations to be performed to create, change
            or remove feature instances.
         </xsd:documentation>
      </xsd:annotation>
   </xsd:element>
   <xsd:complexType name="TransactionType">
      <xsd:annotation>
         <xsd:documentation>
            The TransactionType defines the Transaction operation.  A
            Transaction element contains one or more Insert, Update
            Delete and Native elements that allow a client application
            to create, modify or remove feature instances from the 
            feature repository that a Web Feature Service controls.
         </xsd:documentation>
      </xsd:annotation>
      <xsd:complexContent>
         <xsd:extension base="wfs:BaseRequestType">
            <xsd:sequence>
               <xsd:element ref="wfs:LockId" minOccurs="0">
                  <xsd:annotation>
                     <xsd:documentation>
                        In order for a client application to operate upon
                        locked feature instances, the Transaction request
                        must include the LockId element.  The content of
                        this element must be the lock identifier the client
                        application obtained from a previous
                        GetFeatureWithLock or LockFeature operation.

                        If the correct lock identifier is specified the Web
                        Feature Service knows that the client application may
                        operate upon the locked feature instances.

                        No LockId element needs to be specified to operate upon
                        unlocked features.
                     </xsd:documentation>
                  </xsd:annotation>
               </xsd:element>
               <xsd:choice minOccurs="0" maxOccurs="unbounded">
                  <xsd:element ref="wfs:Insert"/>
                  <xsd:element ref="wfs:Update"/>
                  <xsd:element ref="wfs:Delete"/>
                  <xsd:element ref="wfs:Native"/>
               </xsd:choice>
            </xsd:sequence>
            <xsd:attribute name="releaseAction"
                           type="wfs:AllSomeType" use="optional">
               <xsd:annotation>
                  <xsd:documentation>
                     The releaseAction attribute is used to control how a Web
                     Feature service releases locks on feature instances after
                     a Transaction request has been processed.

                     Valid values are ALL or SOME.

                     A value of ALL means that the Web Feature Service should
                     release the locks of all feature instances locked with the
                     specified lockId regardless or whether or not the features
                     were actually modified.

                     A value of SOME means that the Web Feature Service will 
                     only release the locks held on feature instances that 
                     were actually operated upon by the transaction.  The
                     lockId that the client application obtained shall remain
                     valid and the other, unmodified, feature instances shall
                     remain locked.
                    
                     If the expiry attribute was specified in the original
                     operation that locked the feature instances, then the
                     expiry counter will be reset to give the client
                     application that same amount of time to post subsequent
                     transactions against the locked features.
                  </xsd:documentation>
               </xsd:annotation>
            </xsd:attribute>
         </xsd:extension>
      </xsd:complexContent>
   </xsd:complexType>
   <xsd:element name="LockId" type="xsd:string">
      <xsd:annotation>
         <xsd:documentation>
            The LockId element contains the value of the lock identifier
            obtained by a client application from a previous GetFeatureWithLock
            or LockFeature request.
         </xsd:documentation>
      </xsd:annotation>
   </xsd:element>
   <xsd:element name="Insert" type="wfs:InsertElementType">
      <xsd:annotation>
         <xsd:documentation>
            The Insert element is used to indicate that the Web Feature
            Service should create a new instance of a feature type.  The
            feature instance is specified using GML3 and one or more 
            feature instances to be created can be contained inside the
            Insert element.
         </xsd:documentation>
      </xsd:annotation>
   </xsd:element>
   <xsd:complexType name="InsertElementType">
      <xsd:annotation>
         <xsd:docu