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    <h1>OpenLink Virtuoso Universal Server: Documentation - login-form</h1>
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    <h2>login-form</h2>
    <div class="refpurpose">A form to be shown if the user is not logged in.</div>
    <div class="funcsynopsis">
        <span class="funcdef">
            &lt;<a href="vc_login_form.html">
          <span class="function">login-form</span>
        </a> 
            name (required) 
          
            annotation (optional) 
          
            initial-enable (optional) 
          
            enabled (optional) 
          
            instantiate (optional) 
          
            control-udt (optional) 
          
            xsd-stub-xhtml (optional) 
          
            width (optional) 
          
            height (optional) 
          
            required (required) 
          
            title (optional) 
          
            user-title (optional) 
          
            password-title (optional) 
          
            submit-title (optional) 
          
            debug-srcfile (optional) 
          
            debug-srcline (optional) 
          
            debug-log (optional) 
 /&gt;</span>
    </div>
  
  
  
  <div class="refsect1">
    <div class="refsect1title">Description</div>
    <p>
login-form is the control for getting login information.  This may only appear inside a login.
Its function will depend on the type of login being attempted.  If the type is digest, this is a button which, when submitted, will send the digest challenge.
			</p>
    <p>
If the url or cookie session mode is chosen, this will be a form of 2 fields with user name and password and a submit button.
			</p>
    <p>
if the standard form is not suitable, this can be an arbitrary form.  This must post  buttons values named &quot;username&quot; and &quot;password&quot; and a submit button named &quot;login&quot;.  No children need be specified if the default form is OK.
			</p>
    <p>
If the redirect attribute of template[@type=if-no-login] is not specified,
the contents of this child are instantiated and shown in the place of the login control.
This can be arbitrary content.
			</p>
  </div>
  <div class="refsect1">
    <div class="refsect1title">Attributes</div>
  <div class="formalpara">
   <strong>name = <a href="vc_type_SqlName.html">SqlName</a>
   </strong>
      <p>A page level unique name identifying a control.</p>
  </div>
  <div class="formalpara">
      <strong>annotation</strong>
      <p>A human readable comment.</p>
  </div>
  <div class="formalpara">
   <strong>initial-enable = <a href="vc_type_CalculateableValue.html">CalculateableValue</a>
   </strong>
      <p>Determines  whether  a control is initially visible. True by default. Could be data-bound to an SQL expression.</p>
  </div>
  <div class="formalpara">
   <strong>enabled = <a href="vc_type_CalculateableValue.html">CalculateableValue</a>
   </strong>
      <p>Determines  whether  a control is visible. True by default. Could be data-bound to an SQL expression.</p>
  </div>
  <div class="formalpara">
   <strong>instantiate = <a href="vc_type_CalculateableValue.html">CalculateableValue</a>
   </strong>
      <p>Determines whether a control instantiate its children. It is true by default. It could be data-bound to an SQL expression. Unlike most of calcucateable attributes, the value of this attribute for a control is calcluated before calling &#39;on-init&#39; event handler of the control; other values are calculated before calling &#39;before-data-bind&#39; event handler.</p>
  </div>
  <div class="formalpara">
   <strong>control-udt = <a href="vc_type_SqlName.html">SqlName</a>
   </strong>
      <p>At run time every control is represented as an instance of some user-defined type (UDT). VSPX compiles selects the UDT to use depending on name of the XML element that represents the control and maybe some of its attributes. In some specific cases the application developer may instruct VSPX compiler to use some other UDT, e.g. an application-specific UDT that is derived from the preset one. If specified, the value of &#39;control-udt&#39; attribute should be equal to the name of the desired target UDT.</p>
  </div>
  <div class="formalpara">
      <strong>xsd-stub-xhtml</strong>
      <p>This attribute is for internal use only. It has no effect if added to the source VSPX file.</p>
  </div>
  <div class="formalpara">
      <strong>width</strong>
      <p>Visible width of the control when it is displayed in WYSIWYG tools when the source VSPX text is edited.
The value of this attribute will not be used when the resulting HTML is rendered.</p>
  </div>
  <div class="formalpara">
      <strong>height</strong>
      <p>Visible width of the control when it is displayed in WYSIWYG tools when the source VSPX text is edited.
The value of this attribute will not be used when the resulting HTML is rendered.</p>
  </div>
  <div class="formalpara">
      <strong>required</strong>
      <p>
If digest is the mode, then this means that the login is mandatory and that instead of displaying the login button which will send the challenge if pressed, the challenge will be sent automatically.
			   </p>
  </div>
  <div class="formalpara">
      <strong>title</strong>
      <p>Title of login button if digest is attempted.
			   </p>
  </div>
  <div class="formalpara">
      <strong>user-title</strong>
      <p>Title of user name field
			   </p>
  </div>
  <div class="formalpara">
      <strong>password-title</strong>
      <p>Title of password field
			   </p>
  </div>
  <div class="formalpara">
      <strong>submit-title</strong>
      <p>Title of submit button
			   </p>
  </div>
  <div class="formalpara">
      <strong>debug-srcfile</strong>
      <p>URI of the source document where the tag comes from.</p>
  </div>
  <div class="formalpara">
      <strong>debug-srcline</strong>
      <p>Line number in the source document where the tag comes from.</p>
  </div>
  <div class="formalpara">
      <strong>debug-log</strong>
      <p>This defines what sort of data are saved to the debugging log.
</p>
  </div>
  </div>
  <div class="refsect1">
    <div class="refsect1title">Declaration of type vspx_login_form</div>
    <p>
</p>
    <div>
        <pre class="screen">
create type vspx_login_form under vspx_form
as
  (
   vlf_title varchar,
   vlf_user_title varchar,
   vlf_password_title varchar,
   vlf_submit_title varchar,
   vlf_login vspx_login
  ) temporary self as ref
constructor method vspx_login_form (name varchar,  parent vspx_control),
constructor method vspx_login_form (name varchar, title varchar, user_title varchar, password_title varchar, submit_tile varchar, login vspx_login),
overriding method vc_render () returns any
</pre>
      </div>
  </div>
  <div class="refsect1">
    <div class="refsect1title">Examples</div>
   <a name="vc_ex_login_form__0" />
      <div class="example">
      <div class="exampletitle">
  A simple default login-form
</div>
      <p>
&lt;?xml version=&quot;1.0&quot;?&gt;
&lt;!--
 -  
 -  $Id: login_form__0.vspx,v 1.2 2006/08/16 00:04:15 source Exp $
 -
 -  This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
 -  project.
 -  
 -  Copyright (C) 1998-2006 OpenLink Software
 -  
 -  This project is free software; you can redistribute it and/or modify it
 -  under the terms of the GNU General Public License as published by the
 -  Free Software Foundation; only version 2 of the License, dated June 1991.
 -  
 -  This program is distributed in the hope that it will be useful, but
 -  WITHOUT ANY WARRANTY; without even the implied warranty of
 -  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 -  General Public License for more details.
 -  
 -  You should have received a copy of the GNU General Public License along
 -  with this program; if not, write to the Free Software Foundation, Inc.,
 -  51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 -  
 -  


This example will render just a login form

</p>
      <div>
          <pre class="screen">
&lt;v:page name=&quot;login_form__0&quot; xmlns:v=&quot;http://www.openlinksw.com/vspx/&quot;&gt;
  &lt;html&gt;
    &lt;head&gt;&lt;title&gt;VSPX samples | v:login-form&lt;/title&gt;&lt;/head&gt;
    &lt;body&gt;
      &lt;v:login name=&quot;login_0&quot; mode=&quot;url&quot; user-password-check=&quot;sql_user_password_check&quot; realm=&quot;vspx&quot;&gt;
        &lt;v:login-form name=&quot;login_form_0&quot;
          required=&quot;1&quot;
          title=&quot;Login&quot;
          user-title=&quot;User Name&quot;
          password-title=&quot;Password&quot;
          submit-title=&quot;Login&quot;/&gt;
        &lt;/v:login&gt;
    &lt;/body&gt;
  &lt;/html&gt;
&lt;/v:page&gt;
</pre>
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