以下は私のHTMLマークアップです。私はBootstrapを使用し、それらの例の多くに従いました。それでも、W3C HTMLバリデーターを使用して検証すると、次のタイプのエラーが多数発生します。
"Element legend not allowed as child of element div in this context."
このエラーメッセージがわかりません。どういう意味ですか？HTMLをどのように変更すればよいですか？
<!doctype html>
<!-- Bootstrap customisations:
No responsiveness
@navbarBackground: #568FB6
@navbarBackgroundHighlight: lighten(#568FB6, 12%)
-->
<head>
<meta charset='utf-8'>
<meta http-equiv='X-UA-Compatible' content='IE=edge,chrome=1'>
<title>DeepFlow</title>
<link href='./img/favicon.ico' rel='icon'>
<link href='./css/bootstrap.css' rel='stylesheet'>
<link href='./css/font-awesome.css' rel='stylesheet'>
<link href='./css/global.css' rel='stylesheet'>
<link href='./css/login.css' rel='stylesheet'>
<link href='./css/custom.css' rel='stylesheet'>
<script src='./RGraph/libraries/RGraph.common.core.js'></script>
<script src='./RGraph/libraries/RGraph.common.annotate.js'></script>
<script src='./RGraph/libraries/RGraph.common.effects.js'></script>
<script src='./RGraph/libraries/RGraph.common.dynamic.js'></script>
<script src='./RGraph/libraries/RGraph.gauge.js'></script>
<script src='./RGraph/libraries/RGraph.line.js'></script>
<script src='./js/jquery.js'></script>
<script>jQuery.fx.speeds._default = 800;</script>
<script src='./js/underscore.js'></script>
<script src='./js/bootstrap.js'></script>
<script src='./js/ajax.js'></script>
<script src='./js/navbar.js'></script>
<script src='./js/login.js'></script>
<script src='./js/users.js'></script>
<script src='./js/editUser.js'></script>
<script src='./js/addUser.js'></script>
<script src='./js/statistics.js'></script>
<script src='./js/protocols.js'></script>
<script src='./js/export.js'></script>
<script src='./js/tuple.js'></script>
<script src='./js/network.js'></script>
</head>
<div class='navbar navbar-fixed-top' style='display:none'>
<div class='navbar-inner'>
<div class='container'>
<div class='brand'>DeepFlow</div>
<div id='navbar-container'>
<ul class='nav panes-nav'>
<li id='statistics-label'><a>Statistics</a></li>
<li id='protocols-label'><a>Protocols</a></li>
<li id='tuples-label'><a>Tuples</a></li>
<li id='exports-label'><a>Exports</a></li>
<li id='users-label'><a>Users</a></li>
<li id='network-label'><a>Network</a></li>
</ul>
<ul class='nav pull-right'>
<li id='sign-out'><a>Log out</a></li>
</ul>
</div>
</div>
</div>
</div>
<div id='wrap'>
<br>
<br>
<br>
<div class='container'>
<div class='alert alert-error' style='display:none'>
<span id='error-message'></span>
<button type='button' class='close' data-dismiss='alert'>×</button>
</div>
<div class='hero-unit' id='login-unit'>
<h2>Welcome to DeepFlow</h2>
<p>Please log in</p>
<center id='login-box' class='pull-right control-group'>
<div class='clearfix'>
<input type='text' placeholder='Username' id='login-username'/>
</div>
<div class='clearfix'>
<input type='password' placeholder='Password' id='login-password'/>
</div>
<button class='btn btn-primary' type='submit' id='login-button'>Log in</button>
</center>
</div>
<div class='row pane' id='statistics-pane' style='display:none'>
<legend>Network</legend>
<div class='form-horizontal well'>
<div class='offset1'>
<div class='control-group statistics-group'>
<label class='control-label graph-label'>
<div>Packets per second</div>
<p class='live-statistic' data-ending='' data-precision='0'></p>
</label>
<div class='controls'>
<canvas id='pps_graph' width='500' height='100'>[No canvas support]</canvas>
</div>
</div>
<div class='control-group statistics-group'>
<label class='control-label graph-label'>
<div>Throughput</div>
<p class='live-statistic' data-ending=' kB/s' data-precision='0'></p>
</label>
<div class='controls'>
<canvas id='throughput_graph' width='500' height='100'>[No canvas support]</canvas>
</div>
</div>
<div class='statistics-group'>
<label class='control-label graph-label'id='packets-dropped-group'>
<div>Packets dropped</div>
<p class='live-statistic' data-ending='' data-precision='0'></p>
</label>
<div class='controls'>
<canvas id='packets_dropped_graph' width='500' height='100'>[No canvas support]</canvas>
</div>
</div>
</div>
</div>
<legend>System</legend>
<div class='form-horizontal well'>
<div class='offset1'>
<div class='control-group statistics-group'>
<label class='control-label graph-label'>
<div>CPU usage</div>
<p class='live-statistic' data-ending=' %' data-precision='2'></p>
</label>
<div class='controls'>
<canvas id='cpu_graph' width='500' height='100'>[No canvas support]</canvas>
</div>
</div>
<div class='statistics-group'>
<label class='control-label graph-label'>
<div>Memory usage</div>
<p class='live-statistic' data-ending=' k' data-precision='0'></p>
</label>
<div class='controls'>
<canvas id='memory_graph' width='500' height='100'>[No canvas support]</canvas>
</div>
</div>
</div>
</div>
</div>
<div class='row pane' id='protocols-pane' style='display:none'>
<legend>Protocol list</legend>
<table class='table table-hover table-condensed offset3' id='protocol-table'>
<thead>
<tr>
<th>Protocol</th>
<th id='protocol-status-column'></th>
</tr>
</thead>
<tbody id='protocol-rows'>
</tbody>
</table>
</div>
<div class='row pane' id='tuples-pane' style='display:none'>
<legend>List of tuples</legend>
<table class='table table-hover offset3' id='tuple-table'>
<thead>
<tr>
<th>Name</th>
<th>Total</th>
<th id='tuples-status-column'></th>
</tr>
</thead>
<tbody id='tuples-rows'>
</tbody>
</table>
</div>
<div class='row pane' id='exports-pane' style='display:none'>
<legend>Configure export destinations</legend>
<table class='table table-hover' id='exports-table'>
<thead>
<tr>
<th>Name</th>
<th>URL</th>
<th>IP</th>
<th>Port</th>
<th>Format</th>
<th id='exports-edit-column'></th>
</tr>
</thead>
<tbody id='exports-rows'>
</tbody>
</table>
<div class='modal hide fade' id='edit-export-modal'>
<div class='modal-header'>
<span type='button' class='close' data-dismiss='modal' aria-hidden='true'>×</span>
<h3>Edit export <code id='edit-export-old'></code></h3>
</div>
<div class='modal-body'>
<form class='form-horizontal'>
<div class='control-group'>
<label class='control-label'>New IP</label>
<div class='controls'>
<input type='text' id='edit-export-ip' placeholder='IP'/>
</div>
</div>
<div class='control-group'>
<label class='control-label'>New port</label>
<div class='controls'>
<input type='text' id='edit-export-port' placeholder='Port'/>
</div>
</div>
<label class='control-label'>New format</label>
<div class='controls'>
<input type='text' id='edit-export-format' placeholder='Format'/>
</div>
</form>
</div>
<div class='modal-footer'>
<span class='btn' id='edit-export-close'>Close</span>
<span class='btn btn-primary' id='edit-export-save'>Save changes</span>
</div>
</div>
</div>
<div class='row pane' id='users-pane' style='display:none'>
<div class='span6'>
<legend>List of users</legend>
<table class='table table-hover' id='users-table'>
<thead>
<tr>
<th>User</th>
<th>Rights</th>
<th id='users-edit-column'></th>
</tr>
</thead>
<tbody id='user-rows'>
</tbody>
</table>
</div>
<div id='new-user-box' class='span6'>
<legend>Add a new user</legend>
<form class='form-horizontal well'>
<div class='control-group'>
<label class='control-label'>Username</label>
<div class='controls'>
<input type='text' class='username' id='new-user-username' placeholder='Username'/>
</div>
</div>
<div class='control-group'>
<label class='control-label'>Password</label>
<div class='controls'>
<input type='password' class='password' id='new-user-password' placeholder='Password'/>
</div>
</div>
<div class='control-group'>
<label class='control-label'>Rights</label>
<div class='controls'>
<div class='btn-group' data-toggle='buttons-radio' id='new-user-rights'/>
<span class='btn'>Administrator</span>
<span class='btn' id='new-user-operator'>Operator</span>
</div>
</div>
</div>
<div class='controls'>
<span class='btn btn-primary' id='new-user-button'>Add new user</span>
</div>
</form>
</div>
<div class='modal hide fade' id='edit-user-modal'>
<div class='modal-header'>
<span class='close' data-dismiss='modal' aria-hidden='true'>×</span>
<h3>Edit user <code id='edit-user-old-username'></code></h3>
</div>
<div class='modal-body'>
<form class='form-horizontal'>
<div class='control-group'>
<label class='control-label'>New username</label>
<div class='controls'>
<input type='text' class='username' id='edit-user-username' placeholder='(Leave unchanged)'/>
</div>
</div>
<div class='control-group'>
<label class='control-label'>New password</label>
<div class='controls'>
<input type='password' class='password' id='edit-user-password' placeholder='(Leave unchanged)'/>
</div>
</div>
<label class='control-label'>New rights</label>
<div class='controls'>
<div class='btn-group' data-toggle='buttons-radio' id='edit-user-rights'>
<span class='btn'>Administrator</span>
<span class='btn'>Operator</span>
</div>
</div>
</form>
</div>
<div class='modal-footer'>
<span class='btn btn-danger pull-left' data-action='remove'><i class='icon-trash'></i> Remove</span>
<span class='btn' data-action='close'>Close</span>
<span class='btn btn-primary' data-action='save'>Save changes</span>
</div>
</div>
</div>
<div class='pane' id='network-pane' style='display:none'>
<div class='row'>
<div class='alert alert-info' style='display:none'>
Use this pane to configure the server network. Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
</div>
<form class='span6 form-horizontal'>
<legend>Basic configurations</legend>
<div class='control-group'>
<label class='control-label'>IP address</label>
<div class='controls'>
<input type='text' id='network-ip' placeholder='IP address'/>
</div>
</div>
<div class='control-group'>
<label class='control-label'>Subnet mask</label>
<div class='controls'>
<input type='text' id='network-mask' placeholder='Subnet mask'/>
</div>
</div>
<div class='control-group'>
<label class='control-label'>Default gateway</label>
<div class='controls'>
<input type='text' id='network-gateway' placeholder='Default gateway'/>
</div>
</div>
</form>
<form class='span6 form-horizontal'>
<legend>Optional fields</legend>
<div class='control-group'>
<label class='control-label'>DNS hostname</label>
<div class='controls'>
<input type='text' id='network-dns' placeholder='DNS hostname'/>
</div>
</div>
<div class='control-group'>
<label class='control-label'>NTP server hostname</label>
<div class='controls'>
<input type='text' id='network-ntp' placeholder='NTP server hostname'/>
</div>
</div>
</form>
</div>
<br>
<br>
<br>
<center>
<span class='btn btn-large btn-primary' id='network-save'>Save and reboot server now</span>
</center>
</div>
<div id='push'></div>
</div>
</div>
<div id='footer'>
<div class='container'>
<span class='muted credit'>© Copyright 2013 Qosmos SA. All rights reserved.</span>
<img id='logo' src='./img/logo_grey.png' alt='logo'/>
</div>
</div>