HTML Base for a Best-Practices, Accessible Form

gistfile1.txt

<form role="form"> <!-- if a search form make the role="search" -->
    <label for="name">Name
        <input type="text" id="name" name="name" size="27" class="required"/>
    </label>
    <label for="comments">Comments
        <textarea name="comments" id="comments"></textarea>
    </label>
    <label for="robot_val">I am a *</label>
        robot: <input type="radio" name="robot_val" value="robot" role="menuitemradio" checked="checked" />
        human: <input type="radio" name="robot_val" value="human" role="menuitemradio" />
    <input type="hidden" name="stage" value="process"/>
    <input type="submit" name="rick" value="Submit" class="submit" role="button"/>
   <!-- i make the name="rick" because the NAME SHOULD NEVER BE SUBMIT and @rwaldron taught me this -->
    </form>
    
    <!-- started in haml -->
     <!-- %form{:for => "form"} -->
     <!-- %label{:for => "name"}name -->
     <!-- = text_field_tag :name -->