title: Kohana validation complete rules list
body: <p>i can't find complete list of kohana validation rules list, can someone point me to the right documentation page? btw if some one doesn't understand what i'm talking about:</p>
  
  <pre><code>        return Validation::factory($arr)
              -&gt;rule('tenant_last_name', 'not_empty')-&gt;rule('tenant_first_name', 'not_empty') // Name
              -&gt;rule('tenant_ssn', 'not_empty')-&gt;rule('tenant_ssn', 'numeric') //SNN
              -&gt;rule('tenant_email', 'email')-&gt;rule('tenant_email', 'not_empty') //Email
              -&gt;rule('tenant_phone', 'numeric')-&gt;rule('tenant_phone', 'not_empty') //phone
  </code></pre>