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Conversion rules

<html> <p>QBF works by transforming form arrays from one form to another. Here are the default rules. Note that a TriState is a set of 3 radios for Unchecked/Checked/Don't care</p>

<table>

<tr>
  <th>Source Type</th>
  <th>Modified type</th>
  </tr>
<tr>
  <td>checkbox</td>
  <td>Tristate</td>
  </tr>
<tr>
  <td>checkboxes</td>
  <td>set of Tristates</td>
  </tr>
<tr>
  <td>date</td>
  <td>date with unset</td>
  </td>
<tr>
  <td>fieldset</td>
  <td>fieldset</td>
  <td>empty fieldsets are removed</td>
  </tr>
<tr>
  <td>file</td>
  <td>removed</td>
  </tr>
<tr>
  <td>password</td>
  <td>removed</td>
  </tr>
<tr>
  <td>radio</td>
  <td>removed</td>
  </tr>
<tr>
  <td>radios</td>
  <td>radios with unset</td>
  </tr>
<tr>
  <td>select</td>
  <td>select multiple</td>
  <td>multiple choices apply as OR</td>
  </tr>
<tr>
  <td>textarea</td>
  <td>textfield</td>
  <td>#cols honored</td>
  </tr>
<tr>
  <td>textfield</td>
  <td>textfield</td>
  <td>#cols honored</td>
  </tr>
<tr>
  <td>weight</td>
  <td>weight with unset</td>
  </tr>
</table>