    <blockquote><table border=0 cellspacing=0 cellpadding=0 class=Prototype><tr><td>bit physical = 1
  </td></tr></table></blockquote>This bit provides a filtering mechanism for fields.</div></div><div class=CToolTip id="tt8"><div class=CVariable>
    <blockquote><table border=0 cellspacing=0 cellpadding=0 class=Prototype><tr><td>bit abstract = 1
  </td></tr></table></blockquote>This bit provides a filtering mechanism for fields.</div></div><div class=CToolTip id="tt9"><div class=CVariable>
    <blockquote>