      <p>
                    awk
                  </p>
                </td>
<td>
                  <p>
                    Yes
                  </p>
                </td>
<td>
                  <p>
                    Specifies that the grammar recognized by the regular expression
                    engine is the same as that used by POSIX utility awk in IEEE
                    Std 1003.1-2001, Portable Operating System Interface (POSIX ),
                    Shells and Utilities, Section 4, awk (FWD.