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bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00074.html#a63eba0158afbac2959449c8a7d9b806d">is_valid</a> (format Format)</td></tr>
<tr class="memdesc:a63eba0158afbac2959449c8a7d9b806d"><td class="mdescLeft">&#160;</td><td class="mdescRight">Evaluate whether a format value 