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      <title>File Format</title>
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      <div class="title_topic3" id="xps10_pagetitle">File Format</div>
      <hr noshade="true"><a name="ndxgenid_checkmate1135"></a><p class="para_topic">The first line of the programming file must contain the #! UG/KF syntax for specifying the version number of the NX Knowledge Fusion interpreter:</p>
      <p class="para_topic">#! UG/KF &lt;UG Version Number&gt;</p>
      <p class="para_topic">Note the #! &nbsp;here. </p>
      <p class="para_topic">You may apply the &lt;UG Version Number&gt; to control access to these DFA files. Earlier versions of UG cannot access these DFA files. For example: </p>
      <p class="para_topic">#! UG/KF 19.0</p>
      <p class="para_topic">Add the File Description comments between a pair of a &quot;#+&quot; and a &quot;#-.&quot; &nbsp;This marks off a comment section for the purpose of defining the basic description of the file.</p>
      <p class="para_topic">The keywords DefClass or Defun must not appear anywhere in the comment sections described above.</p>
      <p class="para_topic">Add the Knowledge Fusion code after the File Description section. Define only one DefClass per DFA file. &nbsp;Define as many Defuns in a single DFA file.</p>
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