title: Structure of docx field
body: <p>A field in docx is represented this way.</p>
  
  <pre><code>  &lt;w:r&gt;
      &lt;w:fldChar w:fldCharType="begin"/&gt;
    &lt;/w:r&gt;
    AAA
    &lt;w:r&gt;
      &lt;w:instrText xml:space="preserve"&gt; NOTEREF _Ref111111 \h &lt;/w:instrText&gt;
    &lt;/w:r&gt;
    BBB
    &lt;w:r&gt;
      &lt;w:fldChar w:fldCharType="separate"/&gt;
    &lt;/w:r&gt;
    CONTENT
    &lt;w:r&gt;
      &lt;w:fldChar w:fldCharType="end"/&gt;
    &lt;/w:r&gt;
  </code></pre>
  
  <p>The field content goes to the CONTENT placeholder.  My question is: can anything go to AAA or BBB?  Or they are always empty?  I suspect the creators of this format had something in mind to have four separator elements instead of just two, but I haven't seen any examples of using this.</p>