This parameter allows you to control how namespaces are sorted throughout 
the whole documentation.
<p>
It directly affects:
<ol>
<li>
  The order in which the namespaces are listed in the <i>Overview Frame</i>
  (see also <i>"Navigation | Overview Frame"</i> parameter).
</li>
<li style="margin-top:10pt">
  In the case of <b>framed documentation</b> 
  (generated by <code>FramedDoc.tpl</code> main template),
  the order in which namespace become fully processed and documented.
  <p style="margin-top:10pt">
  That determines which namespace gets documented the first,
  which, in turn, may affect the initial content of the frames:
  <ul>
    <li><i>List Frame</i>. (See parameter: <i>"Navigation | List Frame"</i>)</li>
    <li><i>Detail Frame</i>. (See parameter: <i>"Navigation | Detail Frame"</i>)</li>
  </ul>
</li>
<li>
  In the case of <b>single file documentation</b> (generated by <code>SingleDoc.tpl</code> main template),
  the order in which the full details of namespaces
  follow in the file.
  <p style="margin-top:10pt">
  Those details may include the <i>Namespace Overview</i> and the details
  of all components belonging to the namespace (<i>Component Documentation</i> blocks).
</li>
</ol>

Additionally, this parameter provides the default value for another parameter:
<ul>
  <li><i>Details | Overview Summary | Namespace Summary | Sorting</i></li>
</ul>
which controls the sorting of the namespace summary table.
<p>
The parameter has the following meaning:
<ul>
<li>
  When it is selected (<b><code>true</code></b>),
  the namespaces will be sorted alphabetically by their URIs (ignoring letter case).
</li>
<li style="margin-top:10pt">
  When the parameter is unselected (<b><code>false</code></b>),
  the namespaces will not be sorted anyhow. In that case, the ordering of namespaces
  will be defined by how the initial XML schemas (to be documented) have been specified
  as well as how these schemas import other XML schemas.
  <p style="margin-top:10pt">
  For more information about this, see also <i>"Generate Details | For schemas"</i> parameter group.
</li>
</ul>