<h1 align="center">@liens et catgories connexes</h1>
  
<ul class="toc">
  <li><a href="#intro">Introduction</a></li>
  <li><a href="#@links">Quand emploie-t-on des @liens ?</a></li>
  <li><a href="#relcats">Quand emploie-t-on des liens vers des catgories connexes ?</a></li>
  <li><a href="#examples">Autres exemples</a></li>
  <li><a href="#seealso">Voir aussi</a></li>
</ul>
  
<h3><a name="intro"></a>Introduction</h3>
  @links and related categories (relcats) are both methods of linking together 
  two categories. The type of link used depends on the relationship between the 
  categories. 
  <h3> <a name="@links"></a>When are @links Used?</h3>
  @links are used to link from one category to another that could theoretically 
  be a subcategory of the first. 
  <p>For instance, consider: <a href="http://dmoz.org:8080/Health/Medicine/Surgery/">Health/Medicine/Surgery</a>. 
    It contains the following @link: 
  <p align="center"><a href="http://dmoz.org:8080/Health/Consumer_Support_Groups/Surgery">Support 
    Groups@ </a> 
  <p>Support Groups@ is a pointer to <a href="http://dmoz.org:8080/Health/Consumer_Support_Groups/Surgery/">Health/Consumer_Support_Groups/Surgery</a>. 
    An @link is used because <a href="http://dmoz.org:8080/Health/Consumer_Support_Groups/Surgery/">Health/Consumer_Support_Groups/Surgery</a> 
    could logically be a sub-category of <a href="http://dmoz.org:8080/Health/Medicine/Surgery/">Health/Medicine/Surgery</a> 
    . i.e. surgery support groups are a subset of surgery. 
  <h3><a name="relcats"></a>When are Related Category Links Used?</h3>
  <p> Health/Medicine/Surgery also contains a related category (relcat) 
    link: 
  <p align="center"><a href="http://dmoz.org:8080/Health/Medicine/Medical_Specialties/">Health: 
    Medicine: Medical Specialties</a> 
  <p>A relcat is used because surgery is a medical speciality. However, 
    medical specialities are not a subset of surgery; the relationship is the 
    other way around. I.e. medical specialities could <i>not</i> logically be 
    a sub-category of surgery, but they <i>are</i> related, thus a relcat link 
    is used. 
  <p> You will see that <a href="http://dmoz.org:8080/Health/Medicine/Medical_Specialties/">Health: 
    Medicine: Medical Specialties</a> contains an @link to <a href="http://dmoz.org:8080/Health/Medicine/Surgery/">Health/Medicine/Surgery</a>. 
    This is because the latter could logically be a sub-category of the former. 
  <p>Indeed, as a general rule, if an @link is used from categories 
    A to B, a relcat should be used from B to A. 
  
<p>Another use for relcats is to link to categories that are <i>related</i> and 
  in different languages but not equivalent. To link together categories that 
  are the <i>same</i> but in different languages, you use an <a href="/ddp/01002/">altlang</a>. 
  If, however, the relationship is not 1:1 a related category link should be used. 
  For further information on the importance of reciprocal altlangs see: <a href="/ddp/01002/#theory">Altlang 
  Theory - The Worldlinkerator and the Importance of Reciprocality</a>. 
<h3><a name="examples"></a>Further Examples</h3>
  
<ol>
  <li>Imagine that the following categories existed:<br>
    /Widgets/Companies/<br>
    /Companies/ 
    <p>It would make sense to create an @link in /Companies called 'Widgets' pointing 
      to /Widgets/Companies/ . The reason we would use an @link is that Widget 
      companies are a type of company, thus could logically exist as a subcategory 
      of /Companies.</p>
  </li>
  <li>Consider: <a href="http://dmoz.org:8080/Regional/Europe/United_Kingdom/Recreation_and_Sports/%20">Regional/Europe/United_Kingdom/Recreation_and_Sports/ 
    </a> 
    <p>As you can see it contains categories for specific sports, from a UK perspective. 
      For instance: <a href="http://dmoz.org:8080/Regional/Europe/United_Kingdom/Recreation_and_Sports/Mountain_Sports/">Regional/Europe/United_Kingdom/Recreation_and_Sports/Mountain_Sports</a> 
      and <a href="http://dmoz.org:8080/Regional/Europe/United_Kingdom/Recreation_and_Sports/Kites/">Regional/Europe/United_Kingdom/Recreation_and_Sports/Kites</a> 
    </p>
    <p>The category <a href="http://dmoz.org:8080/Recreation/Scouting/Regional/Europe/United_Kingdom/">Recreation/Scouting/Regional/Europe/United_Kingdom</a> 
      had already been created, elsewhere in the directory. It is a logical subset 
      of <a href="http://dmoz.org:8080/Regional/Europe/United_Kingdom/Recreation_and_Sports/">Regional/Europe/United_Kingdom/Recreation_and_Sports</a>, 
      thus an @link is provided to it.</p>
  </li>
  <li><a href="http://dmoz.org:8080/Society/Law/">Society/Law</a> contains the following 
    relcats: 
    <p><a href="http://dmoz.org:8080/Society/Crime/">Society: Crime</a> <br>
      <a href="http://dmoz.org:8080/Society/Government/">Society: Government</a><br>
      <a href="http://dmoz.org:8080/Society/Politics/">Society: Politics</a><br>
    </p>
    The categories are related, but they could not be sub-categories of <a href="http://dmoz.org:8080/Society/Law/">Society/Law</a>, 
    thus a relcat is used.</li>
</ol>
<h3><a name="seealso"></a>See also:</h3>
<ul>
  <li><a href="/ddp/01002/">Alternative Language Links</a> - Linking together categories 
    in different languages. </li>
</ul>

	
	
	