small update to katapi doc

Author: paulhectork

APP/templates/pages/KatAPI.html

@@ -5,8 +5,15 @@
 <div class="container">
 <h1>KatAPI</h1>
 
-<p>KatAPI is an API that allows the automated retrieval of data from the project
-    in <code>json</code> or <code>xml-tei</code>.</p>
+<p>
+  KatAPI is an API that allows the automated retrieval of data from the project
+  in <code>json</code> or <code>xml-tei</code>. It functions as a complete search
+  engine that parses the user's query parameters, retrieves the proper data from
+  the project's databases and sends it back to the user. The API allows, for example,
+  to retrieve the description of all manuscripts of the Marquise de Sévigné written
+  between 1650 and 1690 and sold between 1880 and 1900 in a complete and valid TEI
+  format.
+</p>
 
 <hr/>
 
@@ -265,4 +272,4 @@ <h2>Examples</h2>
 </ul>
 
 </div>
-{% endblock %}
+{% endblock %}