update description

Author: kschweikert

docs/index-en.html

@@ -78,7 +78,7 @@ <h2>Release: 2024-03-06</h2>
 <dt>Revision:</dt>
 <dd>1</dd>
 <dt>Issued on:</dt>
-<dd>Date issued</dd>
+<dd>2025-12-09</dd>
 <dt>Authors:</dt>
 <dd><a href="http://orcid.org/0000-0002-5331-5052">http://orcid.org/0000-0002-5331-5052</a></dd><dd><a href="https://orcid.org/0000-0003-3271-6700">https://orcid.org/0000-0003-3271-6700</a></dd>
 
@@ -102,7 +102,13 @@ <h2>Release: 2024-03-06</h2>
 <span>Ontology Specification Draft</span>
 </div>
 </div>     <div id="abstract"><h2>Abstract</h2><span class="markdown">
-This is a placeholder text for the abstract. The abstract should contain a couple of sentences summarizing the ontology and its purpose.</span>
+Facilities are specific locations where commercial or institutional activity occurs. Industry classification schemes
+divide economic activities into functional groups. These two key concepts are crucial for analyzing institutional
+and economic activity and its spatial distribution, which are critical for understanding environmental impact,
+labor dynamics, supply chains, and many other complex social and environmental phenomena. The Facilities and Industries Ontology (FIO) is a generic ontology design pattern for linking facilities
+to industry sectors as defined in classification systems. FIO supports semantic reasoning to, e.g., infer broader
+industry sectors that are associated with facilities and organizations. 
+</span>
 </div>
 <div id="toc"></div>