Extend C172P meta-data.

Experimenting with extended meta-data required for aircraft catalogs. Not finalised yet, still evolving.

Aircraft/c172p/c172p-set.xml

@@ -12,6 +12,24 @@ Started October 23 2001 by John Check, fgpanels@rockfish.net
  <sim>
 
   <description>Cessna 172P Skyhawk (1981 model)</description>
+  <long-description>The Cessna 172 Skyhawk is a four-seat, single-engine, high-wing fixed-wing aircraft. 
+      First flown in 1955 and still in production, more Cessna 172s have been built than any other aircraft.
+  </long-description>
+  
+  <fr>
+      <long-description>Le Cessna 172 Skyhawk est un avion quadriplace, monomoteur à aile haute. 
+        Il effectua son premier vol en 1955 et est toujours en production, plus de Cessna 172 ont été construits que tout autres avions.
+        </long-description>
+  </fr>
+  
+  <tags>
+      <tag>ga</tag>
+      <tag>cessna</tag>
+      <tag>piston</tag>
+      <tag>single-engined</tag>
+      <tag>fixed-gear</tag>
+  </tags>
+  
   <author>David Megginson</author>
   <status>early production</status>
   <rating>