--- a/schema.org/ext/tvradio.html	Tue Dec 11 14:04:53 2012 +0000
+++ b/schema.org/ext/tvradio.html	Wed Dec 12 11:02:46 2012 +0000
@@ -49,13 +49,13 @@
 
     <div typeof="rdfs:Class" resource="http://schema.org/TVSeason">
       <span class="h" property="rdfs:label">TV season</span>
-      <span property="rdfs:comment">A TV season.</span>
+      <span property="rdfs:comment">Season dedicated to TV broadcast and associated on line delivery.</span>
       <span>Subclass of: <a property="rdfs:subClassOf" href="http://schema.org/Season">Season</a></span>
     </div>
 
     <div typeof="rdfs:Class" resource="http://schema.org/TVSeries">
       <span class="h" property="rdfs:label">TV series</span>
-      <span property="rdfs:comment">A TV series.</span>
+      <span property="rdfs:comment">Series dedicated to TV broadcast and associated on line delivery.</span>
       <span>Subclass of: <a property="rdfs:subClassOf" href="http://schema.org/Series">Series</a></span>
     </div>
 
@@ -67,13 +67,13 @@
 
     <div typeof="rdfs:Class" resource="http://schema.org/RadioSeason">
       <span class="h" property="rdfs:label">Radio season</span>
-      <span property="rdfs:comment">A radio season.</span>
+      <span property="rdfs:comment">Season dedicated to radio broadcast and associated on line delivery.</span>
       <span>Subclass of: <a property="rdfs:subClassOf" href="http://schema.org/Season">Season</a></span>
     </div>
 
     <div typeof="rdfs:Class" resource="http://schema.org/RadioSeries">
       <span class="h" property="rdfs:label">Radio series</span>
-      <span property="rdfs:comment">A radio series.</span>
+      <span property="rdfs:comment">Series dedicated to radio broadcast and associated on line delivery.</span>
       <span>Subclass of: <a property="rdfs:subClassOf" href="http://schema.org/Series">Series</a></span>
     </div>
 
@@ -84,11 +84,30 @@
 
     <div typeof="rdf:Property" resource="http://schema.org/episodeNumber">
       <span class="h" property="rdfs:label">episode number</span>
-      <span property="rdfs:comment">The episode number.</span>
+      <!-- More precise description of the property -->
+      <span property="rdfs:comment">Position of the episode within an ordered group of episodes.</span>
       <span>Domain: <a property="http://schema.org/domain" href="http://schema.org/Episode">Episode</a></span>
       <span>Range: <a property="http://schema.org/range" href="http://schema.org/Integer">Number</a></span>
     </div>
 
+    <div typeof="rdf:Property" resource="http://schema.org/startDate">
+      <span class="h" property="rdfs:label">start date</span>
+      <!-- More precise description of the property -->
+      <span property="rdfs:comment">First original publication of an episode within that series or season</span>
+      <span>Domain: <a property="http://schema.org/domain" href="http://schema.org/Series">Series</a></span>
+      <span>Domain: <a property="http://schema.org/domain" href="http://schema.org/Season">Season</a></span>
+      <span>Range: <a property="http://schema.org/range" href="http://schema.org/Date">Date</a></span>
+    </div>
+
+    <div typeof="rdf:Property" resource="http://schema.org/endDate">
+      <span class="h" property="rdfs:label">end date</span>
+      <!-- More precise description of the property -->
+      <span property="rdfs:comment">Last original publication of an episode within that series or season</span>
+      <span>Domain: <a property="http://schema.org/domain" href="http://schema.org/Series">Series</a></span>
+      <span>Domain: <a property="http://schema.org/domain" href="http://schema.org/Season">Season</a></span>
+      <span>Range: <a property="http://schema.org/range" href="http://schema.org/Date">Date</a></span>
+    </div>
+
     <div typeof="rdf:Property" resource="http://scheam.org/partOfSeason">
       <span class="h" property="rdfs:label">part of season</span>
       <span property="rdfs:comment">The season to which this episode belongs.</span>
@@ -98,7 +117,7 @@
 
     <!-- New properties on episode, series and seasons -->
 
-    <div typeof="rdf:Property" resource="http://scheam.org/partOfSeries">
+    <div typeof="rdf:Property" resource="http://schema.org/partOfSeries">
       <span class="h" property="rdfs:label">part of series</span>
       <span property="rdfs:comment">The season to which this episode or season belongs.</span>
       <span>Domain: <a property="http://schema.org/domain" href="http://schema.org/Episode">Episode</a></span>
@@ -106,5 +125,20 @@
       <span>Range: <a property="http://schema.org/range" href="http://schema.org/Series">Series</a></span>
     </div>
 
+    <div typeof="rdf:Property" resource="http://schema.org/seasonNumber">
+      <span class="h" property="rdfs:label">season number</span>
+      <span property="rdfs:comment">Position of the season within an ordered group of seasons.</span>
+      <span>Domain: <a property="http://schema.org/domain" href="http://schema.org/Season">Season</a></span>
+      <span>Range: <a property="http://schema.org/range" href="http://schema.org/Integer">Number</a></span>
+    </div>
+
+    <div typeof="rdf:Property" resource="http://schema.org/position">
+      <span class="h" property="rdfs:label">position</span>
+      <span property="rdfs:comment">Free text to define other than pure numerical ranking of an episode or a season in an ordered list of items (further formatting restrictions may apply within particular user groups).</span>
+      <span>Domain: <a property="http://schema.org/domain" href="http://schema.org/Episode">Episode</a></span>
+      <span>Domain: <a property="http://schema.org/domain" href="http://schema.org/Season">Season</a></span>
+      <span>Range: <a property="http://schema.org/range" href="http://schema.org/Text">Text</a></span>
+    </div>
+
   </body>
 </html>