diff --git a/xep-0166.xml b/xep-0166.xml
index 6029bb0c..ef07dc41 100644
--- a/xep-0166.xml
+++ b/xep-0166.xml
@@ -1256,7 +1256,7 @@ PENDING  o-----------------------+   |
       </tr>
       <tr>
         <td>senders</td>
-        <td>Which parties in the session will be generating content; the allowable values are "initiator", "none", "responder", and "both" (where the default is "both").</td>
+        <td>Which parties in the session will be generating content (i.e., the direction in which a Jingle session is active); the allowable values are "both", "initiator", "none", and "responder" (where the default is "both"). Note that the defined values of the 'senders' attribute in Jingle correspond to the SDP attributes of "sendrecv", "sendonly", "inactive", and "recvonly" defined in &rfc4566; and used in the offer-answer model &rfc3264;.</td>
         <td>OPTIONAL except when sending content-modify, in which case it is REQUIRED.</td>
       </tr>
     </table>