diff --git a/draft-ymbk-idr-l3nd.xml b/draft-ymbk-idr-l3nd.xml
index d79cc54..c173dfe 100644
--- a/draft-ymbk-idr-l3nd.xml
+++ b/draft-ymbk-idr-l3nd.xml
@@ -542,7 +542,7 @@ Flags (bit):
     respond with an ACK PDU.</t>
 
 <!--
-    protocol "Version = 0:8,PDU Type = 1:8,Payload Length:32,Nonce:32,AttrCount:8,Attribute List ...:40,Serial Number:32"
+    protocol "Version = 0:8,PDU Type = 1:8,Payload Length:32,Session ID:32,AttrCount:8,Attribute List ...:40,Serial Number:32"
 -->
 
       <figure>
@@ -550,13 +550,13 @@ Flags (bit):
  0                   1                   2                   3  
  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-|  Version = 0  |  PDU Type = 2 |         Payload Length        ~
+|  Version = 0  |  PDU Type = 1 |         Payload Length        |
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-~                               |             Nonce             ~
+|                               |           Session ID          |
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-~                               |   AttrCount   |               ~
+|                               |   AttrCount   |               |
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+               +
-~                       Attribute List ...                      ~
+|                       Attribute List ...                      |
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 |                         Serial Number                         |
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
@@ -564,13 +564,14 @@ Flags (bit):
       </figure>
 
     <t>The four octet Payload Length is the number of octets in all
-    fields of the PDU from the Nonce through the Serial Number.</t>
+    fields of the PDU from the Session ID through the Serial Number.</t>
 
-    <t>The four octet Nonce identifies a session.  It enables detection
-    of a duplicate OPEN PDU.  It SHOULD be either a random number or a
-    high resolution timestamp.  It is needed to prevent session closure
-    due to a repeated OPEN caused by a race or a dropped or delayed ACK.
-    It can be used to resume a dropped logical session.</t>
+    <t>The four octet Session ID uniquely identifies a session.  It
+    enables detection of a duplicate OPEN PDU.  It SHOULD be either a
+    random number or a high resolution timestamp.  It is needed to
+    prevent session closure due to a repeated OPEN caused by a race or a
+    dropped or delayed ACK.  It can be used to resume a dropped logical
+    session.</t>
 
     <t>The one octet AttrCount is the number of attributes in the
     Attribute List.  A node may send zero or more attributes.</t>
@@ -594,9 +595,9 @@ Flags (bit):
     the Serial Number would cause it to be zero, it should be
     incremented again.</t>
 
-    <t>On session restart (new OPEN, same Nonce), a receiver MAY send
-    the last received Serial Number to tell the sender to only send data
-    with a Serial Number greater (in the <xref target="RFC1982"/>
+    <t>On session restart (new OPEN, same Session ID), a receiver MAY
+    send the last received Serial Number to tell the sender to only send
+    data with a Serial Number greater (in the <xref target="RFC1982"/>
     sense), or send a Serial Number of zero to request all data.</t>
 
     <t>This allows a sender of an OPEN to tell the receiver that the