*** pgsql/doc/src/sgml/protocol.sgml	2010/01/15 09:18:59	1.77
--- pgsql/doc/src/sgml/protocol.sgml	2010/02/03 09:47:19	1.78
***************
*** 1,4 ****
! <!-- $PostgreSQL: pgsql/doc/src/sgml/protocol.sgml,v 1.76 2009/12/02 04:54:10 tgl Exp $ -->
  
  <chapter id="protocol">
   <title>Frontend/Backend Protocol</title>
--- 1,4 ----
! <!-- $PostgreSQL: pgsql/doc/src/sgml/protocol.sgml,v 1.77 2010/01/15 09:18:59 heikki Exp $ -->
  
  <chapter id="protocol">
   <title>Frontend/Backend Protocol</title>
*************** The commands accepted in walsender mode
*** 4179,4190 ****
        already been recycled. On success, server responds with a
        CopyOutResponse message, and backend starts to stream WAL as CopyData
        messages.
       </para>
  
       <para>
!       The payload in each CopyData message consists of an XLogRecPtr,
!       indicating the starting point of the WAL in the message, immediately
!       followed by the WAL data itself.
       </para>
       <para>
         A single WAL record is never split across two CopyData messages. When
--- 4179,4243 ----
        already been recycled. On success, server responds with a
        CopyOutResponse message, and backend starts to stream WAL as CopyData
        messages.
+       The payload in CopyData message consists of the following format.
       </para>
  
       <para>
!       <variablelist>
!       <varlistentry>
!       <term>
!           XLogData (B)
!       </term>
!       <listitem>
!       <para>
!       <variablelist>
!       <varlistentry>
!       <term>
!           Byte1('w')
!       </term>
!       <listitem>
!       <para>
!           Identifies the message as WAL data.
!       </para>
!       </listitem>
!       </varlistentry>
!       <varlistentry>
!       <term>
!           Int32
!       </term>
!       <listitem>
!       <para>
!           The log file number of the LSN, indicating the starting point of
!           the WAL in the message.
!       </para>
!       </listitem>
!       </varlistentry>
!       <varlistentry>
!       <term>
!           Int32
!       </term>
!       <listitem>
!       <para>
!           The byte offset of the LSN, indicating the starting point of
!           the WAL in the message.
!       </para>
!       </listitem>
!       </varlistentry>
!       <varlistentry>
!       <term>
!           Byte<replaceable>n</replaceable>
!       </term>
!       <listitem>
!       <para>
!           Data that forms part of WAL data stream.
!       </para>
!       </listitem>
!       </varlistentry>
!       </variablelist>
!       </para>
!       </listitem>
!       </varlistentry>
!       </variablelist>
       </para>
       <para>
         A single WAL record is never split across two CopyData messages. When