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-rw-r--r--doc/zmq_pgm.78
1 files changed, 5 insertions, 3 deletions
diff --git a/doc/zmq_pgm.7 b/doc/zmq_pgm.7
index 1559950..3c4c7d1 100644
--- a/doc/zmq_pgm.7
+++ b/doc/zmq_pgm.7
@@ -2,12 +2,12 @@
.\" Title: zmq_pgm
.\" Author: [see the "AUTHORS" section]
.\" Generator: DocBook XSL Stylesheets v1.75.2 <http://docbook.sf.net/>
-.\" Date: 03/30/2011
+.\" Date: 04/20/2011
.\" Manual: 0MQ Manual
-.\" Source: 0MQ 2.1.4
+.\" Source: 0MQ 2.1.5
.\" Language: English
.\"
-.TH "ZMQ_PGM" "7" "03/30/2011" "0MQ 2\&.1\&.4" "0MQ Manual"
+.TH "ZMQ_PGM" "7" "04/20/2011" "0MQ 2\&.1\&.5" "0MQ Manual"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
.\" -----------------------------------------------------------------
@@ -124,6 +124,8 @@ data = *OCTET
.sp
In order for late joining consumers to be able to identify message boundaries, each PGM datagram payload starts with a 16\-bit unsigned integer in network byte order specifying either the offset of the first message \fIframe\fR in the datagram or containing the value 0xFFFF if the datagram contains solely an intermediate part of a larger message\&.
.sp
+Note that offset specifies where the first message begins rather than the first message part\&. Thus, if there are trailing message parts at the beginning of the packet the offset ignores them and points to first initial message part in the packet\&.
+.sp
The following diagram illustrates the layout of a single PGM datagram payload:
.sp
.if n \{\