RFC 4880, "OpenPGP Message Format", November 2007

Note: This RFC has been updated by RFC 5581

Errata ID: 2236
Status: Held for Document Update
Type: Editorial
Publication Format(s) : TEXT
Reported By: Constantin Hagemeier
Date Reported: 2010-04-28
Held for Document Update by: Sean Turner

Section 11. says:

11.  Packet Composition

(the headline)

It should say:

11.  Packet Sequence Composition

Notes:

It is about the composition of a sequence of packets, not about the
composition of a packet.

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