From Chet:

This could be a new section (0.4 Revision History) in Part 0: Overview chapter. Just a high-level history is sufficient. For example, a table with columns (Revision number, Revision date, Description of changes) and four rows each one corresponding to Working Draft 1 through 4. For example, the first row

{ Working Draft 1, <date>, <list of issues addressed> }

. The revision history is useful for reviewers who have not been a part of the specification development and is particularly useful during public review.