In an email message to the Digital-Copyright discussion list, Peter Hirtle said:
The biggest change is that, at the request of a user, two new sections have been added. The first is on published and unpublished sound recordings, and the second is on architectural works. Other small changes have been made to clarify some of the problems other readers have identified. In order to facilitate printing, a PDF version of the file is available as well.The URL for this page is the same as before, so you do not have to update your links. However, if you have a printed a copy, you'll need to replace it with this updated version.
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