2.1.805 Part 1 Section 18.11.1.2, headers (Revision Headers)

a.   The standard does not specify a default value for the lastGuid attribute.

Excel uses the value of the guid attribute as the default value of the lastGuid attribute.

b.   The standard does not place any restrictions on the value for @preserveHistory.

Office requires that the value of @preserveHistory shall be greater than or equal to 0 and less than or equal to 32K.

c.   The standard specifies @protected is false if the tracking should not be removed, true otherwise.

Office specifies @protected is true if the tracking should not be removed, false if it can be removed.

d.   The standard does not place any restrictions on the value for @revisionId.

Office allows a maximum value of 2147483647.

e.   The standard does not place any restrictions on the value for the version attribute.

Office requires that the version attribute be between 1 and 2147483647 inclusive.

f.   The standard specifies @guid to be of type ST_Guid.

Office requires @guid to not be a null Guid ({00000000-0000-0000-0000-000000000000}).