Reads in full:

"The <db:auto-increment> element is a container for information related to dealing with auto-increment values and table columns."

The two attributes of this element are: db:additional-column-statement (19.33) and db:row-retrieving-statement (19.77)

19.33 - says - The db:additional-column-statement attribute specifies a statement, which is placed after the column part of a "CREATE TABLE" SQL-statement, for a column whose value should be automatically incremented by the database engine upon data insertion.

19.77 - says - The db:row-retrieving-statement attribute specifies an SQL statement, which is executed to retrieve auto generated values after inserting a new row.

No sure how this fits the description. (there are other issues on 19.33 but I will post those separately)