The Perseus release number is of the form "primary.major.minor.version" where:

primary

Incremented when going to a new level of release (such as beta to production) or after major re-engineering.

major

A change in the major number indicates changes that affect the SQL definition files or client setup of the connection factory. Generated SQL classes should be rebuilt.

minor

A change in the minor number indicates internal changes requiring that generated SQL files should be re-created.

version

A change in the version number indicates changes that do not require changes to the major or minor numbers.