Time and Time Again: Managing Time in Relational Databases, Part 8: Version Pattern 5 – DMReview:
Version Pattern 5 is the first pattern to manage objects with multiple episodes, a concept introduced in Part 4. To avoid taking on too much at once, however, Pattern 5 will not include bi-temporality. That will come with Pattern 6 which will be, consequently, a pattern supporting both multiple episode objects and bi-temporality.