August 2014
Advanced
560 pages
15h 32m
English
Although the concept of packing and unpacking relations is essentially straightforward (at least when the operation is performed on the basis of just a single interval attribute), it turns out that the concept has a variety of implications and ramifications—not all of which are immediately obvious—when the operation is performed on the basis of N such attributes when N is not equal to 1. This chapter investigates such matters in depth. In particular, it shows how those investigations lead to an important concept of equivalence among relations and to a novel concept of redundancy in relations with interval attributes.
UNPACK; PACK; unpacked form; packed form; equivalence ...