... such as those discussed earlier in the chapter don't occur with this relvar. Exercise: Check this claim." Answer: It's easy to see that Copyright (c) 2003 C. J. Date page 11 .5 ... answer provided. Candidate keys: L, DPC, and DPT. 11 .14 Abbreviating NAME, STREET, CITY, STATE, and ZIP* to N, R, C, T, and Z, respectively, we have: N → RCT RCT → Z Z → CT An obviously ... don't need to be exhaustively discussed). 11 .2 Basic Definitions / 11 .3 Trivial and Nontrivial FDs / 11 .4 Closure of a Set of FDs / 11 .5 Closure of a Set of Attributes / 11 .6 Irreducible Sets...