EXAMPLE 2.5 In Section 2.1.1, we noted that there can be many relations on a given set, and we mentioned several for the attribute height. The representa- tion condition has implications for each of these relations. Consider these examples: For the (binary) empirical relation taller than, we can have the numerical relation x> y Then, the representation condition requires that for A taller than B if and only if M(A) > M(B) For the (unary) empirical relation is-tall, we might have the numerical relation 36 Software Metrics any measure M, X>70 The representation condition requires that for any measure M, A is-tall if and only if M(A) > 70 For the (binary) empirical relation much taller than, we might have the numerical relation x>y+15 The representation condition requires that for any measure M, A much taller than B if and only if M(A) > M(B) + 15 For the (ternary) empirical relation x higher than y if sitting on z's shoulders, we could have the numerical relation 0.7x + 0.8z>y The representation condition requires that for any measure M,
EXAMPLE 2.5 In Section 2.1.1, we noted that there can be many relations on a given set, and we mentioned several for the attribute height. The representa- tion condition has implications for each of these relations. Consider these examples: For the (binary) empirical relation taller than, we can have the numerical relation x> y Then, the representation condition requires that for A taller than B if and only if M(A) > M(B) For the (unary) empirical relation is-tall, we might have the numerical relation 36 Software Metrics any measure M, X>70 The representation condition requires that for any measure M, A is-tall if and only if M(A) > 70 For the (binary) empirical relation much taller than, we might have the numerical relation x>y+15 The representation condition requires that for any measure M, A much taller than B if and only if M(A) > M(B) + 15 For the (ternary) empirical relation x higher than y if sitting on z's shoulders, we could have the numerical relation 0.7x + 0.8z>y The representation condition requires that for any measure M,
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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For the empirical and numerical relation system of Example 2.5, write a numerical assignment satisfy the representation condition
example 2.5 in text2_Fenton, Norman - Software Metrics_ A Rigorous and Practical Approach, Third Edition (2014, CRC Press).pdf
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