C++ Neural Networks and Fuzzy Logic: Preface

cov—country visited

lov—length of visit (days)

nov—number of visits including previous visits

ctz—citizenship

yov—year of visit

lps—language (other than mother tongue) with proficiency to speak

lpu—language with only proficiency to understand

hs—history was studied (1—yes, 0—no)

Typical entries may appear as noted in Table 16.1.

Table 16.1 Example Database

Nameagectzcovlovnovyovlpslpuhs

John Smith35U.S.India411994Hindi1

John Smith35U.S.Italy721991Italian1

John Smith35U.S.Japan3119930

When a query is made to list persons that visited India or Japan after 1992 for 3 or more days, John Smith’s

two entries will be included. The conditions stated for this query are straightforward, with lov [ge] 3 and yov

> 1992 and (cov = India or cov = Japan).