2003”N 3ŒŽ 1“ú SUBSETS: HOMETYPE VS. HETEROTYPIC BACK >> –ÚŽŸ



œ "Subsets of same type" and "subsets of different types"

1. We have data of "employee" with the identifier of "emp-NO", "employee" is an entity, and it's described as noted below:

@@employee:oemp-NO, emp-name,...p[ R ]

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2. If and when there is, in the "employee" set, a "partition" code of "classification by recruitment and job descriptions" with the value of "1" for "regular staff" and "2" for "part-timer", then the entity must be divided into two subsets as noted below:

[ example-1 ]

@employee:oemp-NO, emp-name, by rct...p[ R ]
@@b
@@~ by recuitment and job describtions
@@b
@@bQQQQ regular staff
@@b
@@bQQQQ part-timer

@
@Remember the example of business office subsets described previous time, as below:

[ example-2 ]

@Business Office:oBO-NO, BO-name, by location,...p[ R ]
@@b
@@ by location
@@b
@@bQQQQ domestic
@@b
@@bQQQQ subsidiary abroad

@Pay attention to the symbol "~" for the "partition" code: in the example-2, the symbol is designated as "" while in the example-1 it's as "~."
@"" shows that the same format or layout (style-sheet) should be applied to the subsets--the subsets are "homotype" (or "typical"), and they are named "isomorphic" subsets("regular shape", or subsets of the same format).
@"~" clarifies that there should be a difference in format (or style-sheet) among the subsets--the subsets are "heterotypic" (or "atypical"), and they are named "anomaly" subsets ("irregular shape", or subsets of different formats).

@

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