January 2004
Intermediate to advanced
483 pages
13h 35m
English
Content preview from How to Build a Business Rules Engine
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in which the usage of columns in rules could be determined were discussed. These
approaches should be used here to provide a report showing how user-defined
columns are used in rules. The primary reason for users to define columns is to be
able to implement additional rules, and so it is important to know how the columns
are being used.
Subtype Reports
Subtypes are very important in ensuring that certain rules affect only subsets of
records within database tables. Since they are primary drivers for business rules they
need to be monitored carefully.
Subtypes without Rules to Identify Them
Every subtype in a given database table is recognized by a certain value in a certain
column in that table. The column is known as the Subtype Discriminator Column,
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