January 2004
Intermediate to advanced
483 pages
13h 35m
English
Content preview from How to Build a Business Rules Engine
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The previous chapter dealt with the Required Screen Fields rule type, which enables
users to specify screen fields for which data must be entered. There are a number of
other rule types that are needed to completely validate screen inputs, and in this
chapter, two of these additional rule types will be considered:
䊏
Valid Datatypes for Screen Fields
䊏
Screen Fields Valid Ranges
The first rule type is similar in complexity to the Required Screen Fields rule
type considered in the previous chapter. However, the second rule type is somewhat
more complex than the Required Screen. In particular, it requires the business rules
engine to deal with business rule components and business rule versions. In order to
do this, it is necessary to extend the Business ...
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