The DEAT Business Rule Pattern Language

Russell R. Hurlbut, Ph.D.

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Patterns Comments
Range Set e.g. age between 21 and 65
Interval Increment-by, rounding
Domain Enumeration types, min/max
Type membership Include conversion between types
Default Value initial value if null
Multiplicity Mandatory, limits, and cardinality
Ordering key function definition
Uniqueness relates to values, not object identity
Recursion e.g. composite pattern
Aggregation e.g. frequency distribution of values
Sub-typing includes disjunction and overlapping
Association and, or, if exists, for all
Temporal Association   relates creation to others’ existence
Entity State History functional versioning of attribute
Temporal Aggregation   rates, counts
Unit Of Work   atomic transaction definition
State Transitions progressive, reinitiating, cycle, etc
Triggers when needed, when changed
Event Management mutual dependencies, synchronized
Deferred Action queuing, blocking, etc.
Priority conflict resolution
Schedule Execution absolute, relative executions
Role role, organization structure mapping
Authorization creation, override, execution rights
Contingency timed window for execution
Enforcement prevent, notify, log, permit
Self-Modification reconfigure, recompile components
Algorithm mathematical calculations
Inferred Fact inferencing, induction, deduction
Type Conversion Interface
Type Migration schema evolution
Interpolation specialized algorithm
Contract arguments, types, order
Alternatives alternative, extension actions
Exceptions conditions for exception actions
Explanation Operation, rule invocations

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