TADESSE TAREKE.pdf - Addis Ababa University

Development of BROOM Business Rules Object-Oriented Method
The question is then, how can we model facts/relationships of a business rules
system in an object-oriented way using UML? Facts (Layer 2) in a business rules
system (Layer 1) can be modeled by considering its component (Layer 3) - List of
Facts/Relationships of a system along with the characteristics or properties of this
component –Entity1, Attribute1, Entity2, and Attribute2. This handles containment
of attributes by an entity as well as the relationships between two tables.
FACTS DATA MODEL (FDM)
Facts can be modeled as Relationships [22, 49] of the Entities and Attributes that
are modeled for the terms. Thus, to model the facts of a business rule, we need to
model its components shown in Figure 7 above. Table 5 below presents the data
model for the collection of facts in business rules system.
Table 5: List of Facts Data Model Design
No. Field Remark
1. FactID This is a Primary Key.
2. Entity1 The first entity where a relation starts.
3. Attribute1 For Related To: A key of the Entity1 by which it is related to the
Entity2 with a key of Attribute2.
For Containment: This may also represent that Attribute1 is
contained in Entity1. In that case, both Entity2 and Attribute2 are
empty string.
4. Entity2 A second entity which is related to the Entity1.
5. Attribute2 Similar to 3 above.
6. IsUnique For containment relationship, an attribute (attribute1) of Entity1
may be unique or repeating. If IsUnique is True, Attribute1 is
unique in Entity1.
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