An entity-relationship diagram (E-R) is useful because it shows the various entities being modeled and the important relationships among them. Anything about which the organization wants to collect and store information is called
b. an entity.
c. a schema.
d. a tuple.
e. none of above
The __________ in the REA model include all of the organization's business activities. a. resources
How many types of relationships are possible between entities? a. one
e. an odd number
The primary key for many-to-many tables consists of
single attribute unique for that relationship.
primary keys from each entity linked in the relationship.
c. a series of foreign keys.
d. a linked primary key and a foreign key from both entities. e. a and b only
Using the REA data model, promises to engage in future economic exchanges are called a. commitments
and c only
Economic exchange event is "linked" with other economic exchange event in what can be described as
b. resource-event relationships.
economic duality relationship.
e. all of these
The __________ of a relationship in an REA diagram expresses the occurrences of one entity that may be associated with a single occurrence of the other entity. a. schema
An integrated REA diagram shows events that
c. increase and decrease resources.
d. none of these
e. a and b only
REA diagrams are especially useful
the documentation of...
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