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Glossary
Entity: A real world thing or object which is distinguishable from every other
objects.
Attributes: The features used to distinguish an entity.
Constraints: Some validity rules to which the contents of the database must
confirm.
Keys: Identification of attribute and relationships to distinguish entities and
relationships from each
Mapping Cardinalities: The number of entities to which another entity can be
associated through a relationship set.
Weak Entity sets: The entities may not have sufficient attributes to form a
primary key.
Owner entity set: The entity set associated by weak entity sets to be meaningful.
Specialization: Designing sub groups within an entity set.
Generalization: Relationship that exists between a higher-level entity set and one
or more lower-level entity sets.
Aggregation: An abstraction in which relationship sets along with their associated
entity sets are treated as higher-level entity sets, and can participate in
relationships.
Data mining: The techniques for discovering patterns in collections of data.
Data Ware house: Static data collections to do data mining.
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