| A | B |
|---|
| data | Facts given from which other facts may be inferred |
| information | knowledge, intelligence, a particular piece of data with a special meaning or function |
| database | a set of data |
| data warehouse | composed of data from multiple sources placed into one logical database |
| synonyms | the same concept with a different name |
| homonyms | one word used for different concepts |
| life cycle | the functional steps of the entity |
| subtype | inherits all relationships of supertype |
| exhaustive | every instance of a supertype is also instance of one of the subtypes |
| mutually exclusive | every instance of a supertype is of one and only one subtype |
| relationships | express how entities are mutually related |
| physical data modeling | the structuring of the future database |
| conceptual data modeling | is structuring data concepts into logical, coherent and mutually related groups |
| information engineering | another name for conceptual data modeling |
| supertype | the --parent-- group to which the entities belong |
