Basic attributes:
(1) Identity class attribute: an attribute applicable to data element identification. Including Chinese name, English name, Chinese spelling, internal identifier, version, registration authority, synonymous name and context. ?
(2) Define class attributes: attributes that describe data meta-semantics. Includes definition, object words, characteristic words and application constraints.
Extended data:
A data element usually consists of three parts: object class, feature and representation:
(1) object class. It is a collection of things or abstract concepts in the real world, with clear boundaries and meanings, and its characteristics and behaviors can be identified by following the same rules. ?
(2) property. It is a certain attribute owned by all individuals of an object class, and it is the basis for distinguishing an object from other members.
(3) representativeness. It is a combination of range, data type and expression, and also includes information such as measurement unit and character set when necessary.
Such as personnel, facilities, equipment, organization, environment and materials. Characteristics are a means for people to distinguish and identify things, such as the name, gender, height, weight, position, model, caliber, height, length and effective range of tanks.
Baidu Encyclopedia-Data Element