ISO 22745-2:2010(E)

15 Terms relating to metadata

15.1
datatype

set of distinct values, characterized by properties of those values, and by operations on those values

[ISO/IEC 11404:2007, definition 4.11]

15.2
data element

unit of data for which the definition, identification, representation, and permissible values are specified by means of a set of attributes.

[ISO/IEC 11179-1:2004, definition 3.3.8]

15.3
representation

specification of the pattern that members of of set of data must adhere to, including data type, constraints, combination, and logical expressions

EXAMPLE 1  The statement that the material for a bracket is either ALUMINUM ALLOY, MIL-R-12545, ALLOY 6061 or ALUMINUM ALLOY, QQ-A-601, CLASS 9, COND F (and nothing else) is an example of a logical expression.

EXAMPLE 2  The statement that a pump's housing material can be a combination of ALUMINUM ALLOY 6061 and CHROMIUM, QQ-C-320, TYPE 1, CLASS 2D is an example of the specification of a combination.

15.4
feature

preconceived form pattern that has some specific engineering meaning

NOTE   Properties can be assigned to features, independently of other features or of an item as a whole.

EXAMPLE   Examples of features for a bearing include:


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