Data Elements Old

Data Elements

A data model contains a structured collection of data elements.   The structure may be a simple list; it is more likely to be a structure in which data elements are organised into sections or classes.

An individual data element describes a data point that may take a range of different values: e.g., a question on a form, a column in a spreadsheet, or a field in a database. 

The range of values allowed for a particular data element is called its value domain.  Some value domains may be numeric, with specific units.   Some may be enumerated: a list of terms or values, each with a specific interpretation.