Definition
In the simplest terms, a Data Type is the constraint on a data element. It defines the type of data held within the data element. For example, the data element Date of birth is associated with the data type xs:date, which only allows for the input of data in the YYYY-MM-DD format.
The definitions, including rules and constraints for valid values for all Data Types are defined using the following metamodel:
Name: the name of the data type
Description: a description of the data type
...
(if applicable/available)
Type
Simple - e.g. varchar, string, integer
Enumerated - a list of possible values
Reference - reference to another data type/element
Relationships: to other data types or data element (if applicable)
Examples
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