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Introduction
A Data Type is the constraint on a column or a simple type in an xsd or a set of enumerations in a form etc.
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There are a number of different types:
Primitives
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These include types such as an integer, long, string, varchar etc.
- They can include additional validation such as a regular expression or custom java / groovy code
- They do not have a measurement unit
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4) Other data types that use this as a base i.e. a data type such as Age
Simple
Simple types are derived from primitive types but they usually have additional
- condtrained range.
- upper and lower range (normal range)
- Can have a unit of measure.
- Can have a regular expression as a constraint.
- Or a complex rule constraint i.e. checksum written in groovy or java
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3) Age is measured in years i.e. it uses the Year measurement unit
Enumerated
Enumerated types are ordered collections of individuals or codes
i.e. M:Male, F:Female, U:Unknown
For Example:
Note:
1) Enumerations codes and descriptions
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