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Data Range
Introduction
This page describes the concept of an Attribute Value Datatype.
Definition
- The datatype of a value of an Attribute
- An Attribute Value Datatype MAY specialize:
- a base XML Schema type (e.g. String) for literal Attribute Value Datatypes
- OR a complex Attribute Value Datatype
- OR another Attribute Value Datatype
- An Attribute Value Datatypedefines a set of constraints on its value(s) including:
- Value must be one of {"red", "green", "blue"}
- Syntax constraints (e.g. regular expression)
- ranges (e.g. less than 5, more than 100)
- matching rules
Examples
- An Attribute might have a value whose Attribute Value Datatype was (XML Schema) string
- An Attribute might have a value whose Attribute Value Datatype was defined in the Contexts schema as "telephone number". This telephone number type might have a base type of (XML Schema) string, but might also have an XML Schema pattern restriction that constrained its syntax to be value in North America for auto-dialing (e.g. it is of the form (NNN)-NNN-NNNN)