Difference between revisions of "Data Range"
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* An [[Attribute]] might have a value whose [[Data Range]] was defined in the [[Context]]s schema as "telephone number". This telephone number [[Data Range]] might have a base type of (XML Schema) string, but might also have an XML Schema ''pattern'' facet that constrained its syntax to be value in North America for auto-dialing (e.g. it is of the form (NNN)-NNN-NNNN) | * An [[Attribute]] might have a value whose [[Data Range]] was defined in the [[Context]]s schema as "telephone number". This telephone number [[Data Range]] might have a base type of (XML Schema) string, but might also have an XML Schema ''pattern'' facet that constrained its syntax to be value in North America for auto-dialing (e.g. it is of the form (NNN)-NNN-NNNN) | ||
| − | == Predefined [[ | + | == Predefined [[Data Ranges]]s == |
The following are predefined in HOWL: | The following are predefined in HOWL: | ||
# [[ContextIdDatatype]] | # [[ContextIdDatatype]] | ||
Revision as of 17:23, 12 February 2008
Introduction
This page describes the concept of an Data Range.
Definition
- The datatype and [optionally] constraints on the value of an Attribute
- An Data Range MUST have a base XML Schema type (e.g. String)
- An Data Range MAY include a set of constraint "facets" on its value(s). The names and semantics of these facets are taken from XML Schema. They include:
- Value must be one of {"red", "green", "blue"}
- Syntax constraints (e.g. regular expression)
- ranges (e.g. less than 5, more than 100)
<to be completed>
Examples
- An Attribute might have a value whose Data Range was defined in the Contexts schema as "telephone number". This telephone number Data Range might have a base type of (XML Schema) string, but might also have an XML Schema pattern facet that constrained its syntax to be value in North America for auto-dialing (e.g. it is of the form (NNN)-NNN-NNNN)
Predefined Data Rangess
The following are predefined in HOWL: