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Difference between revisions of "Data Range"
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− | == | + | {{#eclipseproject:technology.higgins}} |
− | This | + | [[Image:Higgins_logo_76Wx100H.jpg|right]] |
+ | == Version == | ||
+ | This pages describes the concept of [[Data Range]] used in [[Context Data Model 1.1]]. | ||
== Definition == | == Definition == | ||
− | * | + | * A [[Data Range]] defines the range of values of an [[Attribute]] |
− | * | + | * A [[Data Range]] MUST have a base XML Schema type (e.g. String) |
− | * | + | * A [[Data Range]] MAY include a set of constraining "facets" on its value(s). The names and semantics of these facets are taken from the [http://www.w3.org/TR/xmlschema-2/#rf-facets Constraining Facets] section of XML Schema Part 2. They include: |
− | ** | + | ** Enumeration (e.g., must be one of {"red", "green", "blue"}) |
− | ** | + | ** Pattern (e.g. regular expression) |
− | ** | + | ** Bounding (e.g. less than 5, more than 100) |
− | + | See the [http://www.w3.org/TR/xmlschema-2/#rf-facets Constraining Facets] section of XML Schema Part 2 for detailed specifications and examples. | |
== Examples == | == Examples == | ||
− | * An [[Attribute]] might have a value whose [[Data Range]] was defined in the [[Context]] | + | * An [[Attribute]] might have a value whose [[Data Range]] was defined in the schema of its [[Context]] as "telephone number". This telephone number [[Data Range]] might have a base type of [http://www.w3.org/TR/xmlschema-2/#string string] as defined by XML Schema Part 2, but for use in auto-dialing, it might also have a [http://www.w3.org/TR/xmlschema-2/#rf-pattern pattern] facet that constrains the syntax to be valid phone number in North American (e.g. it is of the form (NNN)-NNN-NNNN). |
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− | + | [[Category:Context Data Model 1.1]] | |
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Latest revision as of 00:04, 10 November 2010
{{#eclipseproject:technology.higgins}}
Version
This pages describes the concept of Data Range used in Context Data Model 1.1.
Definition
- A Data Range defines the range of values of an Attribute
- A Data Range MUST have a base XML Schema type (e.g. String)
- A Data Range MAY include a set of constraining "facets" on its value(s). The names and semantics of these facets are taken from the Constraining Facets section of XML Schema Part 2. They include:
- Enumeration (e.g., must be one of {"red", "green", "blue"})
- Pattern (e.g. regular expression)
- Bounding (e.g. less than 5, more than 100)
See the Constraining Facets section of XML Schema Part 2 for detailed specifications and examples.
Examples
- An Attribute might have a value whose Data Range was defined in the schema of its Context as "telephone number". This telephone number Data Range might have a base type of string as defined by XML Schema Part 2, but for use in auto-dialing, it might also have a pattern facet that constrains the syntax to be valid phone number in North American (e.g. it is of the form (NNN)-NNN-NNNN).