Data Requirements
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![http://semwebquality.org/ontologies/dq-constraints# DQ-Constraint Lib] for [http://spinrdf.org SPIN] | ![http://semwebquality.org/ontologies/dq-constraints# DQ-Constraint Lib] for [http://spinrdf.org SPIN] | ||
|- | |- | ||
| − | |Mandatory Property and Literal Rules | + | |'''Mandatory Property and Literal Rules''' |
|Properties and their literals become | |Properties and their literals become | ||
mandatory, if the data is required for the | mandatory, if the data is required for the | ||
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[[dqc:FunctionalDependentEmptyValueAll]] | [[dqc:FunctionalDependentEmptyValueAll]] | ||
|- | |- | ||
| − | |Syntactic Rules | + | |'''Syntactic Rules ''' |
|Syntactic rules define the type of | |Syntactic rules define the type of | ||
characters and/or the pattern of literal | characters and/or the pattern of literal | ||
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|[[dqc:SyntaxConstraints]] | |[[dqc:SyntaxConstraints]] | ||
|- | |- | ||
| − | |Functional Dependency Rules | + | |'''Functional Dependency Rules''' |
|Functional dependencies are | |Functional dependencies are | ||
dependencies between the values of two | dependencies between the values of two | ||
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|[[dqc:FunctionalDependencyConstraints]] | |[[dqc:FunctionalDependencyConstraints]] | ||
|- | |- | ||
| − | |Legal Value Rules | + | |'''Legal Value Rules''' |
|Legal value rules are the explicit | |Legal value rules are the explicit | ||
definition of the allowed values for a | definition of the allowed values for a | ||
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|[[dqc:LegalValueConstraints]] | |[[dqc:LegalValueConstraints]] | ||
|- | |- | ||
| − | |Legal Value Range Rules | + | |'''Legal Value Range Rules''' |
|Legal value range rules are the explicit | |Legal value range rules are the explicit | ||
definition of the allowed value range for | definition of the allowed value range for | ||
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|[[dqc:ValueRangeConstraints]] | |[[dqc:ValueRangeConstraints]] | ||
|- | |- | ||
| − | |Illegal Value Rules | + | |'''Illegal Value Rules''' |
|Illegal value rules are the explicit | |Illegal value rules are the explicit | ||
definition of the values that may not be | definition of the values that may not be | ||
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|[[dqc:LegalValueConstraints]] | |[[dqc:LegalValueConstraints]] | ||
|- | |- | ||
| − | |Illegal Value Range Rules | + | |'''Illegal Value Range Rules''' |
|Illegal value range rules are the explicit | |Illegal value range rules are the explicit | ||
definition of prohibited value ranges for | definition of prohibited value ranges for | ||
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|[[dqc:ValueRangeConstraints]] | |[[dqc:ValueRangeConstraints]] | ||
|- | |- | ||
| − | |Unique Value Rules | + | |'''Unique Value Rules''' |
|Unique value rules define properties that | |Unique value rules define properties that | ||
may contain each literal value not more | may contain each literal value not more | ||
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|[[dqc:UniquenessConstraints]] | |[[dqc:UniquenessConstraints]] | ||
|- | |- | ||
| − | |Outdated Value Rules | + | |'''Outdated Value Rules''' |
|Outdated value rules are rules that | |Outdated value rules are rules that | ||
identify instances that represent an | identify instances that represent an | ||
Revision as of 19:05, 9 August 2011
| Data Quality Rule | Definition | Example | DQ-Constraint Lib for SPIN |
|---|---|---|---|
| Mandatory Property and Literal Rules | Properties and their literals become
mandatory, if the data is required for the task at hand. |
The properties indicating the
geographical coordinates must exist and have values for all instances of the class foo:Location to be able to navigate to each location. |
dqc:MissingElementConstraints |
| Syntactic Rules | Syntactic rules define the type of
characters and/or the pattern of literal values. |
Literal values for the property
foo:country-name must only contain letters. |
dqc:SyntaxConstraints |
| Functional Dependency Rules | Functional dependencies are
dependencies between the values of two or more different properties. |
The literal value for foo:city is
always dependent to the literal value for foo:country, since certain city names only exist in certain countries. |
dqc:FunctionalDependencyConstraints |
| Legal Value Rules | Legal value rules are the explicit
definition of the allowed values for a certain property. |
The property foo:gender must only
contain the values “male”, “female”, “m”, or “f”. |
dqc:LegalValueConstraints |
| Legal Value Range Rules | Legal value range rules are the explicit
definition of the allowed value range for properties holding numerical values. A value range contains an upper and/or lower limit. |
The property foo:population
must only contain values greater than zero. |
dqc:ValueRangeConstraints |
| Illegal Value Rules | Illegal value rules are the explicit
definition of the values that may not be assigned to a certain property. |
The property foo:gender may never
contain the value “mail”. |
dqc:LegalValueConstraints |
| Illegal Value Range Rules | Illegal value range rules are the explicit
definition of prohibited value ranges for properties holding numerical values. A value range contains an upper and/or lower limit. |
The property foo:population
must not contain values less than one. |
dqc:ValueRangeConstraints |
| Unique Value Rules | Unique value rules define properties that
may contain each literal value not more than once within a defined collection of values. |
Each value for property foo:ISBN in
instances of class foo:Book may not occur more than once. |
dqc:UniquenessConstraints |
| Outdated Value Rules | Outdated value rules are rules that
identify instances that represent an outdated state of the corresponding real world entity. |
Instances of the class foo:Offer are
outdated, if its value for foo:validThrough is elder than the current date and time. |
Not covered yet |
