MediaWiki extensions manual

WikibaseQualityConstraints Release status: stableCategory:Stable extensions
Implementation	User interfaceCategory:User interface extensions
Description	Allows defining constraints on Wikibase properties and checks that the constraints are met when the properties are used in statements on entities
Author(s)	Students at Hasso-Plattner-Institute and WMDE
Latest version	continuous updates
Compatibility policy	Snapshots releases along with MediaWiki. Master is not backward compatible.Category:Extensions with release branches compatibility policy
MediaWiki	1.26+Category:Extensions with manual MediaWiki version
Database changes	Yes
Composer	wikibase/constraintsCategory:Extensions supporting Composer
Tables	wbqc_constraints
License	GNU General Public License 2.0 or later
Download	Download extension Git [?]: Browse repository (GitHub) Gerrit code review Git commit log Download source tarball Category:Extensions in Wikimedia version control
Parameters $wgWBQualityConstraintsMaximumQuantityId $wgWBQualityConstraintsInstanceOfId $wgWBQualityConstraintsMinimumDateId $wgWBQualityConstraintsAllowedUnitsConstraintId $wgWBQualityConstraintsFormatConstraintId $wgWBQualityConstraintsMandatoryConstraintId $wgWBQualityConstraintsCacheCheckConstraintsTTLSeconds $wgWBQualityConstraintsTypeCheckMaxEntities $wgWBQualityConstraintsSubclassOfRelationId $wgWBQualityConstraintsCheckOnEntityDurationWarningSeconds $wgWBQualityConstraintsSparqlThrottlingFallbackDuration $wgWBQualityConstraintsEnableSuggestionConstraintStatus $wgWBQualityConstraintsOneOfConstraintId $wgWBQualityConstraintsLabelInLanguageConstraintId $wgWBQualityConstraintsInverseConstraintId $wgWBQualityConstraintsValueRequiresClaimConstraintId $wgWBQualityConstraintsSuggestionConstraintId $wgWBQualityConstraintsCheckFormatConstraint $wgWBQualityConstraintsTypeConstraintId $wgWBQualityConstraintsWikibaseMediaInfoId $wgWBQualityConstraintsCheckDurationWarningSeconds $wgWBQualityConstraintsShowConstraintViolationToNonLoggedInUsers $wgWBQualityConstraintsUsedAsQualifierConstraintId $wgWBQualityConstraintsSingleBestValueConstraintId $wgWBQualityConstraintsExceptionToConstraintId $wgWBQualityConstraintsCheckReferences $wgWBQualityConstraintsMultiValueConstraintId $wgWBQualityConstraintsInstanceOfRelationId $wgWBQualityConstraintsEnableConstraintsCheckJobsRatio $wgWBQualityConstraintsLexemeLanguageConstraintId $wgWBQualityConstraintsCacheCheckConstraintsResults $wgWBQualityConstraintsIntegerConstraintId $wgWBQualityConstraintsDifferenceWithinRangeConstraintId $wgWBQualityConstraintsInstanceOrSubclassOfRelationId $wgWBQualityConstraintsConstraintCheckedOnQualifiersId $wgWBQualityConstraintsUsedAsReferenceConstraintId $wgWBQualityConstraintsFormatCacheMapSize $wgWBQualityConstraintsSymmetricConstraintId $wgWBQualityConstraintsPropertyScopeId $wgWBQualityConstraintsYearUnit $wgWBQualityConstraintsAsReferencesId $wgWBQualityConstraintsWikibasePropertyId $wgWBQualityConstraintsSparqlHasWikibaseSupport $wgWBQualityConstraintsContemporaryConstraintId $wgWBQualityConstraintsSparqlMaxMillis $wgWBQualityConstraintsPropertyConstraintId $wgWBQualityConstraintsFormatCheckerShellboxRatio $wgWBQualityConstraintsCheckQualifiers $wgWBQualityConstraintsValueTypeConstraintId $wgWBQualityConstraintsConstraintStatusId $wgWBQualityConstraintsConstraintCheckedOnMainValueId $wgWBQualityConstraintsAdditionalSparqlEndpoints $wgWBQualityConstraintsSeparatorId $wgWBQualityConstraintsSecondUnit $wgWBQualityConstraintsClassId $wgWBQualityConstraintsMaximumDateId $wgWBQualityConstraintsStartTimePropertyIds $wgWBQualityConstraintsPropertiesWithViolatingQualifiers $wgWBQualityConstraintsCacheCheckConstraintsMaximumRevisionIds $wgWBQualityConstraintsAsQualifiersId $wgWBQualityConstraintsAsMainValueId $wgWBQualityConstraintsPropertyScopeConstraintId $wgWBQualityConstraintsWikibaseSenseId $wgWBQualityConstraintsMinimumQuantityId $wgWBQualityConstraintsItemRequiresClaimConstraintId $wgWBQualityConstraintsConstraintEntityTypesId $wgWBQualityConstraintsAllowedEntityTypesConstraintId $wgWBQualityConstraintsWikibaseLexemeId $wgWBQualityConstraintsWikibaseItemId $wgWBQualityConstraintsNoneOfConstraintId $wgWBQualityConstraintsDistinctValuesConstraintId $wgWBQualityConstraintsWikibaseFormId $wgWBQualityConstraintsConstraintScopeId $wgWBQualityConstraintsConstraintClarificationId $wgWBQualityConstraintsSyntaxClarificationId $wgWBQualityConstraintsFormatAsARegularExpressionId $wgWBQualityConstraintsNamespaceId $wgWBQualityConstraintsMandatoryQualifierConstraintId $wgWBQualityConstraintsEndTimePropertyIds $wgWBQualityConstraintsQualifierOfPropertyConstraintId $wgWBQualityConstraintsRangeConstraintId $wgWBQualityConstraintsEnableConstraintsCheckJobs $wgWBQualityConstraintsRelationId $wgWBQualityConstraintsCommonsLinkConstraintId $wgWBQualityConstraintsSparqlTimeoutExceptionClasses $wgWBQualityConstraintsNoBoundsConstraintId $wgWBQualityConstraintsSparqlEndpoint $wgWBQualityConstraintsCheckDurationInfoSeconds $wgWBQualityConstraintsUsedForValuesOnlyConstraintId $wgWBQualityConstraintsLanguagePropertyId $wgWBQualityConstraintsAllowedQualifiersConstraintId $wgWBQualityConstraintsConflictsWithConstraintId $wgWBQualityConstraintsSingleValueConstraintId $wgWBQualityConstraintsConstraintCheckedOnReferencesId $wgWBQualityConstraintsFormatCheckerKnownGoodRegexPatterns $wgWBQualityConstraintsEnableConstraintsImportFromStatements $wgWBQualityConstraintsSubclassOfId $wgWBQualityConstraintsCitationNeededConstraintId $wgWBQualityConstraintsCheckOnEntityDurationInfoSeconds $wgWBQualityConstraintsPropertyId
Hooks used ArticlePurge Category:ArticlePurge extensions BeforePageDisplay Category:BeforePageDisplay extensions LoadExtensionSchemaUpdates Category:LoadExtensionSchemaUpdates extensions WikibaseChangeNotification Category:WikibaseChangeNotification extensions
Quarterly downloads	8 (Ranked 108th)
Translate the WikibaseQualityConstraints extension if it is available at translatewiki.net
Issues	Open tasks · Report a bug

The WikibaseQualityConstraints extension allows defining constraints on Wikibase Properties and checks that the constraints are met when the Properties are used in Statements on Entities. The checks are strictly informational: the extension does not ensure that the constraints are met, it merely informs editors when they are being violated. For more information, see the Property constraints portal on Wikidata.

Installation

• Download and move the extracted WikibaseQualityConstraints folder to your extensions/ directory.
  Developers and code contributors should install the extension from Git instead, using:cd extensions/
git clone https://gerrit.wikimedia.org/r/mediawiki/extensions/WikibaseQualityConstraints
• Only when installing from Git, run Composer to install PHP dependencies, by issuing composer install --no-dev in the extension directory. (See T173141 for potential complications.)Category:Extensions requiring Composer with git
• Add the following code at the bottom of your LocalSettings.php file:

  wfLoadExtension( 'WikibaseQualityConstraints' );
  

• Configure as required.
• Done – Navigate to Special:Version on your wiki to verify that the extension is successfully installed.

Configuration

See the "config" section in the extension.json file.

See also

• Wikibase Constraint Violations Export – Allows to export constraint violations to JSON via a maintenance script
• Top Wikibase extensions — Curated list of key Wikibase extensions

This extension is being used on one or more Wikimedia projects. This probably means that the extension is stable and works well enough to be used by such high-traffic websites. Look for this extension's name in Wikimedia's CommonSettings.php and InitialiseSettings.php configuration files to see where it's installed. A full list of the extensions installed on a particular wiki can be seen on the wiki's Special:Version page.

This extension is included in the following wiki farms/hosts and/or packages: Miraheze Category:Extensions included in Miraheze ProWikiCategory:Extensions included in ProWiki WikiForgeCategory:Extensions included in WikiForge This is not an authoritative list. Some wiki farms/hosts and/or packages may contain this extension even if they are not listed here. Always check with your wiki farms/hosts or bundle to confirm.