Special properties (annotable)

From semantic-mediawiki.org

This help page lists the annotable special properties. Annotable special properties may be manually annotated by the user on wiki pages.

The following table gives an overview of all 25 manually annotable special properties provided by Semantic MediaWiki:

NameDescriptionHelp pageSinceKey
Allows valueLists one permissible value for a propertySpecial property "Allows value"1.0
Corresponds toGives the conversion factor for some unit of a physical quantity and the possible names for that unitSpecial property "Corresponds to"1.0
Display unitsSpecifies the a comma-separated list of units or formats that a property should use in displaySpecial property "Display units"1.0
Equivalent URIMarks a page in the wiki as having a well-known meaning beyond this wiki, in an external URISpecial property "Equivalent URI"1.0
Has typeAssigns a datatype to a propertySpecial property "Has type"1.0
Imported fromAllows users to reuse elements of external vocabularies directly within the wikiSpecial property "Imported from"1.0
Provides serviceAdds service links to propertiesSpecial property "Provides service"1.0
Subproperty ofLets you indicate that one property is a subproperty of anotherSpecial property "Subproperty of"1.0
Has fieldsDefines a short list of fields with a fixed type and order for datatype RecordSpecial property "Has fields"1.5.0
Allows patternPattern to match a permissible valueSpecial property "Allows pattern"2.4.0
Display precision ofAllows to define the display precision in digitsSpecial property "Display precision of"2.4.0
Display title ofHolds a specific denote title for an entitySpecial property "Display title of"2.4.0
Has property descriptionAdds localizable context help to propertiesSpecial property "Has property description"2.4.0
Has uniqueness constraintAllows to restrict value annotation to be uniqueSpecial property "Has uniqueness constraint"2.4.0
Language codeHandles BCP47 conform language codes specifying the language of the annotated textSpecial property "Language code"2.4.0
Allows value listAdds a reference to a list of permissible values for a propertySpecial property "Allows value list"2.5.0
External formatter URIDeclares an external URL with placeholders $1, $2Special property "External formatter URI"2.5.0
External identifierSpecifies an external identifierSpecial property "External identifier"2.5.0
Has preferred property labelAdds localizable labels to a propertySpecial property "Has preferred property label"2.5.0
Is edit protectedStores the status of an edit restriction of a pageSpecial property "Is edit protected"2.5.0
Is property groupMarks a category for holding properties belonging to a property groupSpecial property "Is property group"3.0.0

Conversely all special properties not listed here are not manually annotable by the user.

Special property "Subcategory of"Lets you explicitly indicate that one category is a subcategory of another is only a manually annotable special property if option SMW_CAT_HIERARCHY to configuration parameter configuration parameter $smwgCategoryFeaturesSets the behaviour of the query features related to category handling was removed from it".