Special properties (visible)

From semantic-mediawiki.org

This help page lists the visible special properties. Visible special properties are viewable by the user via the browsing interfaces of the wiki.

The following table gives an overview of all 35 visible special properties provided by Semantic MediaWiki:

NameDescriptionHelp pageSinceKey
Allows valueLists one permissible value for a propertySpecial property "Allows value"1.0
_PVAL
Corresponds toGives the conversion factor for some unit of a physical quantity and the possible names for that unitSpecial property "Corresponds to"1.0
_CONV
Display unitsSpecifies the a comma-separated list of units or formats that a property should use in displaySpecial property "Display units"1.0
_UNIT
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
_URI
Has typeAssigns a datatype to a propertySpecial property "Has type"1.0
_TYPE
Imported fromAllows users to reuse elements of external vocabularies directly within the wikiSpecial property "Imported from"1.0
_IMPO
Provides serviceAdds service links to propertiesSpecial property "Provides service"1.0
_SERV
Subproperty ofLets you indicate that one property is a subproperty of anotherSpecial property "Subproperty of"1.0
_SUBP
Has fieldsDefines a short list of fields with a fixed type and order for datatype RecordSpecial property "Has fields"1.5.0
_LIST
Subcategory ofLets you explicitly indicate that one category is a subcategory of anotherSpecial property "Subcategory of"1.5.0
_SUBC
Has subobjectHolds the subobjects set on a pageSpecial property "Has subobject"1.7.0
_SOBJ
Query depthHolds the value of the property depth of a querySpecial property "Query depth"1.8.0
_ASKDE
Query formatHolds the name of the result format used in a querySpecial property "Query format"1.8.0
_ASKFO
Query sizeHolds the value of the number of conditions in a querySpecial property "Query size"1.8.0
_ASKSI
Query stringHolds the conditions of the query as a stringSpecial property "Query string"1.8.0
_ASKST
Query durationHolds the value of the duration a query took to executeSpecial property "Query duration"1.9.0
_ASKDU
MIME typeHolds the MIME type of an uploaded fileSpecial property "MIME type"1.9.1
_MIME
Media typeHolds the Media type of an uploaded fileSpecial property "Media type"1.9.1
_MEDIA
Allows patternPattern to match a permissible valueSpecial property "Allows pattern"2.4.0
_PVAP
Display precision ofPrecision in digitsSpecial property "Display precision of"2.4.0
_PREC
Has property descriptionAdds localizable context help to propertiesSpecial property "Has property description"2.4.0
_PDESC
Has uniqueness constraintAllows to restrict value annotation to be uniqueSpecial property "Has uniqueness constraint"2.4.0
_PVUC
Language codeHandles BCP47 conform language codes specifying the language of the annotated textSpecial property "Language code"2.4.0
_LCODE
Allows value listAdds a reference to a list of permissible values for a propertySpecial property "Allows value list"2.5.0
_PVALI
External formatter URIDeclares an external URL with a place holder $1Special property "External formatter URI"2.5.0
_PEFU
External identifierSpecifies an external identifierSpecial property "External identifier"2.5.0
_PEID
Has preferred property labelAdds localizable labels to a propertySpecial property "Has preferred property label"2.5.0
_PPLB
Is edit protectedStores the status of an edit restriction of a pageSpecial property "Is edit protected"2.5.0
_EDIP
Query parametersHolds the parameters a query used to select its outputSpecial property "Query parameters"2.5.0
_ASKPA
Query sourceHolds the identifier of an alternative (e.g. remote) query sourceSpecial property "Query source"2.5.0
_ASKSC
Change propagationHolds the new property specification of a property or category pageSpecial property "Change propagation"3.0.0
_CHGPRO
Is property groupProperty to identify a group category and to support a simple grouping feature in Special:BrowseSpecial property "Is property group"3.0.0
_PPGR
Query stateHolds the status code a query uses to define its internal stateSpecial property "Query state"3.0.0
_ASKCO

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

Special property "Subcategory of"Lets you explicitly indicate that one category is a subcategory of another is only a visible 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".