Template:No statement

Template documentation

Usage

Write sparql code to find items with no statement for some property

Template parameters[Edit template data]

This template prefers inline formatting of parameters.

Parameter		Description	Type	Status
item	1 item	name of the item variable (or item id) Example ?item	Unknown	required
property	2	property id Example P31	Unknown	required

Examples

Raw example

{{No statement|?item|P31}}

gives

  OPTIONAL { ?item wdt:P31 ?item_P31 } FILTER(!bound(?item_P31)) .

Example in context, with a full query

{{sparql|query=
select ?item {
  ?item wdt:{{Pid|parent taxon}} ?parent # item with a parent taxon statement
  {{no statement|?item|P31}}             # and with no "instance of" statement 
} limit 10
}}

gives

select ?item {
  ?item wdt:P171 ?parent # item with a parent taxon statement
    OPTIONAL { ?item wdt:P31 ?item_P31 } FILTER(!bound(?item_P31)) .             # and with no "instance of" statement 
} limit 10

Try it!

See also

OPTIONAL { ?{{{1}}} wdt: ?{{{1}}} } FILTER(!bound(?{{{1}}})) .