#ask: syntax – "annotation" query marker

#ask: syntax details:
Syntax	@annotation
Description	Marks an inline query as part of an annotation
Datatype support	All datatypes
Component	query marker
Software	Semantic MediaWiki
Since version	Semantic MediaWiki 3.0.0 Released on 11 October 2018 and compatible with MW 1.27.0 - 1.31.x.
Keyword	self-reference · post process · annotation

The @annotation query marker marks an inline query as part of an annotation. It was introduced in Semantic MediaWiki 3.0.0Released on 11 October 2018 and compatible with MW 1.27.0 - 1.31.x.1.

Rationale

It is possible to use inline queries (#ask or #show) to create semantic annotations. In other words, you can set the value of a semantic property to the result of an inline query. Since caching is used, the property value will not be automatically updated when the query result changes.

You can now let Semantic MediaWiki know that the inline query is used inside of a semantic annotation via the annotation query marker. This then allows Semantic MediaWiki to update the property value when the query result changes.

Example

The output of a query used to provide the data value of an annotation:

Syntax

[[SomeProperty::{{#show: {{FULLPAGENAME}} |?AnotherProperty |link=none |@annotation }}]]

Link

<sandbox.semantic-mediawiki.org>: More examples for this query marker

Only add this query marker once to a page if you need this feature for more than one annotation. All of them will make use of the marker.

Note

Post-processing of jobs created by this query marker is done by API-module "smwtask"Allows to invoke and execute internal Semantic MediaWiki tasks.2 See also configuration parameter $smwgPostEditUpdateSets how many jobs should be executed as part of a post-edit event.

See also

• Help page on self-reference inline queries
• https://github.com/SemanticMediaWiki/SemanticMediaWiki/blob/master/src/PostProcHandler.php