Hilfe:Semantic MediaWiki

Semantic Queries

The power of Semantic MediaWiki is based on queries towards properties or categories.

References:

Pages in this wiki with query examples:

A sample query

According to the sample "E-Mail" property from above, this is an example on how to query a list of pages containing such an "E-Mail" property:

{{#ask:[[E-Mail::+]]
|?E-Mail
|format=table
|mainlabel=Page
|limit=10
}}

Result:

Count

Count the number of queried items:

 {{#ask:[[Category:Dictionary]]|format=count}}

There are currently 0 items in the Category:Dictionary.

Page result column

If you want to move the result wiki page to the right you can use "?=Wiki Page" and "mainlabel=-":

Example:

{{#ask:[[-Has subobject::+]][[PropAbbrDictDefinition::+]]
|?PropAbbrDictDefinition
|?PropAbbrDictContext 
|?=Wiki Page
|format=table
|mainlabel=-
|limit=5
}}

Formatting Output using Templates

In order to format all aspects of the query output, you can assign templates to the query like

{{ #ask:  [[Category:Dictionary]] 
|?Heading 1
|?Heading 2
|?Heading 3
|format=template
|template=<name>
|introtemplate=<name>
|outrotemplate=<name>
}}

References:

Help:Template format

Tips and Tricks

Use link=none if you want to format internal or external links, especially with properties from type URL. Or use "#" for each single field. See also creating-replacement-text-for-URL-in-ask-results-table.
Use <nowiki/> element in order to avoid line breaks if a property is not set. Useful in templates. Example:

{{#if: {{{DefinitionGlobal|}}}|[[PropGlossaryDefinitionGlobal::{{{DefinitionGlobal|}}}]]}}<nowiki/>

Examples

See following examples about using such formatting templates.

Subqueries

See Subqueries.

Query for recent changes

There is a built-in property that can be used to query for modification date. See Modification date.