Help:Namespaces

Table of Contents

This help page provides an overview of the namespaces and their usage by Semantic MediaWiki and related extensions.

Extensions

Semantic MediaWiki

ID	Name	Constant	Note
100	Relation	SMW_NS_RELATION	Support introduced with Semantic MediaWiki 0.1Released on 30 September 2005 and compatible with MW 1.4.x - 1.6.x., no longer used as of Semantic MediaWiki 1.0Released on 31 December 2007 and compatible with MW 1.9.x - 1.12.x., and support dropped with Semantic MediaWiki 1.5.0Released on 7 March 2010 and compatible with MW 1.14.x - 1.17.x..
101	Relation_talk	SMW_NS_RELATION_TALK	See namespace 100 (Relation).
102	Property	SMW_NS_PROPERTY	Support introduced with Semantic MediaWiki 0.1Released on 30 September 2005 and compatible with MW 1.4.x - 1.6.x..
103	Property_talk	SMW_NS_PROPERTY_TALK	See namespace 102 (Property).
104	Type	SMW_NS_TYPE	Support introduced with Semantic MediaWiki 0.1Released on 30 September 2005 and compatible with MW 1.4.x - 1.6.x., no longer used as of Semantic MediaWiki 1.6.0Released on 30 July 2011 and compatible with MW 1.15.x - 1.18.x., and support dropped with Semantic MediaWiki 3.0.0Released on 11 October 2018 and compatible with MW 1.27.0 - 1.31.x.12
105	Type_talk	SMW_NS_TYPE_TALK	See namespace 104 (Type).
108	Concept	SMW_NS_CONCEPT	Support introduced with Semantic MediaWiki 1.2.0Released on 10 July 2008 and compatible with MW 1.11.x - 1.14.x..
109	Concept_talk	SMW_NS_CONCEPT_TALK	See namespace 108 (Concept).
112	Rule	SMW_NS_RULE	Support introduced with Semantic MediaWiki 3.0.0Released on 11 October 2018 and compatible with MW 1.27.0 - 1.31.x.3, never used, and support dropped with Semantic MediaWiki 5.0.0Released on 10 March 2025 and compatible with MW 1.39.0 - 1.43.x.4
113	Rule_talk	SMW_NS_RULE_TALK	See namespace 112 (Rule).
114	smw/schema	SMW_NS_SCHEMA	Allows to describe schema types individually either in JSON or YAML (where available5) according to schema types provided in configuration parameter $smwgSchemaTypesSets the mappings between a specific schema type, an accompanying schema group and a possible schema interpreter. Support introduced with Semantic MediaWiki 3.0.0Released on 11 October 2018 and compatible with MW 1.27.0 - 1.31.x..63
115	smw/schema_talk	SMW_NS_SCHEMA_TALK	See namespace 114 (smw/schema).

Extension "Page Forms"

ID	Name	Constant	Note
106	Form	PF_NS_FORM	In case you are still using Semantic Forms (now extension "Page Forms"Allows to create and use forms for adding and editing pages with and without semantic data) the constant is called SF_NS_FORM
107	Form_talk	PF_NS_FORM_TALK	See namespace 106 (Form).

Extension "Semantic Drilldown"

ID	Name	Constant	Note
170	Filter	SD_NS_FILTER	No longer used, as of version 2.0, support dropped with version 2.1
171	Filter_talk	SD_NS_FILTER_TALK	See namespace 170 (smw/schema).

Configuration

Provided by Semantic MediaWiki

1. configuration parameter $smwgNamespacesWithSemanticLinksDefines for which namespaces the semantic links and annotations are to be evaluated - Allows to set which namespaces Semantic MediaWiki should use
2. configuration parameter $smwgNamespaceIndexSets the index of the first namespace to be used by Semantic MediaWiki - Allows to set the indexes for namespaces for usage by Semantic MediaWiki
3. configuration parameter $smwgHistoricTypeNamespaceSets whether the namespaces "Type" and "Type talk" can be accessed - Allows to set whether the "Type" namespaces are accessible

Provided by MediaWiki

Starting with Semantic MediaWiki 2.5.0Released on 14 March 2017 and compatible with MW 1.23.0 - 1.29.x. the namespaces "Property" and "Concept" are automatically added to the following two configuration parameters which are provided by MediaWiki itself.7

1. configuration parameter $wgContentNamespaces (MediaWiki.org) - Allows to set which namespaces are to be acknowledged as containing useful content

  Note: 

• If you are upgrading from Semantic MediaWiki 2.4.x and earlier you may want to run maintenance script "updateArticleCount.php" (MediaWiki.org) to update the statistics displayed on special page "Statistics".
• If you do not want the two namespaces mentioned to be recognized as content namespaces you will have to explicitly set this configuration parameter in you "LocalSettings.php" file after the inclusion of Semantic MediaWiki.

2. configuration parameter $wgNamespacesToBeSearchedDefault (MediaWiki.org) - Allows to set which namespaces are enabled for searching by default

  Note: If you do not want the two namespaces mentioned to be searched by default you will have to explicitly set this configuration parameter in you "LocalSettings.php" file after the inclusion of Semantic MediaWiki.

When also using Wikibase

Both extension "Wikibase" (MediaWiki.org) and extension Semantic MediaWiki add a namespace called "Property". This results in a conflict that must be resolved by renaming the Wikibase property namespace or the Semantic MediaWiki property namespace. Here we describe how to rename the Wikibase property namespace.8 To do this, add the following code to your "LocalSettings.php" file after the inclusion of Semantic MediaWiki and Wikibase.

$wgHooks['CanonicalNamespaces'][] = static function ( &$list ) {
        global $wgExtraNamespaces;
        $wgExtraNamespaces[WB_NS_PROPERTY] = $list[WB_NS_PROPERTY] = 'Wikibase_property';
        $wgExtraNamespaces[WB_NS_PROPERTY_TALK] = $list[WB_NS_PROPERTY_TALK] = 'Wikibase_property_talk';
};

Querying

• See the help page on restricting results to a certain namespace

See also

• See the help page on custom namespaces
• See the help page on namespace prefixes
• See the glossary page on unmaintained namespaces

Issues

• Property namespace to disappear9 in connection with extension "DynamicSidebar" (MediaWiki.org)
• SMW Special pages not created10 in connection with extension "ConfirmEdit" (MediaWiki.org)
• Property namespace disappears11 in connection with MediaWiki 1.27.x