To prevent conflicts in new namespaces added by extensions, please list your extension's custom namespaces here on the list of extension default namespaces. If you define a constant for a custom namespace, list it here, too.
Note that these are only default namespaces. All extensions defining new namespaces should provide the installer with a method of configuring the extension to use a different range of namespaces for its custom namespaces.
In general, extensions should reserve namespace numbers in blocks of 10, where no known namespaces are already added by MediaWiki core or any known extensions (see discussion). Each block is intended for an extension to use sequentially; in particular, extensions that add more than one custom namespace should not reserve an additional block for each additional namespace unless the extension has exhausted its current block.
Namespace numbers between 3000 and 4999 should not be used; these numbers are reserved for wikis to define their custom namespaces. Furthermore, care should be taken when selecting numbers under 1000 since this range has historically been quite heavily used by extensions and sites alike (numbers under 200 should probably be avoided altogether).
Naturally, some namespaces listed on this page will overlap and violate the recommendations. The recommendations are good practices new extensions should adhere to avoid conflicts; for legacy reasons, old extensions that have already created conflicts and bad practices can't simply be changed but are listed here to help avoid even more conflicts.
Negative IDs Warning: Do not use negative IDs for extensions. Ever. MediaWiki Core ID Name Constant RemarkTwo namespaces have negative indexes and have special purposes. You cannot create or delete pages in these namespaces, and there are no corresponding discussion namespaces.
-2 Media: NS_MEDIA Alias for direct links to media files -1 Special: NS_SPECIAL Holds special pages ID 0–99 MediaWiki Core ID Name Constant Remark 0 : NS_MAIN 1 Talk: NS_TALK 2 User: NS_USER 3 User_talk: NS_USER_TALK 4 Project: NS_PROJECT 5 Project_talk: NS_PROJECT_TALK 6 File: NS_FILE 7 File_talk: NS_FILE_TALK 8 MediaWiki: NS_MEDIAWIKI 9 MediaWiki_talk: NS_MEDIAWIKI_TALK 10 Template: NS_TEMPLATE 11 Template_talk: NS_TEMPLATE_TALK 12 Help: NS_HELP 13 Help_talk: NS_HELP_TALK 14 Category: NS_CATEGORY 15 Category_talk: NS_CATEGORY_TALKIf the core is to define any new default namespace, it will likely continue from here with 16–17; please take care to avoid this area.
LiquidThreads ID Name Constant Remark 90 Thread: NS_LQT_THREAD 91 Thread_talk: NS_LQT_THREAD_TALK 92 Summary: NS_LQT_SUMMARY 93 Summary_talk: NS_LQT_SUMMARY_TALK ID 100–199 Warning: The namespaces in the range 100–199 have historically been heavily used by both extensions and individual wikis for their custom namespaces. Because of this, it is generally recommended to avoid this range for new namespaces. Wikimedia FoundationMany Wikimedia Foundation wikis have site-specific namespaces in this range. Including the Portal namespace (100) on most Wikipedia projects, Creator namespace (100) on Wikimedia Commons, the Extension namespace (102) on mediawiki.org, the Subject namespace (112) on English Wikibooks, and many others.
100–119 Semantic MediaWiki ID Name Constant Remark 100 Relation: SMW_NS_RELATION Introduced in version 0.1, no longer used as of version 1.0, and removed in version 1.5.0. 101 Relation_talk: SMW_NS_RELATION_TALK Introduced in version 0.1, no longer used as of version 1.0, and removed in version 1.5.0. 102 Property: SMW_NS_PROPERTY Introduced in version 0.1.SF_NS_FORM. 107 Form_talk: PF_NS_FORM_TALK Before the extension was renamed, this namespace's constant name was SF_NS_FORM_TALK. DPLforum ID Name Constant Remark 110 Forum: NS_FORUM Before r93293, this namespace number was not hardcoded, and a number of wikis previously used other numbers, with 110 used for unrelated namespaces. 111 Forum_talk: NS_FORUM_TALK Before r93293, this namespace number was not hard coded, and several wikis previously used other numbers, with 111 used for unrelated namespaces. Semantic Drilldown ID Name Constant Remark 170 Filter: SD_NS_FILTER Stopped being used in version 2.0; removed entirely in version 2.1 171 Filter_talk: SD_NS_FILTER_TALK Stopped being used in version 2.0; removed entirely in version 2.1
ID 200–299
Wikimedia Foundation
Maps_NS_LAYER). 421 GeoJson_talk: NS_GEO_JSON_TALK Formerly named "Layer_talk" (Maps_NS_LAYER_TALK)
MediaUploader is a fork/replacement of UploadWizard. These two extensions cannot operate on a wiki at the same time.
UploadWizard and MediaUploader ID Name Constant Remark 460 Campaign: NS_CAMPAIGN JSON describing metadata for an Upload Campaign 461 Campaign_talk: NS_CAMPAIGN_TALK 480–489 JsonConfig ID Name Constant Remark 482 Config: NS_CONFIG JSON Configuration blob used by multiple systems 483 Config_talk: NS_CONFIG_TALK 486 Data: NS_DATA Additional JSON data. As of 2015 you can store arbitrary valid JSON in the subnamespaceData:Json, e.g., Data:Json:MyDataset. This is a developing convention on Wikimedia projects that use JsonConfig and Graph.
$wgTimedTextNS. Namespace number was formerly 700. 711 TimedText_talk: NS_TIMEDTEXT_TALK ID can be changed with $wgTimedTextNS. Namespace number was formerly 701. TimedMediaHandler reserves namespaces for timed text tracks.
While this extension does not currently reserve a namespace in its code, it highly recommends creating a custom one for storing access control lists. Therefore, this has been reserved for sysadmins to choose a namespace easily should they not want the pressure to choose a random namespace.
AccessControl ID Name Constant Remark 730 AccessControlGroup: NS_ACCESSCONTROLGROUP 731 AccessControlGroup_talk: NS_ACCESSCONTROLGROUP_TALK Flex Diagrams ID Name Constant Remark 740 BPMN: FD_NS_BPMN 741 BPMN talk: FD_NS_BPMN_TALK 742 Gantt: FD_NS_GANTT 743 Gantt talk: FD_NS_GANTT_TALK 744 Mermaid: FD_NS_MERMAID 745 Mermaid talk: FD_NS_MERMAID_TALK 746 Drawio: FD_NS_DRAWIO 747 Drawio talk: FD_NS_DRAWIO_TALK ID 800–899 Scribunto ID Name Constant Remark 828 Module: NS_MODULE 829 Module_talk: NS_MODULE_TALK SecurePoll ID Name Constant Remark 830 SecurePoll: NS_SECUREPOLL Set $wgSecurePollUseNamespacetrue to enable. 831 SecurePoll_talk: NS_SECUREPOLL_TALK Set $wgSecurePollUseNamespace true to enable. CommentStreams ID Name Constant Remark 844 CommentStreams: NS_COMMENTSTREAMS may be overridden by $wgCommentStreamsNamespaceIndex 845 CommentStreams_talk: NS_COMMENTSTREAMS_TALK Presently unused. CentralNotice ID Name Constant Remark 866 CNBanner: NS_CN_BANNER Staging area for pending banner translations. 867 CNBanner_talk: NS_CN_BANNER_TALK Presently unused.
ID 1000+
Piwo ID Name Constant Remark 1024 Gram: NS_GRAM 1025 Gram_talk: NS_GRAM_TALK IIIF ID Name Constant Remark 1230 IIIF: NS_IIIF Holds JSON for IIIF / IIIF-related content. 1231 IIIF_talk: NS_IIIF_TALK
1240–1249
Reconciliation API ID Name Constant Remark 1240 Recon: NS_RECON Holds JSON for profiling schemas. 1241 Recon talk: NS_RECON_TALK Wikistories ID Name Constant Remark 1704 Story: NS_STORY 1705 Story_talk: NS_STORY_TALK CampaignEvents ID Name Constant Remark 1728 Event: NS_EVENT 1729 Event_talk: NS_EVENT_TALK
ID 2000+
VisualData ID Name Constant Remark 2220 Data: NS_DATA Note: optional manual config Extension:VisualData 2228 VisualDataSchema: NS_VISUALDATASCHEMA 2229 VisualDataSchema talk: NS_VISUALDATASCHEMA_TALK 2230 VisualDataQuery: NS_VISUALDATAQUERY 2231 VisualDataQuery talk: NS_VISUALDATAQUERY_TALK ContactManager ID Name Constant Remark 2260 ContactManager: NS_CONTACTMANAGER 2261 ContactManagerTalk talk: NS_CONTACTMANAGER Semantic_Genealogy ID Name Constant Remark 2700 Genealogy: NS_SGENEALOGY 2701 Genealogy_talk: NS_SGENEALOGY_TALK 2702 Genealogy_template: NS_SGENEALOGY_TEMPLATE 2703 Genealogy_template_talk: NS_SGENEALOGY_TEMPLATE_TALK 2704 Genealogy_form: NS_SGENEALOGY_FORM 2705 Genealogy_form_talk: NS_SGENEALOGY_FORM_TALK DataMaps ID Name Constant Remark 2900 Map: NS_MAP Allows users to create maps that can later be included on other pages.
$wgDataMapsNamespaceId is set to managed (default). 2901 Map_talk: NS_MAP_TALK
ID 3000+: Reserved for sites' custom namespaces
The range of 3000–4999 is reserved for sites to define their custom namespaces without fear of conflict. No known extensions define namespaces in this range; new extensions should also avoid it.
In accordance with this, the NamespaceManager , BlueSpiceNamespaceManager , ManageWiki extensions create custom namespaces using the range from 3000 to 4999.
ID 5000+ Newsletter ID Name Constant Remark 5500 Newsletter: NS_NEWSLETTER 5501 Newsletter_talk: NS_NEWSLETTER_TALK MWUnit ID Name Constant Remark 5750 Test: NS_TEST 5751 Test_talk: NS_TEST_TALK Wikispeech ID Name Constant Remark 5770 Speech_recording: NS_SPEECH_RECORDING Constant used by the SpeechDataCollector extension 5771 Speech_recording_talk: NS_SPEECH_RECORDING_TALK Constant used by the SpeechDataCollector extension 5772 Pronunciation_lexicon: NS_PRONUNCIATION_LEXICON Constant used by the Wikispeech extension 5773 Pronunciation_lexicon_talk: NS_PRONUNCIATION_LEXICON_TALK Constant used by the Wikispeech extension ID 7000+ OpenSemanticLab ID Name Constant Remark 7010 Material: NS_MATERIAL 7011 Material_Talk: NS_MATERIAL_TALK 7020 Device: NS_DEVICE 7021 Device_Talk: NS_DEVICE_TALK 7022 Software: NS_SOFTWARE 7023 Software_Talk: NS_SOFTWARE_TALK 7030 Location: NS_LOCATION 7031 Location_Talk: NS_LOCATION_TALK 7040 FileType: NS_FILETYPE 7041 FileType_Talk: NS_FILETYPE_TALK 7042 DataType: NS_DATATYPE 7043 DataType_Talk: NS_DATATYPE_TALK 7050 OU: NS_OU 7051 OU_Talk: NS_OU_TALK 7060 Project: NS_OSL_PROJECT 7061 Project_Talk: NS_OSL_PROJECT_TALK 7070 Person: NS_PERSON 7071 Person_Talk: NS_PERSON_TALK 7080 Model: NS_MODEL 7081 Model_Talk: NS_MODEL_TALK 7100 LabNote: NS_LABNOTE 7101 LabNote_Talk: NS_LABNOTE_TALK 7110 LabProcess: NS_LABPROCESS 7111 LabProcess_Talk: NS_LABPROCESS_TALK 7120 LabObject: NS_LABOBJECT 7121 LabObject_Talk: NS_LABOBJECT_TALK 7200 OslTemplate: NS_OSLTEMPLATE 7201 OslTemplate_Talk: NS_OSLTEMPLATE_TALK 7210 OslForm: NS_OSLFORM 7211 OslForm_Talk: NS_OSLFORM_TALK 7300 Field: NS_FIELD 7301 Field_Talk: NS_FIELD_TALK 7310 Term: NS_TERM 7311 Term_Talk: NS_TERM_TALK 7320 Statement: NS_STATEMENT 7321 Statement_Talk: NS_STATEMENT_TALK 7330 CR: NS_CR 7331 CR_Talk: NS_CR_TALK ID 10,000+The WSSpaces extension uses namespace constants >50000 to allow users to define custom namespaces.
Archived extensions and removed namespacesSeveral extensions that added new namespaces have since been archived, and some namespaces that were added by an extension were later removed; these are listed here since these namespaces may appear in old database dumps from wikis which used these extensions, and some old wikis may continue to use the extensions. It is very strongly recommended to avoid reusing these namespace numbers, as wikis that previously used the old extensions will have log entries etc. related to those pages; however, these numbers can be reserved by new extensions if desired.
Extensions are listed here ordered by the first namespace number they added.
WikiLexicalData ID Name Constant Remark 16 Expression: NS_EXPRESSION 17 Expression_talk: 24 DefinedMeaning: NS_DEFINEDMEANING 25 DefinedMeaning_talk: RefHelper ID Name Constant Remark 120 Cite: NS_CITE 121 Cite_talk: NS_CITE_TALK DeleteQueue ID Name Constant Remark 140 Deletion: NS_DELETION 200 Deletion discussion: TrustedMath ID Name Constant Remark 262 Math: NS_TRUSTEDMATH 263 Math_talk: NS_TRUSTEDMATH_TALK Extension:EmbedScript ID Name Constant Remark 280 JSApplet: NS_JSAPPLET 281 JSApplet_talk: NS_JSAPPLET_TALK MOOC ID Name Constant Remark 350 Mooc: NS_MOOC 351 Mooc_talk: NS_MOOC_TALK Wiki2LaTeX ID Name Constant Remark 400 Wiki2LaTeX: NS_WIKI2LATEX 401 Wiki2LaTeX_talk: NS_WIKI2LATEX_TALK QuizTabulate ID Name Constant Remark 430 Quiz: QuizTabulate_NS_QUIZ 431 Quiz_talk: QuizTabulate_NS_QUIZ_TALK Education Program ID Name Constant Remark 446 Education_Program: EP_NS 447 Education_Program_talk: EP_NS_TALK BoilerRoom ID Name Constant Remark 450 Boilerplate: NS_BOILERPLATE Can be customized via$wgbrNamespaceIndex . Used the number 300 prior to version 0.92. 451 Boilerplate_talk: NS_BOILERPLATE_TALK Can be customized via $wgbrNamespaceIndex . Used the number 301 prior to version 0.92. ZeroBanner ID Name Constant Remark 480 Zero: NS_ZERO JSON configuration (outdated) describing Zero site behavior for this carrier
The documentation of this extension's namespaces on this page was changed several times; it is not known if these changes were correcting wrong information, or if the namespace data was repeatedly changed in the extension itself.
NagiosConfig ID Name Constant Remark 600 NagiosTemplate: NS_NAGIOS_TEMPLATE 601 NagiosTemplate talk: NS_NAGIOS_TEMPLATE_TALK 602 NagiosHostType: NS_NAGIOS_HOSTTYPE 603 NagiosHostType talk: NS_NAGIOS_HOSTTYPE_TALK 604 NagiosCommand: NS_NAGIOS_COMMAND 605 NagiosCommand talk: NS_NAGIOS_COMMAND_TALK 606 NagiosResource: NS_NAGIOS_RESOURCE 607 NagiosResource talk: NS_NAGIOS_RESOURCE_TALK 608 NagiosServiceCommand: NS_NAGIOS_SERVICECOMMAND 609 NagiosServiceCommand talk: NS_NAGIOS_SERVICECOMMAND_TALK GitAccess ID Name Constant Remark 730 GitAccess_root: NS_GITACCESS_ROOT 731 GitAccess_root_talk: NS_GITACCESS_ROOT_TALK QPoll ID Name Constant Remark 800 Interpretation: NS_QP_INTERPRETATION 801 Interpretation_talk: NS_QP_INTERPRETATION_TALK QPoll reserves namespaces for interpretation scripts. SemanticMustacheFormat ID Name Constant Remark 806 Mustache: SRFM_NS_MUSTACHE 807 Mustache_talk: SRFM_NS_MUSTACHE_TALK Jade ID Name Constant Remark 810 Jade: NS_JADE 811 Jade_talk: NS_JADE_TALK R ID Name Constant Remark 814 R: NS_EXTR Used for help pages and (interactive) examples. 815 R_talk: NS_EXTR_TALKHidden pages require custom namespaces to be added manually, and it is recommended that namespace numbers start at 1000.
PackageForce ID Name Constant Remark 1300 PackageForce: NS_PACKAGEFORCE 1301 PackageForce_talk: NS_PACKAGEFORCE_TALK Gadgets ID Name Constant Remark 2300 Gadget: NS_GADGET 2301 Gadget_talk: NS_GADGET_TALK 2302 Gadget_definition: NS_GADGET_DEFINITION 2303 Gadget_definition_talk: NS_GADGET_DEFINITION_TALK CourseEditor ID Name Constant Remark 2800 Course: NS_COURSE 2801 Course_talk: NS_COURSE_TALK See alsoRetroSearch is an open source project built by @garambo | Open a GitHub Issue
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