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In order to validate the effectiveness of social sharing and other similar efforts for Wikimedia projects, a parameter "wprov" will be appended to URLs on a case-by-case basis. This article exists to keep track of reserved values.
Description of wprov parameter
The format of the parameter name is ?wprov=<3_char_feature><platform_one_char><major_version_of_feature_uint>.
Currently reserved values
sfii1: Share a Fact on iOS for image cards, feature version 1
sfti1: Share a Fact on iOS for text shares, feature version 1
sfsi1: Standard sharing on iOS for text shares, feature version 1
sfia1: Share a Fact on Android for image cards, feature version 1
sfta1: Share a Fact on Android for text shares, feature version 1
sfla1: Share a link to an article (from lead image toolbar, or link preview), feature version 1
tssw1: TestSearchSatisfaction schema for Special:Search in WikimediaEvents, feature version 1
srpw1: Search Result Page web, feature version 1. Attached to result links in Special:Search.
sdlw1: Search Deep Link web, feature version 1. Users selected by the TestSearchSatisfaction schema have this added to all article links when arriving at a page with either the srpw1 or sdlw1 wprov.
iwsw1: Interwiki Search web, feature version 1. Queries that have been chosen to participate in the interwiki search test will have wprov=iwsw1 for any cross wiki search results. This is limited to "inline" search results, and not the sidebar as used in itwiki.