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GeezerVison is showing professional.wiki — Our Projects Our ProjectsOver 40 open-source MediaWiki extensions and counting, built for our clients and shared with the community. MediaWiki ExtensionsOpen-source MediaWiki extensions created for our clients via our MediaWiki extension development services Native MarkdownMarkdown as a native MediaWiki content modelWrite whole wiki pages in Markdown, rendered as real wiki pages with working links, categories, templates, a table of contents, and full-text search. Wikibase Faceted SearchCreated in 2025 for the NFDI-consortium MaRDIEasily filter and find your Wikibase data. Member AccessMembers-only wikis with email one-time-code loginTurn your MediaWiki into a members-only wiki. Readers log in with an email one-time code, admitted by an allowlist of addresses and domains organized into named groups. Automated ValuesCreated in 2022 for the Luxembourg Ministry of CultureWikibase extension that lets you define rules to automatically set labels or aliases based on Statement values. Page ApprovalsCreated in 2024 for a major multinational corporationIncrease trust in your knowledge base via approval workflows for wiki pages. Persistent Page IdentifiersCreated in 2024 for Meemoo and PodiumkunstenReference your wiki pages with stable, unique identifiers that remain unchanged even when pages are renamed, moved, or deleted and restored. Wikibase ExportCreated in 2022 for the University of MannheimWikibase Export adds a user-friendly and customizable export interface to Wikibase. RulesCreated in 2025 for a major multinational corporationAutomated page categorization based on rules defined via a user-friendly configuration interface SPARQLCreated in 2023 for Freie Universität BerlinRun SPARQL queries and template their results via Lua. Slash CommandsCreated in 2023 for a major multinational corporationIncrease your productivity with slash commands integrated into MediaWiki's visual editor. External ContentCreated in 2022 for Pega SystemsLets you embed and render markdown files into wiki pages. Has special integration with GitHub and Bitbucket. Wikibase RDFCreated in 2022 for the Wikibase Stakeholder GroupWikibase extension that lets you define RDF mappings for Wikibase Entities. Wikibase EDTFCreated in 2021 for the Luxembourg Ministry of CultureWikibase extension for the Extended Date/Time Format (EDTF) Specification that is specifically designed to process more complex dates and times. Wikibase Local MediaCreated in 2020 for the RhizomeAdds support for local media files to Wikibase via a new data type. NetworkCreated in 2020 for KDZ Centre for Public Administration ResearchExtension for visualizing connections between wiki pages via an interactive network graph. Semantic WikibaseCreated in 2020 for Frans AL van der HorstMake Wikibase items and properties available in Semantic MediaWiki. Modern TimelineCreated in 2019 for KDZ Centre for Public Administration ResearchProvides a modern timeline visualization for Semantic MediaWiki as a result format. SubPageListCreated in and maintained since 2010Lightweight MediaWiki extension to display lists of subpages via a customizable parser function. SimpleBatchUploadMaintained since 2019Adds a simple upload interface for uploading multiple files that you can reach via embeddable buttons. MapsCreated in 2009 during Google Summer of CodeGoogle Maps and Leaflet integration for MediaWiki. Embed dynamic and highly customizable maps into your wiki. Features a visual map editor and integration with Semantic MediaWiki. Skins & LibrariesOther open-source projects by Professional Wiki Chameleon SkinCreated in 2014We maintain Chameleon, the most popular mobile and responsive MediaWiki skin. Chameleon is highly customizable, often used by companies to brand their corporate wikis in line with their corporate identity. EDTF Library for PHPMaintained since 2021A PHP library for parsing, representing, and working with values that follow the Extended Date/Time Format specification. Customer TestimonialsProfessional Wiki provided Rhizome with competent and timely custom development work. Making use of all the tools that are available to open source developers today, the team built extensions that follow modern software design guidelines, are easy to install, configure, and maintain, and include good documentation and automated testing. Quite unique in the Mediawiki space! We wished to display SPARQL query results in our Wikibase and commissioned Professional Wiki to develop a solution. They created a flexible extension that is just what we needed. Professional Wiki recently developed an extension for TheaterEncyclopedie quickly and well. They fully live up to their name: they are professional and know everything about (Semantic) MediaWiki! Professional Wiki helped us to fine tune our requirements and created the excellent Wikibase Export extension for non-technical users. It's very clean, clear and user-friendly. From Our Blogs
MediaWiki Extensions
Best MediaWiki ExtensionsWith thousands of extensions available, it can be tough to know which ones are most useful. We've compiled a list of the 15 best MediaWiki extensions.
Karsten Hoffmeyer
March 28, 2025 · 5 min read
Wikibase
Top Wikibase ExtensionsDiscover the top Wikibase extensions in our curated list. These 17 MediaWiki extensions provide enhanced search, data validation, media support, export, and more.
Jeroen De Dauw
March 14, 2025 · 8 min read
News
Wikibase Faceted Search ReleasedA new extension that adds faceted filtering to Wikibase search. Combine full-text and structured queries, filter by Statement values and Item types, and configure it all on-wiki.
Jeroen De Dauw
June 10, 2025 · 3 min read
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