Open data

Wikidata is a collaboratively edited multilingual knowledge graph hosted by the Wikimedia Foundation. It is a source of open data released under the Creative Commons CC0 public domain dedication. It is for the use of both Wikimedia and external projects. Wikidata is a wiki powered by the software MediaWiki, including its extension for semi-structured data, the Wikibase. As of early 2025, Wikidata had 1.65 billion item statements (semantic triples).

data that is openly accessible and usable to others

DBpedia (from "DB" for "database") is a project aiming to extract structured content from the information created in the Wikipedia project. This structured information is made available on the World Wide Web using OpenLink Virtuoso. DBpedia allows users to semantically query relationships and properties of Wikipedia resources, including links to other related datasets.

Tatoeba is a free collection of example sentences with translations geared towards foreign language learners. It is available in more than 400 languages. Its name comes from the Japanese phrase , meaning 'for example'. It is written and maintained by a community of volunteers through a model of open collaboration. Individual contributors are known as "Tatoebans". It is run by Association Tatoeba, a French non-profit organization funded through donations.

structured data and method for its publication

WordNet is a lexical database of semantic relations between words that links words into semantic relations including synonyms, hyponyms, and meronyms. The synonyms are grouped into synsets with short definitions and usage examples. It can thus be seen as a combination and extension of a dictionary and thesaurus. Its primary use is in automatic text analysis and artificial intelligence applications. It was first created in the English language and the English WordNet database and software tools have been released under a BSD style license and are freely available for download. The latest offici

governing doctrine which holds that citizens have the right to access the documents and proceedings of the government to allow for effective public oversight

Point of access to public data published by the European Union institutions, agencies and other bodies

free and copyleft license meant for data; it is incompatible with the GNU GPL

foundation based on Open Source software for mapping

Zenodo is a general-purpose open repository developed under the European OpenAIRE program and operated by CERN. It allows researchers to deposit research papers, data sets, research software, reports, and any other research related digital artefacts. For each submission, a persistent digital object identifier (DOI) is minted, which makes the stored items easily citeable.

principles for data to facilitate machine readability without human intervention

The Comprehensive Knowledge Archive Network (CKAN) is an open-source open data portal for the storage and distribution of open data. Initially inspired by the package management capabilities of Debian Linux, CKAN has developed into a powerful data catalogue system that is mainly used by public institutions seeking to share their data with the general public.

GTFS, or the General Transit Feed Specification, is a general transit feed specification which defines a common data format for public transportation schedules and associated geographic information. GTFS contains only static or scheduled information about public transport services, and is sometimes known as GTFS Static or GTFS Schedule to distinguish it from the GTFS Realtime extension, which defines how information on the realtime status of services can be shared.

OpenCorporates is a website that shares data on corporations under the copyleft Open Database License. The company, OpenCorporates Ltd, was incorporated on 18 December 2010 by Chris Taggart and Rob McKinnon, and the website was officially launched on 20th.

thesaurus for describing items of art, architecture, and material culture

method or disciplinary lens for treating linked data

non-profit private company limited by guarantee

The Dataverse is an open source web application to share, preserve, cite, explore and analyze research data. Researchers, data authors, publishers, data distributors, and affiliated institutions all receive appropriate credit via a data citation with a persistent identifier (e.g., DOI, or handle).

annual event promoting awareness and use of open data

Figshare is an online open access repository where researchers can preserve and share their research outputs, including figures, datasets, images, and videos. It is free to upload content and free to access, in adherence to the principle of open data. Figshare is one of a number of portfolio businesses supported by Digital Science, a subsidiary of Springer Nature.

website about COVID-19

CC BY compatible license used by the French Government for Open Data

area of research

database of educational and research organizations

X-Road is a centrally managed distributed Data Exchange Layer (DXL) between information systems. Organizations can exchange information over the Internet using X-Road to ensure confidentiality, integrity and interoperability between data exchange parties.

XML format used to describe scientific literature published online

community-led database of research organizations maintained by the ROR community

Safecast is an international, volunteer-centered organization devoted to open citizen science for environmental monitoring. Safecast was established by Sean Bonner, Pieter Franken, and Joi Ito shortly after the Fukushima Daiichi nuclear disaster in Japan, following the Tōhoku earthquake on 11 March 2011 and manages a global open data network for ionizing radiation and air quality monitoring.

Data.gov is a U.S. government website launched in late May 2009 by the federal chief information officer of the United States, Vivek Kundra. Data.gov aims to improve public access to high value, machine-readable datasets generated by the Executive Branch of the federal government. The site is a repository for federal, state, local, and tribal government information made available to the public.

deletion event in 2025

practice of making data available to others

text definition of the term 'open' in the context of open content and open data

scientific organization