OpenCorporates is a website

Website

A website, also written as Web site, web site, or simply site, is a collection of related web pages containing images, videos or other digital assets. A website is hosted on at least one web server, accessible via a network such as the Internet or a private local area network through an Internet...

 which shares data on corporate entities

Corporation

A corporation is created under the laws of a state as a separate legal entity that has privileges and liabilities that are distinct from those of its members. There are many different forms of corporations, most of which are used to conduct business. Early corporations were established by charter...

 as open data

Open Data

Open data is the idea that certain data should be freely available to everyone to use and republish as they wish, without restrictions from copyright, patents or other mechanisms of control. The goals of the open data movement are similar to those of other "Open" movements such as open source, open...

 under the share-alike attribution Open Database Licence

Open Database Licence

The Open Database License is a "Share Alike" license agreement intended to allow users to freely share, modify, and use a database while maintaining this same freedom for others....

. It was created by Chris Taggart and Rob McKinnon and launched on 20 December 2010. It has the aims of creating a URL with such data for every corporate entity in the world, importing government data relating to companies and matching it to specific companies.

The site also shows groups of companies which are legally part of the same conglomerate. Basic company information is available as XML

XML

Extensible Markup Language is a set of rules for encoding documents in machine-readable form. It is defined in the XML 1.0 Specification produced by the W3C, and several other related specifications, all gratis open standards....

 or JSON

JSON

JSON , or JavaScript Object Notation, is a lightweight text-based open standard designed for human-readable data interchange. It is derived from the JavaScript scripting language for representing simple data structures and associative arrays, called objects...

.

Recognition

The site was an award winner in the OpenDataChallenge, whose judging panel included web founder Tim Berners-Lee

Tim Berners-Lee

Sir Timothy John "Tim" Berners-Lee, , also known as "TimBL", is a British computer scientist, MIT professor and the inventor of the World Wide Web...

 and Laura Creighton, who said:

This is an incredibly powerful and useful app. It combines information collected by scraping the web with Open Data from government bodies, with a new feature for crowdsourcing. It makes accessing government information about companies trivial. This tool is invaluable for those who want to find out more about what it is that corporations are doing. It is a remarkable step forward for transparency and accountability. I could play with this thing for days.

In launching the competition, Neelie Kroes

Neelie Kroes

Neelie Kroes is a Dutch politician of the People's Party for Freedom and Democracy . She served as a Member of the House of Representatives from 3 August 1971 until 28 December 1977 when she became State Secretary for Transport, Public Works and Water Management from 28 December 1977 until 11...

, Vice-President of the European Commission

European Commission

The European Commission is the executive body of the European Union. The body is responsible for proposing legislation, implementing decisions, upholding the Union's treaties and the general day-to-day running of the Union....

said of the site:

This is the kind of resource the (Digital) Single Market needs and it is encouraging to see that it is being built.