- Free. The data in Wikidata is published under the Creative Commons Public Domain Dedication 1.0, allowing the reuse of the data in many different scenarios. You can copy, modify, distribute and perform the data, even for commercial purposes, without asking for permission.
- Collaborative. Data is entered and maintained by Wikidata editors, who decide on the rules of content creation and management. Automated bots also enter data into Wikidata.
- Support for Wikimedia wikis. Wikidata assists Wikipedia with more easily maintainable information boxes and links to other languages, thus reducing editing workload while improving quality. Updates in one language are made available to all other languages.
For a person, you can add a property to specify where they were educated, by specifying a value for a school. For buildings, you can assign geographic coordinates properties by specifying longitude and latitude values. Properties can also link to external databases. A property that links an item to an external database, such as an authority control database used by libraries and archives, is called an identifier. Special Sitelinks connect an item to corresponding content on client wikis, such as Wikipedia, Wikibooks or Wikiquote.
All this information can be displayed in any language, even if the data originated in a different language. When accessing these values, client wikis will show the most up-to-date data.
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There are a number of ways to access Wikidata using built-in tools, external tools, or programming interfaces.
- Wikidata Query and Reasonator are some of the popular tools to search for and examine Wikidata items. The tools page has an extensive list of interesting projects to explore.
- Client wikis can access data for their pages using a Lua Scribunto interface. You can retrieve all data independently using the Wikidata API.
The Wikidata tours, designed for new users, are the best place to learn more about Wikidata.
Some links to get started:
- Set your user options, especially the 'Babel' extension, to choose your language preferences
- Help with missing labels and descriptions
- Help with interwiki conflicts and constraint violations
- Improve a random item
Go ahead and start editing. Editing is the best way to learn about the structure and concepts of Wikidata. If you would like to gain understanding of Wikidata's concepts upfront, you may want to have a look at the help pages. If you have questions, please feel free to drop them in the project chat or contact the development team.
Wikidata is an ongoing project that is under active development. More data types as well as extensions will be available in the future. You can find more information about Wikidata and its ongoing development on the Wikidata page on Meta. Subscribe to the Wikidata mailing list to receive up-to-date information about the development and to participate in discussions about the future of the project.