Wikidata
Wikidata (.org) is a knowledge base, an effort to store and serve structured data to Wikimedia wikis and to a more limited extent to other parties. Wikidata effort saw the daylight in 2012.
The underlying software is the Wikibase which consists of 2 Mediawiki extensions, the repository extension and the client extension.
Wikibase allows interwiki links to be managed with Wikidata removing much contributor annoyanges, redundancy and error-proneness.
Wikidata is obviously a main source of reference level data once it is technically possible for non-WMF wikis to access the data items.
It can be accessed outside of WMF wikis with with
- Wikidata advice on how to query Wikidata's endpoint using SPARQL.
- mw:Wikidata Toolkit is a way for Java programs to access data in the Wikidata repository.
- SPARQL Endpoint interface to Python
- Wikidata offers its database for download
Main entry point of any Wikidata item is a JSON dictionary, that has this form:
{“labels”: by-language dictionary
“descriptions”: by-language dictionary
“aliases”: by-language dictionary
“claims”: list of property and values
“sitelinks”: by-language dictionary}
Useful information
More info
See also
- Database for a higher level view of what is going on with the databases
- Semantic MediaWiki is system for inputting and querying semantic data within the MediaWiki and it is implemented as extension(s).
- DBpedia the original structured data harvesting effort for the MediaWiki wikis