What is the difference between Wikidata and DBpedia?
You can go to a high profile example to see the properties used on their item page. e.g. RMS Titanic if you are interested in properties for ships. Alternatively, you can use the PropBrowse tool and the List of Properties page to check up on properties. Finally, if you think the way a concept is modelled is wrong then feel free to discuss on the Talk pages e.g. WikiProject Ships if you are wanting to discuss shipping data modelling.
How do you propose NEW properties be created?
- To create a new predicate (“property” in Wikidata), you have to add a request here – https://www.wikidata.org/wiki/Wikidata:Property_proposal – select the type of property from the list of options (e.g “Authority control” for adding an ID property). Once on one of the category pages, there’s a box with button just after the contents).
- Once proposed, other community members will either support or oppose, and some questions may be asked/discussed. After around 2 weeks to a month, if there’s been no unresolved objections then the property will be created by an admin.
- The notability of the data is still best discussed initially by posting a message into Project Chat – notability of a proposed property is also discussed on the property proposal page
What is the schema for Wikidata?
- The hierarchy of Wikidata is being created by the community (using “instance of” and “subclass of” properties to create a tree of “what things are”). It’s generally not very consistent at the moment, and is not fixed to any existing method of classifying things.
- There are tools for examining the class tree though – e.g. https://tools.wmflabs.org/sqid/#/ and https://angryloki.github.io/wikidata-graph-builder/?property=P279&item=Q35120&limit=2&mode=reverse
Links and Further reading.
- .https://www.wikidata.org/wiki/Property:P2966 – National Library of Wales ID for collection items.
- .https://tools.wmflabs.org/reasonator/ – Wikidata made ‘pretty’
- https://tools.wmflabs.org/reasonator/?q=Q42 – Reasonator page for Douglas Adams (Q42) by way of example.
- https://www.mediawiki.org/wiki/Extension:ArticlePlaceholder – another way of placeholding articles using structured data from wikidata to populate information in the meantime until an article can be created.
- Wikidata: Current trends and priorities (May 2017 presentation with current statistics)
- Wikidata video presentations on Media Hopper.
- #wikidata on chat.freenode.net
- Wikidata – The New Rosetta Stone (article).
- Google closes Freebase (article).
- Google’s sketchy attempt to control the world’s knowledge (article).
- api @ wikidata.org/w/api.php
- sandbox @ wikidata.org/wiki/Special:ApiSandbox
- The Wikidata Game: https://tools.wmflabs.org/wikidata-game/distributed/
- Wikibase API Library: github.com/addwiki/wikibase-api
- SPARQL abstraction: github.com/Benestar/asparagus
- Wiki bot Framework: mediawiki.org/wiki/Manual:Pywikibot/Wikidata
- C# .NET
- Wikibase API Library: github.com/Benestar/wikibase.net