Wikidata is a collaboratively edited knowledge base operated by the Wikimedia Foundation. It is intended to provide a common source of certain types of data which can be used by Wikimedia projects such as Wikipedia. Wikidata functions as a document-oriented database, centred on individual items. Items represent topics, for which basic information is stored that identifies each topic.
Identifier Standards
- Pattern for Local Unique Identifiers
-
Local unique identifiers in Wikidata should match this
regular expression:
^(Q|P|E|L)\d+$ - Example Local Unique Identifiers
-
Q81661651
Resolve
L704278 Resolve
P675 Resolve - Pattern for CURIES
-
Compact URIs (CURIEs) constructed from Wikidata should match
this regular expression:
^wikidata:(Q|P|E|L)\d+$ - Example CURIEs
-
wikidata:Q81661651
wikidata:L704278
wikidata:P675 - Format String for RDF URIs
- http://www.wikidata.org/entity/$1
- Example RDF URI
- http://www.wikidata.org/entity/Q81661651
Contacts
- Contact
-
Denny Vrandečić
0000-0002-9593-2294
vrandezo
- Identifier Space Owner
-
Wikimedia Foundation, San Francisco, California
Mappings to External Registries
Mappings from records in Semantic Farm to external registries comprises the metaregistry. This resource has 7 mappings to external registries with 3 unique external prefixes.
| Registry Name | Registry Metaprefix | External Prefix | Curate |
|---|---|---|---|
BARTOC
|
bartoc |
1940
|
|
| BioContext | biocontext |
WIKIDATA
|
|
| Biolink | biolink.resource |
WIKIDATA
|
|
| Cellosaurus | cellosaurus.resource |
Wikidata
|
|
Identifiers.org namespace
|
miriam |
wikidata
|
|
| N2T | n2t |
wikidata
|
|
|
Wikidata (E)
|
wikidata.entity |
Q2013
|
Providers
A provider turns a local unique identifiers from a resource into a URI. Many providers are also resolvable as URLs (i.e., they can be used in a web browser).
The local unique identifier Q81661651 is used to demonstrate the providers
available for Wikidata. Some providers may use a different example, which is displayed in the table below.
A guide for curating additional providers can be found
here.
| Provider Name | Provider Code | URI |
|---|---|---|
| Wikidata | wikidata |
http://www.wikidata.org/entity/Q81661651 |
| Wikidata (RDF) | rdf |
http://www.wikidata.org/entity/Q81661651 |
| Bioregistry | bioregistry |
https://bioregistry.io/wikidata:Q81661651 |
| Identifiers.org namespace | miriam |
https://identifiers.org/wikidata:Q81661651 |
| Name-to-Thing | n2t |
https://n2t.net/wikidata:Q81661651 |
Extra Providers
Additional providers curated in the Semantic Farm are listed here. These are typically inherited from Identifiers.org or Prefix Commons, and need extra curation.
| Provider Name | Provider Code | URL |
|---|---|---|
| Scholia | scholia |
https://scholia.toolforge.org/Q81661651 |