This directory contains mappings between Wikidata and other knowledge organization systems. The data is daily extracted from Wikidata and available as public domain (CC Zero). Information about this list can also be accessed as JSKOS Registry from wikidata-concordances.json.
An API for live querying of mappings between Wikidata and other authority files is provided here.
The list of properties is based on this SPARQL query to include all mapping properties (Wikidata property to identify things) with corresponding KOS registered in BARTOC. Mappings are extracted and converted with the command line tool wdmapper.
Indirect mappings with Wikidata as linking hub can be harvested as well. See CSV file
indirect.csv for current numbers with the authority files
listed above. To actually download an indirect mapping use Wikidata BEACON or wdmapper
wdmapper get P227 P2428 for GND-to-RePEc Short-ID).