Starting for the 4.4 release, custom prefixes can be added in the administration UI. These prefixes can be used by non-admin users when integrating CSV files (for specifying URIs, for instance)
Registering a prefix (admin-only)¶
You can head to
Creating a custom prefix¶
Simply fill out the desired prefix (ex: wikibase), and namespace: (ex: http://wikiba.se/ontology#). Users will be able to fill out data using the wikibase:XXX format.