Wikidata is a collaborative knowledge graph which is central to many academic and industry IT projects. Its
users are responsible for maintaining the schema that organises this knowledge into classes, properties, and
attributes, which together form the Wikidata ‘ontology’. In this paper, we study the relationship between
different Wikidata user roles and the quality of the Wikidata ontology. pdf 
A consequence of the informal, collaborative nature of Wikidata is that its ontology may change quickly, depending on edits on Properties. An application looking up information in Wikidata via an API would receive very different results at different points in time, as these results very much depend on the ontological structure of the knowledge graph. While previous studies have started investigating how users edit the ontology, none of them has yet looked at editing activities over time, which is one of the aims of our paper.
We identified two activity patterns: contributors, i.e. users with lower number of edits and less engaged in community discussions, and leaders, who are more active in all of the features considered. Only a minority of users presents a leader activity pattern at any time during their interaction with the platform.
Finally, whereas the activity of leaders seems to influence positively the depth of the ontology, no relation could be proven between any editor category and variables concerning the breadth of the ontology.
# See also