# Class Order Disorder in Wikidata and First Fixes

arXiv: https://arxiv.org/abs/2411.15550 · HTML: https://mlsanity.com/paper/2411.15550/

## Key facts

- Cited by 1 papers in the map (data through 14 Oct 2026).
- Builds on 2 of its 14 references that are in the map.
- First posted on arXiv 23 Nov 2024.

## Builds on (most cited first, 2 of 2)

- [A Study of the Quality of Wikidata](https://mlsanity.com/paper/2107.00156/) (2021)
- [Ontology Design Facilitating Wikibase Integration -- and a Worked Example for Historical Data](https://mlsanity.com/paper/2205.14032/) (2022)

## Built on by (most cited first, 1 of 1)

- [WiCleanData: Guaranteeing the Type Consistency of Wikidata by Taxonomy Refinement and Constraint Enforcement](https://mlsanity.com/paper/2609.20057/) (2026)

## Abstract (arXiv)

Wikidata has a large ontology with classes at several orders. The Wikidata ontology has long been known to have violations of class order and information related to class order that appears suspect. SPARQL queries were evaluated against Wikidata to determine the prevalence of several kinds of violations and suspect information and the results analyzed. Some changes were manually made to Wikidata to remove some of these results and the queries rerun, showing the effect of the changes. Suggestions are provided on how the problems uncovered might be addressed, either though better tooling or involvement of the Wikidata community.