Towards Multiple Ontology Merging with CoMerger

To obtain a knowledge graph representing a domain of interest, it is often necessary to combine several, independently developed ontologies. Existing approaches are mostly limited to binary merge and lack scalability. This paper presents the development of an efficient multiple ontologies merging method, CoMerger. For efficient processing, rather than directly merging a large number of ontologies, we group related concepts across ontologies into partitions and merge first within and then across those partitions. Experiments on real-life datasets confirm the feasibility of our approach and demonstrate its superiority over binary strategies. Our implementation is available through a live web portal.