LogMap results for OAEI 2011

We present the results obtained by the ontology matching system LogMap within the OAEI 2011 campaign. This is the first participation of LogMap in the campaign, and the results have so far been quite promising. 1 Presentation of the System The LogMap1 project started in January 2011 with the objective of developing a scalable and logic-based ontology matching system. Such system should be able to deal efficiently with large-scale ontologies; furthermore, it should exploit logic-based reasoning and diagnosis techniques to compute output mappings that do not lead to logical inconsistencies when integrated with the input ontologies [7]. Although the development of LogMap is relatively recent, the authors’ experience in the field of ontology integration dates back to 2008 [9, 11]. 1.1 Motivation and Problem Statement Despite the impressive state of the art, large-scale biomedical ontologies still pose serious challenges to existing ontology matching tools [15, 6]. Insufficient scalability. Although existing matching tools can efficiently deal with moderately sized ontologies (e.g. those in the OAEI Anatomy track), large-scale ontologies such as FMA, SNOMED CT and NCI are still beyond their reach. Logical inconsistencies. OWL ontologies have well-defined semantics based on firstorder logic, and mappings are commonly represented as OWL class axioms. Many existing tools, however, disregard the semantics of the input ontologies; thus, they are unable to detect and repair inconsistencies that logically follow from the union of the input ontologies and the computed mappings. Although there is a growing interesting in applying reasoning techniques to ontology matching, reasoning is known to severely aggravate the scalability problem. 1.2 Technical Approach LogMap is a highly scalable ontology matching system with ‘built-in’ reasoning and diagnosis capabilities, which aims at addressing the aforementioned challenges. We next present a brief overview of LogMap and refer the reader to [7] for a comprehensive description. The main steps performed by LogMap are shown in Figure 1. 1 http://www.cs.ox.ac.uk/isg/projects/LogMap/