Technical review on ontology merging

Emergence of semantic web made available and accessible of many ontologies through web. It automatically increases the usage and application of ontologies. A single domain ontology is not sufficient to support the requirements anticipated by a distributed scenarios. More ontologies need to be utilised from other applications. These requirements motivate the integration of similar ontologies. However, the main issue is that there is no unique optimum solution for a merging methods and that merging can be achieved asymmetrically or symmetrically. In this paper, various merging techniques are analysed with its pros and cons. From that, the issues in the existing methods are listed and the possible research directions for future enhancement are discussed. Hope this can open a way to improve merging solutions as per the application requirements.