Sub-ontology, as the name implies, is a subset of an ontology tailored for a specific domain. Large-scale ontology data can be optimized by extracting the required sub-ontology. Sub-ontology extraction that reflects the user requirements is one method of addressing the issue. Here, sub-ontology extraction methods are called sub-ontology optimization schemes. In this paper, we develop a visual view for users to adopt sub-ontology extraction methods with a particular aim of providing users a front-end tool to perform a particular sub-ontology extraction. Likewise, we construct a Semantic Grid prototype environment to extract the sub-ontology and conducted preliminary evaluation through illustrations using the UMLS Semantic Network. Functional evaluations provided promising results to pursue further experiments and studies on the problem issue.
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