This paper treats the quantification and description of similarities among entities being represented as a network. The proposed representation model, hypernetwork model, allows more specific description of relationships among represented entities than conventional knowledge representation models. Musical instruments performance is represented with hypernetwork model. Detailed description of similarity relationships provided by the hypernetwork model enables the discrimination of various types and degrees of similarity. A method to compare similar relationships is also discussed, which leads to the analogical reasoning, associative search and retrieval.
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