[Semantic Web]Types of Semantics

读书笔记,  电脑与网络 Lee 发表于 2006/5/17 14:54:42 　(1) Implicit semantics Implicit semantics is either largelypresent in most resources on the Web or can easily (quickly) be extracted. Hence mining and learning algorithms applied to these resources can be utilized to extract structured knowledge or enrich existing structured formal representations. Since formal semantics intrinsically does not exist, implicit semantics is useful in processing data sets or corpus to obtain or bootstrap semanticsthat can be then represented in formal languages, potentially with human involvement. (2)  Formal semantics Formal semantics in the form of ontologies is relatively scarce, but representation mechanisms with such semantics have definite semantic interpretations that make them more machineprocessable. Representation mechanisms with formal semantics therefore afford applications the luxury of automated reasoning, making the applications more intelligent. (3)Powerful (soft) semantics Powerful (soft) semantics in the form of fuzzy or probabilistic KR mechanisms attempt to overcome the shortcomings of the rigid set-based interpretations associated with currently prevalent representation mechanisms by allowing for representation of degree of membership and degree of certainty. Some of the domain knowledge human experts possess is intrinsically complex, and may require these more expressive representations and associated computational techniques.

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