Example-based frame mapping applied to information agents for distributed information sources
✍ Scribed by Fumiaki Itoh; Takaya Ueda; Yuji Ikeda
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 259 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0882-1666
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✦ Synopsis
When developing information agents used for collecting and integrating information from distributed information sources, one must deal with different ontologies depending on the information source. The authors introduced Example-Based Frame Mapping (EBFM) that automatically defines correspondence of slots expressing the same attributes in the frame format, which is extensively used as the format for providing structured information. It is a method for automatic integration of different ontologies at the vocabulary level. In EBFM, conceptually corresponding slots are obtained using expression examples of common objects in different information sources. This involves identifying expression examples of the same objects within different information frame formats, and assigning correspondence on the basis of similarity of the slot values. To prevent assigning correspondence to different entities, the slots correspondence relationships are derived after a hypothesis is generated using such clues as uniqueness, which is computed from the information theory, and usage within the same class. The authors have manually extracted information in the frame format present on the WWW, and evaluated this method based on the extracted data. In the cases when common examples appeared, comparison with the results of manually assigned slot correspondences demonstrated accuracy of 99% or better, with a recall rate of 60% or higher.