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- 109 creator aldo-gangemi.
- 109 creator francesco-draicchio.
- 109 creator valentina-presutti.
- 109 type InProceedings.
- 109 label "Knowledge extraction based on Discourse Representation Theory and linguistic frames.".
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- 109 abstract "We have implemented a novel approach for robust ontology design from natural language texts by combining Discourse Representation Theory (DRT), linguistic frame semantics, and ontology design patterns. We show that DRT-based frame detection is feasible by conducting a comparative evaluation of our approach and existing tools. Furthermore, we define a mapping between DRT and RDF/OWL for the production of quality linked data and ontologies, and present FRED, an online tool for converting text into internally well-connected and linked-data-ready ontologies in web-service-acceptable time.".
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- 109 title "Knowledge extraction based on Discourse Representation Theory and linguistic frames.".
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- 11 creator axel-cyrille-ngonga-ngomo.
- 11 creator daniel-gerber.
- 11 type InProceedings.
- 11 label "Extracting Multilingual Natural-Language Patterns for RDF Predicates".
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- 11 abstract "Most knowledge sources on the Data Web were extracted from structured or semi-structured data. Thus, they encompass solely a small fraction of the information available on the document-oriented Web. In this paper, we present BOA, a bootstrapping strategy for extracting RDF from text. The idea behind BOA is to extract natural-language patterns that represent predicates found on the Data Web from unstructured data by using background knowledge from the Data Web. These patterns are used to extract instance knowledge from natural-language text. This knowledge is finally fed back into the Data Web, therewith closing the loop. The approach followed by BOA is quasi independent of the language in which the corpus is written. We demonstrate our approach by applying it to four different corpora and two different languages. We evaluate BOA on these data sets using DBpedia as background knowledge. Our results show that we can extract several thousand new facts in one iteration with very high accuracy. Moreover, we provide the first multilingual repository of natural-language representations of predicates found on the Data Web.".
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- 117 creator kouji-kozaki.
- 117 creator riichiro-mizoguchi.
- 117 creator yoshinobu-kitamura.
- 117 type InProceedings.
- 117 label "A Model of Derived Roles".
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- 117 abstract "Although roles have been discussed by many researchers, there remains some room to investigate to clarify ontological characteristics of them. This paper focuses on roles which are dependent on the future or past event/process, such as candidate, departing passenger, murderer, and product etc. In order to deal with such kinds of roles based on an ontological theory of roles, we introduce a model of derived roles with its temporal model. It could provide a computational model to represent temporal characteristics of roles.".
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- 125 creator chiraz-latiri.
- 125 creator lamia-ben-ghezaiel.
- 125 creator mohamed-ben-ahmed.
- 125 type InProceedings.