Computer Software

Introduction to the Special Issue on Semantic Web and Computer Science

Takehiro TOKUDA

2005 Volume 22 Issue 4 Pages 4_1
Published: October 26, 2005
Released on J-STAGE: September 09, 2008

DOIhttps://doi.org/10.11309/jssst.22.4_1

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Expectation and Layer Model of Semantic Web

Tatsuya HAGINO

2005 Volume 22 Issue 4 Pages 4_2-4_5
Published: October 26, 2005
Released on J-STAGE: September 09, 2008

DOIhttps://doi.org/10.11309/jssst.22.4_2

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In this paper, we will present the outline of Semantic Web and its technical layers. The current Web consists mainly of documents which are meant be read by people, whereas the Semantic Web aims to build a Web space of meanings (or semantic information). By handling semantic information, Web data can be processable by machines, so that various currently time consuming operations can be automated. In this paper, we will outline the world which Semantic Web tries to build, and we will also present the building component technologies of Semantic Web.

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Introduction to RDF and RDF Schema

Hiroshi TSUDA

2005 Volume 22 Issue 4 Pages 4_6-4_11
Published: October 26, 2005
Released on J-STAGE: September 09, 2008

DOIhttps://doi.org/10.11309/jssst.22.4_6

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RDF (Resource Description Framework) and RDF Schema are fundamental standardizations to describe and define metadata in the Semantic Web. This paper gives an outline of RDF, RDF Schema and their applications.

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OWL Web Ontology Description Language: Summary and Expressive Power

Takahira YAMAGUCHI, Naoki FUKUTA, Seiji KOIDE

2005 Volume 22 Issue 4 Pages 4_12-4_18
Published: October 26, 2005
Released on J-STAGE: September 09, 2008

DOIhttps://doi.org/10.11309/jssst.22.4_12

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Ontology has been used as a primitive of knowledge base construction, and now it is the backbone of the Semantic Web. It incorporates extensibility and distributed manageability that are main features of the Web. In this paper, we summarize the features of ontology description language OWL. Then we present a brief overview of its expressive power in a context of extending Web service technology.

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Web of Trust, A Survey

Hideaki TAKEDA

2005 Volume 22 Issue 4 Pages 4_19-4_25
Published: October 26, 2005
Released on J-STAGE: September 09, 2008

DOIhttps://doi.org/10.11309/jssst.22.4_19

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Trust on Web is one of most important issues to realize Semantic Web, because Semantic Web enables intelligent processing and automatic processing on all Web resources, even though they varies in trust. In this article, I overview technologies for realizing trust on Web. First I introduce trust from socio-psychological view. Then I classify the current trust technologies according to the following aspects: types of information that trust is based on, its coverage, its acquisition method, and its computation model. Finally, I briefly explain named graph as metadata format that trust may be based on.

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OWL Reasoning and its Complexity

Ken KANEIWA

2005 Volume 22 Issue 4 Pages 4_26-4_34
Published: October 26, 2005
Released on J-STAGE: September 09, 2008

DOIhttps://doi.org/10.11309/jssst.22.4_26

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This survey paper describes OWL reasoning and its complexity. The OWL Web Ontology Language has three sublanguages (OWL Full/OWL DL/OWL Lite). In particular, OWL DL is based on the theoretical foundations of Description Logic (DL). We indicate that logical reasoning on ontologies and decidability are guaranteed by the expressive power of the OWL DL.

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Semantics Web from the View Point of Data-model Theory

Hiroshi ARISAWA

2005 Volume 22 Issue 4 Pages 4_35-4_39
Published: October 26, 2005
Released on J-STAGE: September 09, 2008

DOIhttps://doi.org/10.11309/jssst.22.4_35

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This paper discusses the semantic description in a database using meta-data from the viewpoint of datamodel and its theory. Especially, we discuss about expressive power in “structured data” and “Cartesian Product” which are difficult to treat in the Sematic Web framework.

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SemanticWeb Development Methodologies by Object-Oriented Approaches

Yasuyuki TAHARA, Shinichi HONIDEN

2005 Volume 22 Issue 4 Pages 4_40-4_45
Published: October 26, 2005
Released on J-STAGE: September 09, 2008

DOIhttps://doi.org/10.11309/jssst.22.4_40

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This paper explains applications of object-oriented development methodologies to semantic Web, especially, ontology development using UML, an object-oriented modeling language. Concretely, this paper surveys techniques to describe ontologies in UML or its extensions and transform the descriptions to those written in DAML or OWL. This paper also mentions the issues of semantic Web development methodologies with object-orientation to be tackled in the future.

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A View of Semantic Web from Knowledge Representation Research

Hideyuki NAKASHIMA, Noriaki IZUMI

2005 Volume 22 Issue 4 Pages 4_46-4_54
Published: October 26, 2005
Released on J-STAGE: September 09, 2008

DOIhttps://doi.org/10.11309/jssst.22.4_46

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One of important research issues of Semantic Web is formalization of relationships among various semantic representation schemes. This field is called “ontology” although it can be regarded as a part of more traditional knowledge representation research. In fact, it is sometimes observed that problems discussed in knowledge representation community in 1960's and 1970's reappear in ontology community these days. Study of history is necessary not to re-invent wheels. For this purpose in mind, this article overviews the history of knowledge representation research, which includes research on reasoning as its essential part.

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Recent Trends on Semantic Web Tools

Naohiko URAMOTO

2005 Volume 22 Issue 4 Pages 4_55-4_60
Published: October 26, 2005
Released on J-STAGE: September 09, 2008

DOIhttps://doi.org/10.11309/jssst.22.4_55

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Semantic Web is becoming realistic by the standardization and dissemination of metadata (RDF) and ontology (OWL) as next generation Web infrastructure. As XML parsers played important role for dissemination of XML, development of Semantic Web tools for RDF and OWL is very important. This paper categorizes Semantic Web tools and introduces them according to the categorization.

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Pessimistic Views and Optimistic Views of the Semantic Web

Takehiro TOKUDA

2005 Volume 22 Issue 4 Pages 4_61-4_64
Published: October 26, 2005
Released on J-STAGE: September 09, 2008

DOIhttps://doi.org/10.11309/jssst.22.4_61

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We present summaries of some of computer scientists' pessimistic views and optimistic views of the Semantic Web project. We also present some of the basic references for readers to judge those views by themselves.

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Making the Invisible More Visible—Children, Powerful Ideas, and Technologies: Kyoto Prize Workshop Laureate Lecture

Alan Curtis KAY

2005 Volume 22 Issue 4 Pages 4_65-4_83
Published: October 26, 2005
Released on J-STAGE: September 09, 2008

DOIhttps://doi.org/10.11309/jssst.22.4_65

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SPA 2005 Report

Yoshihiro OYAMA, Yohei IWASAKI, Mizuki OKA, Shunsuke SAITO, Masato SAI ...

2005 Volume 22 Issue 4 Pages 4_84-4_91
Published: October 26, 2005
Released on J-STAGE: September 09, 2008

DOIhttps://doi.org/10.11309/jssst.22.4_84

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