Search (11 results, page 1 of 1)

0.0060758926 = product of:
  0.018227678 = sum of:
    0.01031217 = product of:
      0.02062434 = sum of:
        0.02062434 = weight(_text_:web in 106) [ClassicSimilarity], result of:
          0.02062434 = score(doc=106,freq=2.0), product of:
            0.11439841 = queryWeight, product of:
              3.2635105 = idf(docFreq=4597, maxDocs=44218)
              0.03505379 = queryNorm
            0.18028519 = fieldWeight in 106, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.2635105 = idf(docFreq=4597, maxDocs=44218)
              0.0390625 = fieldNorm(doc=106)
      0.5 = coord(1/2)
    0.007915508 = product of:
      0.023746524 = sum of:
        0.023746524 = weight(_text_:22 in 106) [ClassicSimilarity], result of:
          0.023746524 = score(doc=106,freq=2.0), product of:
            0.1227524 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.03505379 = queryNorm
            0.19345059 = fieldWeight in 106, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0390625 = fieldNorm(doc=106)
      0.33333334 = coord(1/3)
  0.33333334 = coord(2/6)

Abstract

Purpose The purpose of this paper is to identify the concepts, component parts and relationships between vocabularies, linked data and knowledge graphs (KGs) from the perspectives of data and knowledge transitions. Design/methodology/approach This paper uses conceptual analysis methods. This study focuses on distinguishing concepts and analyzing composition and intercorrelations to explore data and knowledge transitions. Findings Vocabularies are the cornerstone for accurately building understanding of the meaning of data. Vocabularies provide for a data-sharing model and play an important role in supporting the semantic expression of linked data and defining the schema layer; they are also used for entity recognition, alignment and linkage for KGs. KGs, which consist of a schema layer and a data layer, are presented as cubes that organically combine vocabularies, linked data and big data. Originality/value This paper first describes the composition of vocabularies, linked data and KGs. More importantly, this paper innovatively analyzes and summarizes the interrelatedness of these factors, which comes from frequent interactions between data and knowledge. The three factors empower each other and can ultimately empower the Semantic Web.

Date

22. 1.2021 14:24:32

0.004167614 = product of:
  0.025005683 = sum of:
    0.025005683 = product of:
      0.050011367 = sum of:
        0.050011367 = weight(_text_:web in 52) [ClassicSimilarity], result of:
          0.050011367 = score(doc=52,freq=6.0), product of:
            0.11439841 = queryWeight, product of:
              3.2635105 = idf(docFreq=4597, maxDocs=44218)
              0.03505379 = queryNorm
            0.43716836 = fieldWeight in 52, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              3.2635105 = idf(docFreq=4597, maxDocs=44218)
              0.0546875 = fieldNorm(doc=52)
      0.5 = coord(1/2)
  0.16666667 = coord(1/6)

Abstract

While thousands of ontologies exist on the web, a unified sys-tem for handling online ontologies - in particular with respect to discov-ery, versioning, access, quality-control, mappings - has not yet surfacedand users of ontologies struggle with many challenges. In this paper, wepresent an online ontology interface and augmented archive called DB-pedia Archivo, that discovers, crawls, versions and archives ontologies onthe DBpedia Databus. Based on this versioned crawl, different features,quality measures and, if possible, fixes are deployed to handle and sta-bilize the changes in the found ontologies at web-scale. A comparison toexisting approaches and ontology repositories is given.

0.002916722 = product of:
  0.017500332 = sum of:
    0.017500332 = product of:
      0.035000663 = sum of:
        0.035000663 = weight(_text_:web in 5993) [ClassicSimilarity], result of:
          0.035000663 = score(doc=5993,freq=4.0), product of:
            0.11439841 = queryWeight, product of:
              3.2635105 = idf(docFreq=4597, maxDocs=44218)
              0.03505379 = queryNorm
            0.3059541 = fieldWeight in 5993, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.2635105 = idf(docFreq=4597, maxDocs=44218)
              0.046875 = fieldNorm(doc=5993)
      0.5 = coord(1/2)
  0.16666667 = coord(1/6)

Abstract

The lack of standardization in the production, organization and dissemination of information in documentation centers and institutions alike, as a result from the digitization of collections and their availability on the internet has called for integration efforts. The sheer availability of multimedia content has fostered the development of many distinct and, most of the time, independent metadata standards for its description. This study aims at presenting and comparing the existing standards of metadata, vocabularies and ontologies for multimedia annotation and also tries to offer a synthetic overview of its main strengths and weaknesses, aiding efforts for semantic integration and enhancing the findability of available multimedia resources on the web. We also aim at unveiling the characteristics that could, should and are perhaps not being highlighted in the characterization of multimedia resources.

0.002749912 = product of:
  0.01649947 = sum of:
    0.01649947 = product of:
      0.03299894 = sum of:
        0.03299894 = weight(_text_:web in 1030) [ClassicSimilarity], result of:
          0.03299894 = score(doc=1030,freq=8.0), product of:
            0.11439841 = queryWeight, product of:
              3.2635105 = idf(docFreq=4597, maxDocs=44218)
              0.03505379 = queryNorm
            0.2884563 = fieldWeight in 1030, product of:
              2.828427 = tf(freq=8.0), with freq of:
                8.0 = termFreq=8.0
              3.2635105 = idf(docFreq=4597, maxDocs=44218)
              0.03125 = fieldNorm(doc=1030)
      0.5 = coord(1/2)
  0.16666667 = coord(1/6)

Abstract

In the last few years, the size of Linked Open Data (LOD) describing artworks, in general or domain-specific Knowledge Graphs (KGs), is gradually increasing. This provides (art-)historians and Cultural Heritage professionals with a wealth of information to explore. Specifically, structured data about iconographical and iconological (icon) aspects, i.e. information about the subjects, concepts and meanings of artworks, are extremely valuable for the state-of-the-art of computational tools, e.g. content recognition through computer vision. Nevertheless, a data quality evaluation for art domains, fundamental for data reuse, is still missing. The purpose of this study is filling this gap with an overview of art-historical data quality in current KGs with a focus on the icon aspects. Design/methodology/approach This study's analyses are based on established KG evaluation methodologies, adapted to the domain by addressing requirements from art historians' theories. The authors first select several KGs according to Semantic Web principles. Then, the authors evaluate (1) their structures' suitability to describe icon information through quantitative and qualitative assessment and (2) their content, qualitatively assessed in terms of correctness and completeness. Findings This study's results reveal several issues on the current expression of icon information in KGs. The content evaluation shows that these domain-specific statements are generally correct but often not complete. The incompleteness is confirmed by the structure evaluation, which highlights the unsuitability of the KG schemas to describe icon information with the required granularity. Originality/value The main contribution of this work is an overview of the actual landscape of the icon information expressed in LOD. Therefore, it is valuable to cultural institutions by providing them a first domain-specific data quality evaluation. Since this study's results suggest that the selected domain information is underrepresented in Semantic Web datasets, the authors highlight the need for the creation and fostering of such information to provide a more thorough art-historical dimension to LOD.

Theme

Semantic Web

0.0024306017 = product of:
  0.01458361 = sum of:
    0.01458361 = product of:
      0.02916722 = sum of:
        0.02916722 = weight(_text_:web in 5881) [ClassicSimilarity], result of:
          0.02916722 = score(doc=5881,freq=4.0), product of:
            0.11439841 = queryWeight, product of:
              3.2635105 = idf(docFreq=4597, maxDocs=44218)
              0.03505379 = queryNorm
            0.25496176 = fieldWeight in 5881, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.2635105 = idf(docFreq=4597, maxDocs=44218)
              0.0390625 = fieldNorm(doc=5881)
      0.5 = coord(1/2)
  0.16666667 = coord(1/6)

Abstract

Traditionally connected to philosophy, the term ontology is increasingly related to information systems areas. Some researchers consider the approaches of the two disciplinary contexts to be completely different. Others consider that, although different, they should talk to each other, as both seek to answer similar questions. With the extensive literature on this topic, we intend to contribute to the understanding of the use of the term ontology in current research and which references support this use. An exploratory study was developed with a mixed methodology and a sample collected from the Web of Science of articles publishe in 2018. The results show the current prevalence of computer science in studies related to ontology and also of Gruber's view suggesting ontology as kind of conceptualization, a dominant view in that field. Some researchers, particularly in the field of biomedicine, do not adhere to this dominant view but to another one that seems closer to ontological study in the philosophical context. The term ontology, in the context of information systems, appears to be consolidating with a meaning different from the original, presenting traces of the process of "metaphorization" in the transfer of the term between the two fields of study.

0.0024306017 = product of:
  0.01458361 = sum of:
    0.01458361 = product of:
      0.02916722 = sum of:
        0.02916722 = weight(_text_:web in 105) [ClassicSimilarity], result of:
          0.02916722 = score(doc=105,freq=4.0), product of:
            0.11439841 = queryWeight, product of:
              3.2635105 = idf(docFreq=4597, maxDocs=44218)
              0.03505379 = queryNorm
            0.25496176 = fieldWeight in 105, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.2635105 = idf(docFreq=4597, maxDocs=44218)
              0.0390625 = fieldNorm(doc=105)
      0.5 = coord(1/2)
  0.16666667 = coord(1/6)

Abstract

The purpose of this paper is to provide a critical analysis from an ethical perspective of how the concept of indigenous wayfinding and voyaging is mapped in knowledge representation, organization and discovery systems. Design/methodology/approach In this study, the Dewey Decimal Classification, the Library of Congress Subject Headings, the Library of Congress Classifications systems and the Web of Science citation database were methodically examined to determine how these systems represent and facilitate the discovery of indigenous knowledge of wayfinding and voyaging. Findings The analysis revealed that there was no dedicated representation of the indigenous practices of wayfinding and voyaging in the major knowledge representation, organization and discovery systems. By scattering indigenous practice across various, often very broad and unrelated classes, coherence in the record is disrupted, resulting in misrepresentation of these indigenous concepts. Originality/value This study contributes to a relatively limited research literature on representation and organization of indigenous knowledge of wayfinding and voyaging. This study calls to foster a better understanding and appreciation for the rich knowledge that indigenous cultures provide for an enlightened society.

Object

Web of Science

0.002406173 = product of:
  0.0144370375 = sum of:
    0.0144370375 = product of:
      0.028874075 = sum of:
        0.028874075 = weight(_text_:web in 439) [ClassicSimilarity], result of:
          0.028874075 = score(doc=439,freq=2.0), product of:
            0.11439841 = queryWeight, product of:
              3.2635105 = idf(docFreq=4597, maxDocs=44218)
              0.03505379 = queryNorm
            0.25239927 = fieldWeight in 439, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.2635105 = idf(docFreq=4597, maxDocs=44218)
              0.0546875 = fieldNorm(doc=439)
      0.5 = coord(1/2)
  0.16666667 = coord(1/6)

Abstract

This contribution presents the principal features of ontologies, drawing special attention to the comparison between ontologies and the different kinds of know­ledge organization systems (KOS). The focus is on the semantic richness exhibited by ontologies, which allows the creation of a great number of relationships between terms. That establishes ontologies as the most evolved type of KOS. The concepts of "conceptualization" and "formalization" and the key components of ontologies are described and discussed, along with upper and domain ontologies and special typologies, such as bibliographical ontologies and biomedical ontologies. The use of ontologies in the digital libraries environment, where they have replaced thesauri for query expansion in searching, and the role they are playing in the Semantic Web, especially for semantic interoperability, are sketched.

0.002110802 = product of:
  0.012664813 = sum of:
    0.012664813 = product of:
      0.037994437 = sum of:
        0.037994437 = weight(_text_:22 in 318) [ClassicSimilarity], result of:
          0.037994437 = score(doc=318,freq=2.0), product of:
            0.1227524 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.03505379 = queryNorm
            0.30952093 = fieldWeight in 318, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0625 = fieldNorm(doc=318)
      0.33333334 = coord(1/3)
  0.16666667 = coord(1/6)

Date

22. 5.2021 12:43:05

0.001718695 = product of:
  0.01031217 = sum of:
    0.01031217 = product of:
      0.02062434 = sum of:
        0.02062434 = weight(_text_:web in 5758) [ClassicSimilarity], result of:
          0.02062434 = score(doc=5758,freq=2.0), product of:
            0.11439841 = queryWeight, product of:
              3.2635105 = idf(docFreq=4597, maxDocs=44218)
              0.03505379 = queryNorm
            0.18028519 = fieldWeight in 5758, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.2635105 = idf(docFreq=4597, maxDocs=44218)
              0.0390625 = fieldNorm(doc=5758)
      0.5 = coord(1/2)
  0.16666667 = coord(1/6)

Abstract

The article identifies the core literature available on flood ontologies and presents a review on these ontologies from various perspectives like its purpose, type, design methodologies, ontologies (re)used, and also their focus on specific flood disaster phases. The study was conducted in two stages: i) literature identification, where the systematic literature review methodology was employed; and, ii) ontological review, where the parametric approach was applied. The study resulted in a set of fourteen papers discussing the flood ontology (FO). The ontological review revealed that most of the flood ontologies were task ontologies, formal, modular, and used web ontology language (OWL) for their representation. The most (re)used ontologies were SWEET, SSN, Time, and Space. METHONTOLOGY was the preferred design methodology, and for evaluation, application-based or data-based approaches were preferred. The majority of the ontologies were built around the response phase of the disaster. The unavailability of the full ontologies somewhat restricted the current study as the structural ontology metrics are missing. But the scientific community, the developers, of flood disaster management systems can refer to this work for their research to see what is available in the literature on flood ontology and the other major domains essential in building the FO.

0.0013312267 = product of:
  0.00798736 = sum of:
    0.00798736 = product of:
      0.023962079 = sum of:
        0.023962079 = weight(_text_:29 in 103) [ClassicSimilarity], result of:
          0.023962079 = score(doc=103,freq=2.0), product of:
            0.12330827 = queryWeight, product of:
              3.5176873 = idf(docFreq=3565, maxDocs=44218)
              0.03505379 = queryNorm
            0.19432661 = fieldWeight in 103, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5176873 = idf(docFreq=3565, maxDocs=44218)
              0.0390625 = fieldNorm(doc=103)
      0.33333334 = coord(1/3)
  0.16666667 = coord(1/6)

Abstract

There have been many attempts at classifying the semantic modification relations (R) of N + N compounds but this work has not led to the acceptance of a definitive scheme, so that devising a reusable classification is a worthwhile aim. The scope of this undertaking is extended to other binominal lexemes, i.e. units that contain two thing-morphemes without explicitly stating R, like prepositional units, N + relational adjective units, etc. The 25-relation taxonomy of Bourque (2014) was tested against over 15,000 binominal lexemes from 106 languages and extended to a 29-relation scheme ("Bourque2") through the introduction of two new reversible relations. Bourque2 is then mapped onto Hatcher's (1960) four-relation scheme (extended by the addition of a fifth relation, similarity , as "Hatcher2"). This results in a two-tier system usable at different degrees of granularities. On account of its semantic proximity to compounding, metonymy is then taken into account, following Janda's (2011) suggestion that it plays a role in word formation; Peirsman and Geeraerts' (2006) inventory of 23 metonymic patterns is mapped onto Bourque2, confirming the identity of metonymic and binominal modification relations. Finally, Blank's (2003) and Koch's (2001) work on lexical semantics justifies the addition to the scheme of a third, superordinate level which comprises the three Aristotelean principles of similarity, contiguity and contrast.

0.001055401 = product of:
  0.0063324063 = sum of:
    0.0063324063 = product of:
      0.018997218 = sum of:
        0.018997218 = weight(_text_:22 in 179) [ClassicSimilarity], result of:
          0.018997218 = score(doc=179,freq=2.0), product of:
            0.1227524 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.03505379 = queryNorm
            0.15476047 = fieldWeight in 179, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.03125 = fieldNorm(doc=179)
      0.33333334 = coord(1/3)
  0.16666667 = coord(1/6)

Date

20. 1.2015 18:30:22