Search (11 results, page 1 of 1)

0.073479846 = product of:
  0.09797312 = sum of:
    0.015353453 = weight(_text_:information in 2731) [ClassicSimilarity], result of:
      0.015353453 = score(doc=2731,freq=10.0), product of:
        0.08850355 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.050415643 = queryNorm
        0.1734784 = fieldWeight in 2731, product of:
          3.1622777 = tf(freq=10.0), with freq of:
            10.0 = termFreq=10.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.03125 = fieldNorm(doc=2731)
    0.06259242 = weight(_text_:standards in 2731) [ClassicSimilarity], result of:
      0.06259242 = score(doc=2731,freq=4.0), product of:
        0.22470023 = queryWeight, product of:
          4.4569545 = idf(docFreq=1393, maxDocs=44218)
          0.050415643 = queryNorm
        0.27855965 = fieldWeight in 2731, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          4.4569545 = idf(docFreq=1393, maxDocs=44218)
          0.03125 = fieldNorm(doc=2731)
    0.020027246 = product of:
      0.040054493 = sum of:
        0.040054493 = weight(_text_:organization in 2731) [ClassicSimilarity], result of:
          0.040054493 = score(doc=2731,freq=4.0), product of:
            0.17974974 = queryWeight, product of:
              3.5653565 = idf(docFreq=3399, maxDocs=44218)
              0.050415643 = queryNorm
            0.22283478 = fieldWeight in 2731, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.5653565 = idf(docFreq=3399, maxDocs=44218)
              0.03125 = fieldNorm(doc=2731)
      0.5 = coord(1/2)
  0.75 = coord(3/4)

Abstract

We propose an extension of a mediator architecture. This extension is oriented to ontology-driven data integration. In our architecture ontologies are not managed by an extemal component or service, but are integrated in the mediation layer. This approach implies rethinking the mediator design, but at the same time provides advantages from a database perspective. Some of these advantages include the application of optimization and evaluation techniques that use and combine information from all abstraction levels (physical schema, logical schema and semantic information defined by ontology). 1. Introduction Although the Web is probably the richest information repository in human history, users cannot specify what they want from it. Two major problems that arise in current search engines (Heflin, 2001) are: a) polysemy, when the same word is used with different meanings; b) synonymy, when two different words have the same meaning. Polysemy causes irrelevant information retrieval. On the other hand, synonymy produces lost of useful documents. The lack of a capability to understand the context of the words and the relationships among required terms, explains many of the lost and false results produced by search engines. The Semantic Web will bring structure to the meaningful content of Web pages, giving semantic relationships among terms and possibly avoiding the previous problems. Various proposals have appeared for meta-data representation and communication standards, and other services and tools that may eventually merge into the global Semantic Web (Berners-lee, 2001). Hopefully, in the next few years we will see the universal adoption of open standards for representation and sharing of meta-information. In this environment, software agents roaming from page to page can readily carry out sophisticated tasks for users (Berners-Lee, 2001). In this context, ontologies can be seen as metadata that represent semantic of data; providing a knowledge domain standard vocabulary, like DTDs and XML Schema do. If its pages were so structured, the Web could be seen as a heterogeneous collection of autonomous databases. This suggests that techniques developed in the Database area could be useful. Database research mainly deals with efficient storage and retrieval and with powerful query languages.

Series

Advances in knowledge organization; vol.8

Source

Challenges in knowledge representation and organization for the 21st century: Integration of knowledge across boundaries. Proceedings of the 7th ISKO International Conference Granada, Spain, July 10-13, 2002. Ed.: M. López-Huertas

0.06326494 = product of:
  0.12652989 = sum of:
    0.01699316 = weight(_text_:information in 4870) [ClassicSimilarity], result of:
      0.01699316 = score(doc=4870,freq=4.0), product of:
        0.08850355 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.050415643 = queryNorm
        0.1920054 = fieldWeight in 4870, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0546875 = fieldNorm(doc=4870)
    0.10953673 = weight(_text_:standards in 4870) [ClassicSimilarity], result of:
      0.10953673 = score(doc=4870,freq=4.0), product of:
        0.22470023 = queryWeight, product of:
          4.4569545 = idf(docFreq=1393, maxDocs=44218)
          0.050415643 = queryNorm
        0.4874794 = fieldWeight in 4870, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          4.4569545 = idf(docFreq=1393, maxDocs=44218)
          0.0546875 = fieldNorm(doc=4870)
  0.5 = coord(2/4)

Abstract

CORC is an OCLC project that id developing tools and systems to enable libraries to provide enhanced access to Internet resources. By adapting and extending library techniques and procedures, we are developing a self-supporting system capable of describing a large and useful subset of the Web. CORC is more a system for hosting and supporting subject gateways than a gateway itself and relies on large-scale cooperation among libraries to maintain a centralized database. By supporting emerging metadata standards such as Dublin Core and other standards such as Unicode and RDF, CORC broadens the range of libraries and librarians able to participate. Current plans are for OCLC as a full service in July 2000

Source

Online information review. 24(2000) no.1, S.49-53

Theme

Information Gateway

0.006785332 = product of:
  0.027141329 = sum of:
    0.027141329 = weight(_text_:information in 2093) [ClassicSimilarity], result of:
      0.027141329 = score(doc=2093,freq=20.0), product of:
        0.08850355 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.050415643 = queryNorm
        0.30666938 = fieldWeight in 2093, product of:
          4.472136 = tf(freq=20.0), with freq of:
            20.0 = termFreq=20.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0390625 = fieldNorm(doc=2093)
  0.25 = coord(1/4)

Abstract

This paper deals with the problem of modeling Web information resources using expert knowledge and personalized user information for improved Web searching capabilities. We propose a "Web information space" model, which is composed of Web-based information resources (HTML/XML [Hypertext Markup Language/Extensible Markup Language] documents an the Web), expert advice repositories (domain-expert-specified metadata for information resources), and personalized information about users (captured as user profiles that indicate users' preferences about experts as well as users' knowledge about topics). Expert advice, the heart of the Web information space model, is specified using topics and relationships among topics (called metalinks), along the lines of the recently proposed topic maps. Topics and metalinks constitute metadata that describe the contents of the underlying HTML/XML Web resources. The metadata specification process is semiautomated, and it exploits XML DTDs (Document Type Definition) to allow domain-expert guided mapping of DTD elements to topics and metalinks. The expert advice is stored in an object-relational database management system (DBMS). To demonstrate the practicality and usability of the proposed Web information space model, we created a prototype expert advice repository of more than one million topics/metalinks for DBLP (Database and Logic Programming) Bibliography data set. We also present a query interface that provides sophisticated querying fa cilities for DBLP Bibliography resources using the expert advice repository.

Source

Journal of the American Society for Information Science and technology. 55(2004) no.2, S.97-110

0.0056770155 = product of:
  0.022708062 = sum of:
    0.022708062 = weight(_text_:information in 824) [ClassicSimilarity], result of:
      0.022708062 = score(doc=824,freq=14.0), product of:
        0.08850355 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.050415643 = queryNorm
        0.256578 = fieldWeight in 824, product of:
          3.7416575 = tf(freq=14.0), with freq of:
            14.0 = termFreq=14.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0390625 = fieldNorm(doc=824)
  0.25 = coord(1/4)

Abstract

We discuss the issues of resolving the information-retrieval problem in large digital collections through the identification and use of document genres. Explicit identification of genre seems particularly important for such collections because any search usually retrieves documents with a diversity of genres that are undifferentiated by obvious clues as to their identity. Also, because most genres are characterized by both form and purpose, identifying the genre of a document provides information as to the document's purpose and its fit to the user's situation, which can be otherwise difficult to assess. We begin by outlining the possible role of genre identification in the information-retrieval process. Our assumption is that genre identification would enhance searching, first because we know that topic alone is not enough to define an information problem and, second, because search results containing genre information would be more easily understandable. Next, we discuss how information professionals have traditionally tackled the issues of representing genre in settings where topical representation is the norm. Finally, we address the issues of studying the efficacy of identifying genre in large digital collections. Because genre is often an implicit notion, studying it in a systematic way presents many problems. We outline a research protocol that would provide guidance for identifying Web document genres, for observing how genre is used in searching and evaluating search results, and finally for representing and visualizing genres.

0.005149705 = product of:
  0.02059882 = sum of:
    0.02059882 = weight(_text_:information in 1747) [ClassicSimilarity], result of:
      0.02059882 = score(doc=1747,freq=2.0), product of:
        0.08850355 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.050415643 = queryNorm
        0.23274569 = fieldWeight in 1747, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.09375 = fieldNorm(doc=1747)
  0.25 = coord(1/4)

Theme

Information Gateway

0.0042914203 = product of:
  0.017165681 = sum of:
    0.017165681 = weight(_text_:information in 4787) [ClassicSimilarity], result of:
      0.017165681 = score(doc=4787,freq=2.0), product of:
        0.08850355 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.050415643 = queryNorm
        0.19395474 = fieldWeight in 4787, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.078125 = fieldNorm(doc=4787)
  0.25 = coord(1/4)

Theme

Information Gateway

0.00424829 = product of:
  0.01699316 = sum of:
    0.01699316 = weight(_text_:information in 1914) [ClassicSimilarity], result of:
      0.01699316 = score(doc=1914,freq=4.0), product of:
        0.08850355 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.050415643 = queryNorm
        0.1920054 = fieldWeight in 1914, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0546875 = fieldNorm(doc=1914)
  0.25 = coord(1/4)

Abstract

MedPilot (www.medpilot.de) ist ein Gemeinschaftsprojekt der Deutschen Zentralbibliothek für Medizin (ZBMed) und des Deutschen Instituts für Medizinische Dokumentation und Information (DIMDI). Im Rahmen der Virtuellen Fachbibliotheken wird MedPilot von der Deutschen Forschungsgemeinschaft (DFG) gefördert. MedPilot basiert auf der Software SISIS-Elektra, welche im Rahmen des Projektes weiterentwickelt wurde. Projektstart im August 2001, Testbetrieb seit Juli 2002, offizielle Eröffnung im Februar 2003

Theme

Information Gateway

0.0034331365 = product of:
  0.013732546 = sum of:
    0.013732546 = weight(_text_:information in 2117) [ClassicSimilarity], result of:
      0.013732546 = score(doc=2117,freq=2.0), product of:
        0.08850355 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.050415643 = queryNorm
        0.1551638 = fieldWeight in 2117, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0625 = fieldNorm(doc=2117)
  0.25 = coord(1/4)

Abstract

This article attempts to provide an overview of the key metadata research issues and the current projects and initiatives that are investigating methods and developing technologies aimed at improving our ability to discover, access, retrieve, and assimilate information on the Internet through the use of metadata.

0.0034331365 = product of:
  0.013732546 = sum of:
    0.013732546 = weight(_text_:information in 4519) [ClassicSimilarity], result of:
      0.013732546 = score(doc=4519,freq=2.0), product of:
        0.08850355 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.050415643 = queryNorm
        0.1551638 = fieldWeight in 4519, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0625 = fieldNorm(doc=4519)
  0.25 = coord(1/4)

Theme

Information Gateway

0.0030039945 = product of:
  0.012015978 = sum of:
    0.012015978 = weight(_text_:information in 1916) [ClassicSimilarity], result of:
      0.012015978 = score(doc=1916,freq=2.0), product of:
        0.08850355 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.050415643 = queryNorm
        0.13576832 = fieldWeight in 1916, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0546875 = fieldNorm(doc=1916)
  0.25 = coord(1/4)

Theme

Information Gateway

0.0021457102 = product of:
  0.008582841 = sum of:
    0.008582841 = weight(_text_:information in 5808) [ClassicSimilarity], result of:
      0.008582841 = score(doc=5808,freq=2.0), product of:
        0.08850355 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.050415643 = queryNorm
        0.09697737 = fieldWeight in 5808, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0390625 = fieldNorm(doc=5808)
  0.25 = coord(1/4)

Source

Information Research & Content Management: Orientierung, Ordnung und Organisation im Wissensmarkt; 23. DGI-Online-Tagung der DGI und 53. Jahrestagung der Deutschen Gesellschaft für Informationswissenschaft und Informationspraxis e.V. DGI, Frankfurt am Main, 8.-10.5.2001. Proceedings. Hrsg.: R. Schmidt