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E-Librarian Service : User-Friendly Semantic Search in Digital Libraries / by Serge Linckels, Christoph Meinel
Contributor(s): Resource type: Ressourcentyp: Buch (Online)Book (Online)Language: English Series: X.media.publishing | SpringerLink BücherPublisher: Berlin, Heidelberg : Springer-Verlag Berlin Heidelberg, 2011Description: Online-Ressource (XV, 212p. 67 illus., 10 illus. in color, digital)ISBN:- 9783642177439
- Elektronische Bibliothek
- Semantic Web
- Suchmaschine
- Information Retrieval
- Ontologie Wissensverarbeitung
- Natürlichsprachiges System
- Abfrageverarbeitung
- Benutzerorientierung
- Suchverfahren
- Computer Science
- Computer science
- Computer Communication Networks
- Information systems
- Information storage and retrieval systems
- Multimedia systems
- Translators (Computer programs)
- 025.04
- 025.0427 025.5/24
- QA75.5-76.95
- ZA4065
Contents:
Summary: This book introduces a new approach in designing E-Librarian Services. Such a system is able to retrieve multimedia resources from a digital library in a more efficient way than by browsing through an index, or by using a simple keyword search. It combines recent advances in multimedia information retrieval with aspects of human-machine interfaces. The user can enter his question in natural language. The premise is that more pertinent results would be retrieved if the search engine understood the sense of the user's query. The returned results are then logical consequences of an inference rather than of keyword matchings. An E-Librarian Service simulates a human librarian. Hence, it does not return the answer to the user's question, but it retrieves the most pertinent document(s), in which the user finds the answer to his question. Also, an E-Librarian Service always proposes a solution to the user, even if the system concludes that there is no exhaustive answer.PPN: PPN: 1650909632Package identifier: Produktsigel: ZDB-2-SCS
E-Librarian Service; Preface; Contents; 1 Introduction to E-Librarian Services; 1.1 From Ancient to Digital Libraries; 1.2 From Searching to Finding; 1.2.1 Searching the Web; 1.2.2 Searching Multimedia Knowledge Bases; 1.2.3 Exploratory Search; 1.3 E-Librarian Services; 1.3.1 Overview; 1.3.2 Early Question-Answering Systems; 1.3.3 Natural Language Interface; 1.3.4 No Library without a Librarian; 1.3.5 Characteristics of an E-Librarian Service; 1.4 Overview and Organization of the Book; Part I Key Technologies of E-Librarian Services; 2 Semantic Web and Ontologies
2.1 What is the Semantic Web?2.1.1 The Vision of the Semantic Web; 2.1.2 Semantic Web vs. Web n.0; 2.1.3 Three Principles Ruling the Semantic Web; 2.1.4 Architecture; 2.2 Ontologies; 2.2.1 Ontology Structure; Individuals; Classes; Attributes; Relationships; 2.2.2 Upper- and Domain Ontologies; 2.2.3 Linked Data; 2.2.4 Expressivity of Ontologies; Lightweight Ontologies; Heavyweight Ontologies; 2.3 XML { Extensible Markup Language; 2.3.1 XML: Elements, Attributes and Values; 2.3.2 Namespaces and Qualified Names; 2.3.3 XML Schema; 2.3.4 Complete Example; 2.3.5 Limitations of XML
2.4 RDF { Resource Description Framework2.4.1 RDF Triples and Serialization; 2.4.2 RDF Schema; 2.4.3 Complete Example; 2.4.4 Limitations of RDF; 2.5 OWL 1 and OWL 2 - Web Ontology Language; 2.5.1 Instances, Classes and Restrictions in OWL; 2.5.2 Complete Example; 2.5.3 From OWL 1 to OWL 2; 2.5.4 SPARQL, the Query Language; 3 Description Logics and Reasoning; 3.1 DL { Description Logics; 3.1.1 Concept Descriptions; Example: the AL-Language; 3.1.2 DL Languages; 3.1.3 Equivalences between OWL and DL; 3.2 DL Knowledge Base; 3.2.1 Terminologies (TBox); Definitions; Inclusion Assertions
Cyclic and Acyclic TerminologiesExpanding Terminologies; 3.2.2 World Descriptions (ABox); 3.3 Interpretations; 3.3.1 Interpreting Individuals, Concepts, and Roles; 3.3.2 Modeling the Real World; Consistency of a DL Knowledge Base; Logical Consequence; 3.4 Inferences; 3.4.1 Standard Inferences; Satisfiability (concepts); Subsumption (concepts); Equivalence and Disjointness (concepts); Instance Checking (ABox); Consistency check (ABox); 3.4.2 Non-Standard Inferences; Most Specific Concept (ABox); Least Common Subsumer (concepts); Difference Operation; Matching of Concept Descriptions (concepts)
Concept Rewriting (concepts)Concept Cover (concepts); Concept Contraction and Concept Abduction; 4 Natural Language Processing; 4.1 Overview and Challenges; 4.1.1 Syntax, Semantics and Pragmatics; 4.1.2 Difficulties of NLP; 4.1.3 Zipf's law; 4.2 Dealing with Single Words; 4.2.1 Tokenization and Tagging; 4.2.2 Morphology; 4.2.3 Building Words over an Alphabet; 4.2.4 Operations over Words; 4.3 Semantic Knowledge Sources; 4.3.1 Semantic relations; 4.3.2 Semantic resources; 4.4 Dealing with Sentences; 4.4.1 Phrase Types; 4.4.2 Phrase Structure; 4.4.3 Grammar; 4.4.4 Formal languages
4.4.5 Phrase structure ambiguities
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