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Ontology-based data access leveraging subjective reports

Author: Gerardo I Simari; et al
Publisher: Cham : Springer, 2017.
Series: SpringerBriefs in computer science.
Edition/Format:   eBook : Document : EnglishView all editions and formats
Summary:
This SpringerBrief  reviews the knowledge engineering problem of engineering objectivity in top-k query answering; essentially, answers must be computed taking into account the user’s preferences and a collection of (subjective) reports provided by other users. Most assume each report can be seen as a set of scores for a list of features, its author’s preferences among the features, as well as other information is  Read more...
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Genre/Form: Electronic books
Additional Physical Format: Print version:
(OCoLC)994852470
Material Type: Document, Internet resource
Document Type: Internet Resource, Computer File
All Authors / Contributors: Gerardo I Simari; et al
ISBN: 9783319652290 331965229X
OCLC Number: 1004842226
Description: 1 online resource.
Contents: Acknowledgments; Contents; 1 Ontology-Based Data Access with Datalog+/-; 1.1 Description Logics; 1.2 Ontology-Based Data Access (OBDA); 1.3 The Datalog+/- Family of Ontology Languages; 1.3.1 Preliminary Concepts and Notations; 1.3.2 Syntax and Semantics of Datalog+/-; 1.3.2.1 Conjunctive Query Answering; 1.3.2.2 The TGD Chase; 1.3.2.3 Computational Complexity; 1.3.3 Datalog+/- Fragments: Towards Decidability and Tractability; References; 2 Models for Representing User Preferences; 2.1 Basic Definitions and Notation; 2.2 Preferences à la Databases; 2.2.1 Relational Databases 2.2.2 Ontology Languages2.2.3 Models for Uncertain Preferences; 2.3 Preferences à la Philosophy and Related Disciplines; 2.4 Final Notes; References; 3 Subjective Data: Model and Query Answering; 3.1 A Logic-Based Data Model; 3.1.1 Trust Measures over Reports; 3.1.2 Relevance of Reports; 3.2 Query Answering Based on Subjective Reports; 3.2.1 A Basic Approach; 3.2.2 Leveraging Trust and Relevance to a Greater Extent; 3.3 Towards More General Reports; References; 4 Related Research Lines; 4.1 Assessing the Impact of Reviews; 4.2 Fraud and Spam Detection; 4.3 Review Summarization 4.4 Fact Finding and Inconsistency Detection4.5 Improving Recommender Systems Leveraging Review Text; References
Series Title: SpringerBriefs in computer science.
Responsibility: Gerardo I. Simari ... [et al.].

Abstract:

This SpringerBrief  reviews the knowledge engineering problem of engineering objectivity in top-k query answering; essentially, answers must be computed taking into account the user’s preferences and a collection of (subjective) reports provided by other users. Most assume each report can be seen as a set of scores for a list of features, its author’s preferences among the features, as well as other information is discussed in this brief. These pieces of information for every report are then combined, along with the querying user’s preferences and their trust in each report, to rank the query results. Everyday examples of this setup are the online reviews that can be found in sites like Amazon, Trip Advisor, and Yelp, among many others. Throughout this knowledge engineering effort the authors adopt the Datalog+/– family of ontology languages as the underlying knowledge representation and reasoning formalism, and investigate several alternative ways in which rankings can b e derived, along with algorithms for top-k (atomic) query answering under these rankings. This SpringerBrief also investigate assumptions under which our algorithms run in polynomial time in the data complexity. Since this SpringerBrief contains a gentle introduction to the main building blocks (OBDA, Datalog+/-, and reasoning with preferences), it should be of value to students, researchers, and practitioners who are interested in the general problem of incorporating user preferences into related formalisms and tools.  Practitioners also  interested in using Ontology-based Data Access to leverage information contained in reviews of products and services for a better customer experience will be interested in this brief and  researchers working in the areas of Ontological Languages, Semantic Web, Data Provenance, and Reasoning with Preferences.

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