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Author:
Publisher:
ISBN:
Category : Astronomy
Languages : en
Pages : 22
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Book Description
Author:
Publisher:
ISBN:
Category : Astronomy
Languages : en
Pages : 22
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Book Description
Author:
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ISBN:
Category : America
Languages : en
Pages : 748
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Book Description
Author: United States. Internal Revenue Service
Publisher:
ISBN:
Category : Income tax
Languages : en
Pages : 234
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Book Description
Author: National Library of Medicine (U.S.)
Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 1118
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Book Description
A keyword listing of serial titles currently received by the National Library of Medicine.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 352
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Book Description
Author: Nancy Burns
Publisher: Elsevier España
ISBN: 9788481747201
Category : Medical
Languages : en
Pages : 582
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Book Description
This leading texbook of nursig research, written by two of the most renowned experts in the field, is now published in full-colour, and this, the 4th edition has now been updated throughout to reflect today's evidence-based practice.
Author: World Health Organization
Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 480
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Author:
Publisher: Bib. Orton IICA / CATIE
ISBN:
Category :
Languages : en
Pages : 60
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Author:
Publisher: IICA Biblioteca Venezuela
ISBN:
Category :
Languages : en
Pages : 680
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Author: Eduardo Mena
Publisher: Springer Science & Business Media
ISBN: 146151441X
Category : Computers
Languages : en
Pages : 227
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Book Description
This work is a revision of the doctoral dissertation of Eduardo Mena pre sented to the Department of Computer Science and System Engineering at the University of Zaragoza (Spain) in November 1998 [Mena 98]. The OBSERVER system was developed as a result of this Ph.D. thesis. This book is composed of eight chapters. In Chapter 1 we introduce our rationale for writing a book about systems that process queries in global information systems. Then in Chapter 2 we review the techno logical context for our work, including distributed and heterogeneous environments and the use of ontologies. We also compare related work to our own. Chapter 3 presents our proposed global system architecture for query processing in global information systems. The main modules in the architecture and the main steps given to process a query are briefly introduced. Chapters 4 through 7 provide a detailed description of each query processing step. In Chapter 4 we detail the steps needed to access the data corre sponding to a query formulated over an ontology. All the aspects related to distribution, structural and semantic heterogeneity, and restricted query capabilities of the underlying data repositories are considered in this chapter. The main features of the mapping information that relates ontologies and data repositories are also described. Finally, we show the process of generating appropriate plans to access each involved reposi tory and the correlation of the answers coming from different reposito ries.
