The Semantic Web: crafting infrastructure for agency

381 Pages·2005·2.73 MB·English

by  Bo Leuf

THE SEMANTIC WEB
CRAFTING INFRASTRUCTURE FOR AGENCY
Bo Leuf
Technology Analyst, Sweden

THE SEMANTIC WEB

THE SEMANTIC WEB
CRAFTING INFRASTRUCTURE FOR AGENCY
Bo Leuf
Technology Analyst, Sweden
Copyright#2006 JohnWiley&SonsLtd,TheAtrium,SouthernGate,Chichester,
WestSussexPO198SQ,England
Telephone [phone]
Email(forordersandcustomerserviceenquiries):[email protected]
VisitourHomePageonwww.wiley.com
AllRightsReserved.Nopartofthispublicationmaybereproduced,storedinaretrievalsystemortransmitted
inanyformorbyanymeans,electronic,mechanical,photocopying,recording,scanningorotherwise,
exceptunderthetermsoftheCopyright,DesignsandPatentsAct1988orunderthetermsofalicenceissued
bytheCopyrightLicensingAgencyLtd,90TottenhamCourtRoad,LondonW1T4LP,UK,withoutthe
permissioninwritingofthePublisher.RequeststothePublishershouldbeaddressedtothePermissions
Department,JohnWiley&SonsLtd,TheAtrium,SouthernGate,Chichester,WestSussexPO198SQ,
England,[email protected],orfaxedto([phone].
Thispublicationisdesignedtoprovideaccurateandauthoritativeinformationinregardtothesubjectmatter
covered.ItissoldontheunderstandingthatthePublisherisnotengagedinrenderingprofessional
services.Ifprofessionaladviceorotherexpertassistanceisrequired,theservicesofacompetent
professionalshouldbesought.
OtherWileyEditorialOffices
JohnWiley&SonsInc.,111RiverStreet,Hoboken,NJ07030,USA
Jossey-Bass,989MarketStreet,SanFrancisco,CA94103-1741,USA
Wiley-VCHVerlagGmbH,Boschstr.12,D-69469Weinheim,Germany
JohnWiley&SonsAustraliaLtd,42McDougallStreet,Milton,Queensland4064,Australia
JohnWiley&Sons(Asia)PteLtd,2ClementiLoop#02-01,JinXingDistripark,Singapore129809
JohnWiley&SonsCanadaLtd,22WorcesterRoad,Etobicoke,Ontario,CanadaM9W1L1
Wileyalsopublishesitsbooksinavarietyofelectronicformats.Somecontentthatappearsin
printmaynotbeavailableinelectronicbooks.
LibraryofCongressCataloging-in-PublicationData
Leuf,Bo,TechnologyAnalyst,Sweden.
TheSemanticWeb:craftinginfrastructureforagency/BoLeuf.
p.cm.
Includesbibliographicalreferencesandindex.
ISBN0-470-01522-5
1. SemanticWeb.I.Title.
TK5105.88815.L482005
025.04–dc22 2005024855
BritishLibraryCataloguinginPublicationData
AcataloguerecordforthisbookisavailablefromtheBritishLibrary
ISBN-13978-0-470-01522-3(HB)
ISBN-100-470-01522-5(HB)
Typesetin10/12ptTimesRomanbyThomsonPress(India)Limited,NewDelhi
PrintedandboundinGreatBritainbyAntonyRowe,Chippenham,Wilts
Thisbookisprintedonacid-freepaperresponsiblymanufacturedfromsustainableforestry
inwhichatleasttwotreesareplantedforeachoneusedforpaperproduction.
I dedicate this book to the many visionaries, architects, and programmers,
who all made the Internet an interesting place to ‘live’ and work in.
And especially to Therese.

Contents
Foreword xiii
Preface xv
Part I Content Concepts
1 Enhancing the Web 3
Chapter 1 at a Glance 3
There and Back Again 4
Resource Identifiers 5
Extending Web Functionality 11
From Flat Hyperlink Model 17
To Richer Informational Structures 22
The Collaboration Aspect 23
Extending the Content Model 26
Mapping the Infosphere 27
Well-Defined Semantic Models 30
2 Defining the Semantic Web 31
Chapter 2 at a Glance 31
From Model to Reality 32
The Semantic Web Concept 33
Representational Models 43
The Road Map 46
Identity 46
Markup 49
Relationships 49
Reasoning 51
Agency on the Web 52
Semantic P2P 52
The Visual Tour 53
The Map 54
The Architectural Goals 55
The Implementation Levels 57