Folksonomies: Indexing and Retrieval in Web 2.0

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Folksonomies: Indexing and Retrieval in Web 2.0.
Isabella Peters
Knowledge and Information. De Gruyter, Saur: Berlin. 2009
English / Englisch

Contents
Introduction	1
Current State of Research	5
Open Questions in Folksonomy Research	6
Notes on the Book's Structure	8
Bibliography	10

Chapter 1 Collaborative Information Services	13
Web 2.0 vs Social Software vs Collaborative Information Services	13
Social Bookmarking Services	23
E-Commerce	37
Commercial Information Services	45
Music-Sharing Services	49
Libraries 2.0 - Museums	55
Photosharing Services	69
Videosharing Services	80
Social Networks	88
Blogs and Blog Search Engines	96
Games with a Purpose (GWAP) - Tagging Games	100
Summary	104
Bibliography	107

Chapter 2 Basic Terms in Knowledge Representation and Information Retrieval	119
Introduction to Knowledge Representation	119
Paradigmatic and Syntagmatic Relations	124
Ontologies	124
Thesauri	125
Classification Systems	126
Nomenclatures	128
Text-Word Method	128
Citation Indexing	128
Knowledge Representation in the World Wide Web	129
Introduction to Information Retrieval	130
Relevance Distributions	131
Retrieval Models	133
Text Statistics	134
Vector Space Model	135
Probabilistic Model	136
Link Topology - Kleinberg Algorithm and PageRank	138
Information Linguistics - NLP	139
Similarity Coefficients and Cluster Analysis	142
Network Model	144
Bibliography	146

Chapter 3 Knowledge Representation in Web 2.0: Folksonomies	153
Definition of the Term 'Folksonomy'	153
Tags - Users - Resources	157
Cognitive Skills	161
Broad vs Narrow Folksonomies	164
Collective Intelligence	166
Tag Distributions	170
Users' Tagging Behavior	184
Tag Categories	196
Tag Recommender Systems	204
Advantages and Disadvantages of Folksonomies in Knowledge Representation	212
Problem-Solving and Structuring Endeavors in Folksonomies	228
Tag Gardening in Knowledge Representation	235
Traditional Methods of Knowledge Representation vs Folksonomies	247
Outlook	255
Bibliography	262

Chapter 4 Information Retrieval with Folksonomies	283
The Relation between Knowledge Representation and Information Retrieval	285
Searching vs Browsing vs Retrieving	287
Information Filters - Information Filtering - Collaborative Filtering	293
Folksonomy-Based Recommender Systems in Information Retrieval	299
Retrieval Effectiveness of Folksonomies	310
Visualizations of Folksonomies	314
Disadvantages of Folksonomies in Information Retrieval	332
Query Tags as Indexing Tags	336
Relevance Ranking in Folksonomies	339
Power Tags	363
Tag Gardening in Information Retrieval	372
Outlook	388
Bibliography	393

Conclusion	411
Bibliography	418

Index of Names	419
Subject Index	431

INFORMATIONSWISSENSCHAFT

Folksonomies: Indexing and Retrieval in Web 2.0