Information Brokering Across Heterogeneous Digital Data: A Metadata-based Approach

Contents......Page 8
List of Figures......Page 12
List of Tables......Page 14
Preface......Page 16
Acknowledgments......Page 18
Foreword......Page 20
1 INTRODUCTION......Page 24
1. INFORMATION OVERLOAD......Page 25
1.1 HETEROGENEITY......Page 26
1.2 GLOBALIZATION......Page 27
2. INFORMATION BROKERING: HANDLING THE INFORMATION OVERLOAD......Page 29
2.1 INFORMATION BROKERING: STAKEHOLDER AND BENEFICIARIES......Page 30
2.2 LEVELS OF INFORMATION BROKERING......Page 31
2.3 THE ROLE OF FACILITATORS ON THE GII......Page 36
2.4 INFORMATION BROKERING: RELATION TO OTHER APPROACHES......Page 37
3. BOOK ORGANIZATION......Page 38
2 METADATA AND ONTOLOGIES......Page 40
1.1 THE APPLICATION SCENARIOS PERSPECTIVE......Page 41
1.2 THE INFORMATION CONTENT PERSPECTIVE......Page 42
2.1 LANGUAGE FOR METADATA REPRESENTATION......Page 45
2.2 VOCABULARY FOR METADATA EXPRESSIONS......Page 46
2.3 CONSTRUCTING INTENSIONAL METADATA DESCRIPTIONS......Page 47
2.4 DESIGN AND USE OF ONTOLOGIES......Page 48
3. SUMMARY......Page 51
1. AN (ABSTRACT) METADATA-BASED ARCHITECTURE......Page 52
1.1 THE VOCABULARY BROKERING COMPONENT......Page 54
1.2 THE METADATA BROKERING COMPONENT......Page 56
2. PROPERTIES OF INFORMATION BROKERING ARCHITECTURES......Page 61
2.1 ISSUES OF SCALABILITY......Page 62
2.2 ISSUES OF EXTENSIBILITY......Page 64
2.3 ISSUES OF ADAPTABILITY......Page 65
3.1 FEDERATED MULTIDATABASE SYSTEMS......Page 66
3.2 MEDIATOR-BASED SYSTEMS......Page 69
3.3 AGENT-BASED BROKERING SYSTEMS......Page 71
4. SUMMARY......Page 73
1. A MULTIMEDIA INFORMATION REQUEST......Page 74
2.1 METADATA-BASED ENCAPSULATION AND BROKERING......Page 77
2.2 THE INFOHARNESS SYSTEM ARCHITECTURE......Page 80
3. ISSUES OF METADATA AND ARCHITECTURE IN THE MIDAS SYSTEM......Page 86
3.1 ROLE OF METADATA IN MIDAS......Page 87
3.2 THE MIDAS SYSTEM ARCHITECTURE......Page 89
3.3 PROPERTIES OF THE MIDAS SYSTEM ARCHITECTURE......Page 95
4.1 METADATA-BASED VIEW OF THE INFORMATION SPACE......Page 98
4.2 MAPPING DOMAIN SPECIFIC METADATA TO TEXTUAL DATA......Page 99
4.3 TRANSLATING QUERIES INTO TOPIC EXPRESSIONS......Page 101
5.1 SCALABILITY V/S EXTENSIBILITY: SPACE/TIME TRADE-OFFS......Page 103
5.2 SCALABILITY: THE STEPPING STONE TO ADAPTABILITY......Page 106
6. SUMMARY: METADATA AS SCHEMA FOR DIGITAL DATA......Page 109
5 CAPTURING INFORMATION CONTENT IN STRUCTURED DATA......Page 112
1. SCHEMATIC HETEROGENEITIES ACROSS MULTIPLE DATABASES......Page 113
1.1 DOMAIN DEFINITION INCOMPATIBILITY......Page 114
1.2 ENTITY DEFINITION INCOMPATIBILITY......Page 117
1.3 DATA VALUE INCOMPATIBILITY......Page 120
1.4 ABSTRACTION LEVEL INCOMPATIBILITY......Page 121
1.5 SCHEMATIC DISCREPANCIES......Page 123
2. CAPTURING THE INFORMATION CONTENT OF DATABASE OBJECTS......Page 125
2.1 SEMANTIC PROXIMITY: CAPTURING INFORMATION CONTENT......Page 126
2.2 C-CONTEXTS: A PARTIAL REPRESENTATION......Page 131
2.3 ASSOCIATION OF MAPPINGS WITH CONTEXTS: AN ALGEBRA......Page 139
2.4 ADVANTAGES OF CONTEXT REPRESENTATION: SOME ILLUSTRATIVE EXAMPLES......Page 143
3. SUMMARY......Page 146
6 THE INFOSLEUTH SYSTEM......Page 152
1. THE INFOSLEUTH AGENT-BASED ARCHITECTURE......Page 153
2. METADATA BROKERING IN INFOSLEUTH......Page 155
3. INFOSLEUTH: A SUMMARY......Page 158
7 VOCABULARY BROKERING IN THE OBSERVER SYSTEM......Page 160
1. ARCHITECTURE OF OBSERVER......Page 161
1.1 ARCHITECTURE OF THE METADATA SYSTEM......Page 162
1.2 THE INTER-ONTOLOGIES RELATIONSHIPS MANAGER (IRM)......Page 166
1.3 PROPERTIES OF THE OBSERVER ARCHITECTURE......Page 169
2. VOCABULARY BROKERING BY THE QUERY PROCESSOR......Page 171
2.1 SEMANTICS PRESERVING VOCABULARY BROKERING......Page 172
2.2 VOCABULARY BROKERING WITH LOSS OF INFORMATION......Page 180
3. OBSERVER: A SUMMARY......Page 190
1. ONTOLOGIES AND CONSTRUCTION OF METADATA......Page 204
2. VOCABULARY BROKERING......Page 206
3. METADATA BROKERING......Page 207
4. SUMMARY......Page 210
1. THE SIMS PROJECT......Page 212
2. THE TSIMMIS PROJECT......Page 214
3. THE INFORMATION MANIFOLD PROJECT......Page 216
4. THE KMED PROJECT......Page 217
5. THE CONCEPTUAL INDEXING/RETRIEVAL PROJECT......Page 219
6. HERMES: A HETEROGENEOUS REASONING AND MEDIATOR SYSTEM......Page 220
7. INFOSCOPES: MULTIMEDIA INFORMATION SYSTEMS......Page 222
8. THE CONTEXT INTERCHANGE NETWORK PROJECT......Page 224
9.1 LEVEL OF INFORMATION BROKERING......Page 226
9.2 METADATA: TYPES, LANGUAGES AND COMPUTATION......Page 227
9.3 ARCHITECTURAL PROPERTIES......Page 229
10. SUMMARY......Page 231
10 CONCLUSION......Page 232
References......Page 236
B......Page 244
D......Page 245
I......Page 246
W......Page 247