7. 2GIRDIMPLEMENTATION: AMETADATABASE 135 7. 3 UNIQUE PROPERTIES OF THE GIRD MODEL 140 7. 3. 1 The Metadatabase As an Information Resources Lnctionary 140 7. 3. 2 The metadatabase as the GlobaVEnterprise Schema 142 8 THE GLOBAL QUERY SYSTEM 145 8. 1 MODEL ASSISTED GLOBAL QUERY 145 8. l. l The Need for Metadata Support 145 8. l. 2 User Interface for Query Formulation 147 8. 1. 3 Integrated Schema for Global Query 147 8. 2 THE CONCEPTUAL MODEL 148 8. 2. 1 The Goals 149 8. 2. 2 The Defmitive Model for Metadata Requirements 149 8. 3 THE EXECUTION MODEL 156 8. 3. 1 Model Traversal 156 8. 3. 2 Rule-Base Conversion 157 8. 4 ANALYSIS 159 8. 4. 1 Metadata Modeling vs. Schema Integration 159 8. 4. 2 Conceptual Evaluation of the MGQS A | Enterprise Integration And Modeling by Cheng Hsu, Paperback | Indigo Chapters