part Part 1: The Context -- chapter 1 Introduction -- chapter 2 Geographic Ontologies -- chapter 3 Semantic Interoperability -- part Part 2: Theoretical Foundations -- chapter 4 Ontologies -- chapter 5 Concepts -- chapter 6 Semantics -- part Part 3: Formal Approaches -- chapter 7 Knowledge Representation Instruments -- chapter 8 Formal Concept Analysis -- chapter 9 Conceptual Graphs -- chapter 10 Channel Theory -- chapter 11 Description Logics -- chapter 12 Natural Language and Semantic Information Extraction -- chapter 13 Similarity -- part Part 4: Ontology Integration -- chapter 14 Integration Framework -- chapter 15 Integration Approaches -- chapter 16 Integration Guidelines -- part Part 5: Post-Review -- chapter 17 Epilogue.