1. P2P Information Interoperability & Decision Support Domain Application SEMANTIC INTEROP QUERY PROCESSING GIS INTEROP P2P ● Heterogeneous semantic ● Semantic description of sources SEMANTIC INTEROP QUERY PROCESSING GIS INTEROP P2P ● Query rewriting ● Query plan and optimization ● Merge respond ● More complex and heterogeneous ● Spatial ontology ● Model Architecture ● Characteristics

2. Common Ontology Super Peer Provider Peer 1 Query Sending Tool Request Peer Query Commonity Context Agreement Export Schema (local ontology) Local Data Part of Export Schema Part of Common Ontology Provider Peer n Agreement Export Schema (local ontology) Local Data Part of Export Schema Part of Common Ontology Agreement Context Local Context

3. Common Ontology Super Peer Provider Peer 1 Query Sending Tool Request Peer Query Community Context Part of Common Ontology Provider Peer n Agreement Context Local Context Part of Common Ontology 13a 3b 3c Agreement Local Data/ Information Part of Export Schema 2 Query Respond Management Agreement Local Data/ Information 2 Part of Export Schema Query Respond Management Initial Process Query Process 1 Registration process, before the process common ontology and export schema should be ready Agreement process between local ontology (export schema) and common ontology a). concept adjustment; b). sending query; c). negotiation of the query; d). respond of the query 2 3 3d