Data Integration for Relational Web. Michael Cafarella Alon Halevy Nodira Khoussainova University of Washington Google, inc University of Washington. OVERVIEW. INTRODUCTION OCTOPUS AND ITS OPERATORS ALGORITHMS IMPLEMENTATION AT SCALE EXPERIMENTS RELATED WORK CONCLUSIONS
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Michael Cafarella Alon Halevy Nodira Khoussainova
University of Washington Google, inc University of Washington
The query would be reformulated to
In OCTOPUS system, the description for data sources are not prepared in advance.
Search and Context operators are sufficient to express semantic mappings for sources to the mediated schema.
1. SEARCH OPERATOR
2. CONTEXT OPERATOR
3. EXTEND OPERATOR:
The Algorithm used is shown below: