Similarity measure an essential point in data integration Similarity measure will be applied to I Keyword search From key word query interface to structured query interface Schema matching From integrated query interface to local query interface Result merge Duplicate records detection(field level) Q={keyl,key2,…} Record record 1 Integrated Interface=k<ClV1>,<C2.V2>, Record Record2 ocal Interface=<LLv1>, <L2 v2>, Record3Record3 Record4→ Record4Similarity measure — an essential point in data integration ◼ Similarity measure will be applied to: ◼ Keyword search From keyword query interface to structured query interface ◼ Schema matching From integrated query interface to local query interface ◼ Result merge Duplicate records detection (field level ) Q ={ , , …} Integrated Interface={ , ,…} Local Interface={ , ,…} key1 key2 <C1,V1><C2,V2> <L1,v1> <L2,v2> Record1 Record2 Record3 Record4 Record1 Record2 Record3 Record4