System and method for transformation of SPARQL query

The invention relates to a system for the transformation of SPARQL query, comprising a grammar/morphology analyzer, an implicit negative mode detector, an implicit negative mode transformer, a separator, a negative mode transformer, a positive mode transformer and a combiner, wherein the grammar/morphology analyzer is used for analyzing the SPARQL query; the implicit negative mode detector is used for detecting the implicit negative mode of the analyzed SPARQL query; the implicit negative mode transformer is used for transforming the detected implicit negative mode into an explicit negative mode; the separator is used for separating the explicit negative mode from the positive mode of an analyzed SPARQL query statement; the negative mode transformer is used for transforming the explicit negative mode into an SQL (Structured Query Language) statement of a negative part; the positive mode transformer is used for transforming the positive mode into the SQL statement of a positive part; and the combiner is used f