Document Spanners for Extracting Incomplete Information: Expressiveness and Complexity
SIGMOD/PODS '18: International Conference on Management of Data Houston TX USA June, 2018, pp. 125-136, 2018.
Rule-based information extraction has lately received a fair amount of attention from the database community, with several languages appearing in the last few years. Although information extraction systems are intended to deal with semistructured data, all language proposals introduced so far are designed to output relations, thus making ...More
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