http://doi.acm.org/10.1145/262762.262770 db/journals/sigmod/McHughAGQW97.html Jason McHugh Serge Abiteboul Roy Goldman Dallan Quass Jennifer Widom Lore: A Database Management System for Semistructured Data. 54-66 sigmodR/26-3/P054.pdf 1997 26 SIGMOD Record 3 db/journals/sigmod/sigmod26.html#McHughAGQW97 http://www.acm.org/sigmod/record/issues/9709/lore.ps