7. The information retrieving apparatus according to claim 1 , wherein the recognized vocabulary producing unit uses, as the additionally recognized vocabulary, a vocabulary obtained by editing the character string input from the operation input unit using a predetermined method.
8. The information retrieving apparatus according to claim 7 , wherein the recognized vocabulary producing unit uses, as the additionally recognized vocabulary, a vocabulary obtained by editing the character string input from the operation input unit based on a unit of a morpheme of separating the character string that is received in a value of each attribute registered to the name database.