TYPE: type of spectral feature in the body of the rule. For example, “[mass, mass_diff]” means that the rule predicts the substructure based on the co-presence of a fragment and a loss in the input spectrum.
FEATURE: m/z values of corresponding fragments or losses
SUBSTRUCTURE: predicted substructure
SCORE[SENSITIVITY]: sensitivity measures the statistical significance of matched rules. The higher the score is, the more meaningful is the rule for substructure prediction.