The score stemming from the SVM. Higher score corresponds to a better PSM than a lower score. The PSMs q-value, i.e. the expected fraction of incorrect identifications up to this PSM score The PSMs posterior error probability, i.e. the probability that this PSM is incorrect. This field contains the observed and predicted retention time in minutes Peptide sequence of this PSM including the amino acids N- and C-terminal of the peptide in the proteins sequence. Unique PSM identifier Version of percolator Major version number Minor version number Schema minor version number Probability (Double in [0-1] or NaN)