In some cases, a single MSP comment implies multiple attributes, as in the case of "Nreps" mapping to "MS:1003070|number of replicate spectra used" (accession of the CV term in the PSI-MS controlled vocabulary and its definition) and "MS:1003069|number of replicate spectra available", and implying that peak aggregation of type "MS:1003254|peak attribute=MS:1003279|observation frequency of peak" is present.