i have a really simple and stupid question to ask. During the QIIME2 analysis, when a Feature[table] .qzv file is displayed in QIIME2 view webpage, the first column sums up the ‘Feature ID’ or ‘OTU ID’ of the current analysis. My question is: how does this alpha-numeric code is generated? It is specific to each OTU that you are observing, but is it just a random code that can vary at each analysis? In other words, does this correspond to a specific OTU level (e.g. Genus) even without the corresponding taxonomy?
I hope my question was pretty clear, in other case I will try to explain it in a better way!