Use comments and tags
In most tables, the standard specifies a "comments" column, which lets data creator provide full text, human-readable notes. However, these notes are not usable computationally.
Whenever possible, we recommend to tease out any systematic comments using either tags (see details in the standard about the forms table, the tags table, and the specs for tags) or separate, ad-hoc columns. This provides a more systematic set of annotation, which increases the value of the dataset and is useful in order to filter data. It facilitates selecting relevant slices of data for the purpose of future studies, as well as creating derived datasets.
It is best to use tags any time several forms are part of a series and would have
the same comment. This includes rare forms, information about data quality,
uncertainty and epistemic status, variations (for example dialectal, or register),
types of defectivity (eg. pluralia tantum), etc. Tags can also be used in order to
carry annotations present in the original source, for example all forms marked with "?"
in a dictionary could be tagged as
The comment column should be used mostly for clarifications, notes on choices made for a specific row or for short notes about data treatment.
It is best to use separate columns in all other cases, such as reporting comments from sources, relating one entry to its sources (see how to handle sources), or to entries in other databases (which should be linked using URIs and identifiers).