On a fresh vanilla install of wordpress users have default entries like nickename, first_name, last_name and so forth in wp_usermeta. I'm not sure if that changes often or at all but I can't seem to find any documentation what the default entries are.
I would have expected it here: https://codex.wordpress.org/Database_Description#Table:_wp_usermeta
Is the default set documented and where?
Reason for asking: I'm building a plugin to replicate settings to other users but would like to exclude the default entries (or at least annotate on them or treat them differently). And to maintain the plugin, I'd like to be able to look those up in case there are changes.