How will Hivemind handle NAIs when SMTs come out?

I was studying utils.normalize.parse_amount() and saw that it handles NAI inputs but checks them against a CONSTANT that currently hosts mappings to STEEM, SBD and VESTS NAIs.

Will there be changes to how token symbols are stored in the DB? Currently, it's the actual symbol that's stored. Will this change to NAIs? Or will there be a common registry that Hivemind will pull from in the future?