Qualifying and update measure with meta information afterwards

Hi all,

I have an Oss 1.9 influxdb database storing measures. I’d like to give users from a custom application I have made to add and qualify (a meta text string) to every single measure and/or a range of measures within dates.

This meta information could come later in the process (after the measure is stored on Db)
My first idea would be to add an extra tag/field on my measurement and added using an Update function on the measure itself. I bet this would not be the best Influx approach, isn’t it ?

I have another idea on storing the date ranges in a more regular database (not influx) and then combining both Db I could retrieve the correct meta information from this external Db…

Is there a better way to implement my use case? any idea or alt option?