Table of RFID tags

WebThings
#1

Is it possible to create a “Thing”, which stores a table of valid RFID tags.

My project contains 2-300 approved RFID tags, and 20 - 30 RFID readers.

My idea is to build some ESP32 RFID readers, each of which should be able to authenticate, whether a scanned code is valid / ok.
Once a valid code is scanned, it must be transferred to the IOT Gateway, which then performs a specific action, depending on which reader is scanned.

Arduino devices must therefore, be able to retrieve a table of the “valid tags”, from the IOT gateway.
IOT gateway should be able to retrieve the table from a server in the cloud.

I have not found data formats, that can store a table of RFID tags, such as arrays of double or string.

#2

Probably the best you can do right now is to use an enum on a property, which would allow you to specify an array of valid numbers/strings. For example, see here: https://github.com/mrstegeman/mpd-webthing/blob/master/python/mpd-webthing.py#L171-L185