The metadata of the resource is very useful for some conditions. Making it as one column of the meter table or resource table is not very convenient, so I think we'd better to add another metadata table to record the key-values, and join to meter or resource table.
The metadata of the resource is very useful for some conditions. Making it as one column of the meter table or resource table is not very convenient, so I think we'd better to add another metadata table to record the key-values, and join to meter or resource table.