index Enquiry type information structure

See also:

The static file may well be kept on a central server, but in any case every local server should have a full copy, as it is not much information. Every change needs to be originated in the hub and promulgated to the local servers.

Static information

Dynamic information

Global activity in each enquiry type could be tracked as follows.

Numbers of active enquiries in the enquiry type
Every time an enquiry is sent, the hub keeps a record of to answer the questions, how many enquiries are there in this enquiry type in the last: hour, day, month?

Keeping track of correspondences looks like too much effort and questionable value.