- From: Élie Roux <elie.roux@telecom-bretagne.eu>
- Date: Thu, 3 Sep 2020 10:30:21 +0200
- To: "Little, Chris" <chris.little@metoffice.gov.uk>
- Cc: "public-sdwig@w3.org" <public-sdwig@w3.org>
Dear all, Sorry for the long delay! > I am very wary of adding a few properties " so that some arithmetic can be performed ". > > Do you mean integer arithmetic only? Or do you need rational or real numbers as well? If there is a logically underlying coordinate reference system, no problem. And calendars, which are not coordinate reference systems, have all sorts of 'special' arithmetic. The missing year '0' between CE and BCE is perhaps the simplest example. > > However, if one has constructed a temporal reference system based on, say, reigns of rulers such as Pharoahs, or sets of tree rings or ice cores, it is a logical mistake to infer that (correct) arithmetic can be performed. There may be gaps or overlaps in the historical record such as interregnums. Sure, I agree. I only tried to move in that direction because I interpreted some feedback as a desire to encode eras as time intervals... but I might have misinterpreted. In fact I'm rather confused by what the next steps could be? Will there be some formal discussions, with a review of the proposal? How do these things usually work? Best, -- Elie
Received on Thursday, 3 September 2020 08:30:44 UTC