Tim, Christian, I suggest to use the same approach as start_date [1], default to Gregorian, allow change by separate "j:date, xxx:date" prefix for another calendar.
The examples shown on the webpage use double periods for ranges [2008-08-08..2008-08-24] instead of colon, which might not be a bad idea in case someone starts putting full timestamps in there. best, rhw [1] http://wiki.openstreetmap.org/wiki/Key:start_date On 2013-01-23, at 1:22 PM, [email protected] wrote: > Message: 2 > Date: Wed, 23 Jan 2013 16:08:31 +0100 > From: Tim Alder <[email protected]> > To: [email protected] > Subject: Re: [Historic] Temporal Tagging - old names > Message-ID: <[email protected]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Hello, > I like the python-style for the time range definition and this style > don't break with OSM-rule of unique keys for each object. > > What we should additionally handle is to work with uncertainties. > So in my mind there are different kinds of sources: > *If we found documents with the exact year it's easy: > name:[year1:year2] > *If we find only two historical maps with a streetname and I know when > these maps were printed. I know that the street got the name before the > first map was printed and had this name also after the second, younger map. > (Problem is that changes need in the past some years to come to a map, > also today it can need a while). In such a case I would propose to use: > name:[<year1:>year2] > *If a street has the name from a person, it's mostly so that the street > didn't get the name before the person was born. In our example Emperor > Wilhelm I. was born 1797. So I would say: > name:[>1797:1936]=Emperor-Wilhelm-Street > Perhaps somebody comes later with a map that shows that the complete > street didn't exist at this time. So I hope we find a system that > becomes better and better over time with the help of many users without > to be perfect at the first day. > > As standard for time we should reference at ISO 8601, so if people know > it exactly they would be able to use YYYY-MM-DD instead of YYYY. > > To make it not to complicated, I hope the gregorian calendar is ok. > > > Greetings Tim _______________________________________________ Historic mailing list [email protected] http://lists.openstreetmap.org/listinfo/historic
