2012/9/30 Neil Harris neil@tonal.clara.co.uk:
On 30/09/12 13:00, benedix@zedat.fu-berlin.de wrote:
Hi, I think a valid_from and valid_to-field would be a great idea. Especially for queries on the db. But I think it is a fundamental design decision and I'm not sure if it's possible to integrate now...
LB
Seconded.
This would, for example, allow next year's train timetables to be loaded into the database prior to their period of validity, and for the cutover between last year's and this year's timetables to then happen automatically at the appointed date.
-- N.
Sorry if I get back on this issue, but I don't think that the train timetables will be THAT important in the future - except for the ones who have to use DeutscheBahn's services.
It may be, by the way, that this example is just a wrong one to illustrate something that Wikidata WILL need, that are "historical data".
There's plenty of datas that are "valid" only from $DateA to $DateB (i.e. the affiliation to a particular federation, the use of a particular flag, the definition of a particular capitol city...). Is this something that you guys already dealt with or not?
Plus, there's also another thing. Let's say that I want to add to [[Item:Football Federation of Israel]] a particular property "Member". Now, the Israelis were: * full members of AFC from 1952 to 1974, * associated members of OFC from 1974 to 1979, and from 1984 to 1991; * associated members of UEFA from 1979 to 1984; * full members of UEFA from 1991 on.
How do we deal with the second statement ("valid from $DateA to $DateB and from $DateC to $DateD")? Is that something already resolved?
Thanks in advance for the answers.