On Fri, Aug 7, 2009 at 12:55 PM, John Smith<[email protected]> wrote: > --- On Thu, 6/8/09, Roy Wallace <[email protected]> wrote: > >> maxspeed[school_days][08:30-09:30]=40 > > Except that is putting values on the key side of things. To do things > properly you would need something like this. > > maxspeed:school_zone=40 > maxspeed:school_zone:on=08:30-09:30;14:30-15:30
Hmm I'm still undecided whether it really is necessary to enforce a finite set of keys (i.e. force "putting values on the value side of things"). But ok, if you think it is, my main point is still an issue: perhaps we should explicitly state that the restriction applies on "school days" rather than indirectly implying this by using "school_zone". And by the way, in the example you gave, you seem to be using "school_zone" as a placeholder/ID, i.e. a means to link the two tags together. Looking at things more generally what's really happening is: maxspeed:foo=40 maxspeed:foo:on:day=school_days maxspeed:foo:on:time=08:30-09:30;14:30-15:30 This is the problem with enforcing "values" (i.e. continuous values) to be on the right hand side - you need a primary key to join tags. To clarify my point further, how would you propose to tag a 50 kmph maxspeed on Tuesday and Thursday afternoons, if you are forced to put the "values" (i.e. Tuesday, Thursday, 50, 12:00-24:00) on the right hand side? Without that requirement, it's a one-liner: maxspeed[Tu,Th][12:00-24:00] = 50 _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk
