On 12 November 2010 12:28, Peter Wendorff <[email protected]> wrote: > start_date, as you see in this example, is a generic tag, like e.g. width is. > Refinements like start_date:construction, start_date:usage; > start_date:planning; start_date:disusage; start_date:abandonment are possible > - but start_date should not be used to be one of these.
Actually the Sagrada Familia is a good example of the problem with modifier tags like "width": it's not clear which feature they apply to if one node or way or relation represents more than one feature. The Sagrada Familia is at the same time a building, a place of worship and a construction site. The start_date values are different for each, but I guess if I see these three tags on a closed way + name + a start_date I'd assume the latter applies to the place_of_worship... no, actually I wouldn't be sure. Programs using the data will have the same problem here, or they will assume it applies to all three, like "name", which will be wrong. Cheers _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk
