I noted today a number of post boxes with two apertures, one for stamped mail, the other for franked mail. Each side of the box has a separate plate & distinct refs.I would have expected these to have been mapped as "ref=RF1 1;RF1 2", with some explanatory text to explain that this is one & the same post-box.
I find that one such has been mapped as two nodes placed directly on top of each other: - https://www.openstreetmap.org/node/1149760519 - https://www.openstreetmap.org/node/1149765602 This is not wholly unreasonable, there are functionally two different posting places located in a single post box. It also shows that the OSM tag name which is perfectly accurate about 99.99% of the time, isn't totally precise. (Complete aside: This is the sort of PITA I was always experiencing in db-design; and equally business folk always will tell you the equivalent of "all post from one post box is treated the same". In the extreme form you get US software firms writing banking systems which don't acknowledge that more than one currency exists). Anyway I look to Robert to cut this Gordian Knot one way or the other. Jerry
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