On Thu, Jan 01, 2009 at 11:01:48PM +0000, Andrew Chadwick (mailing lists) wrote: > People often ask what the various colons, underscores, semicolons and > whatnot mean within a tag. The answer is that there are no guidelines, > silly; just do what you want! But doesn't mean that de-facto conventions > haven't evolved over time anyway, so I've had a go at documenting them. > Could someone please review and let me know if I've missed anything > important? Better examples would be useful too. > > http://wiki.openstreetmap.org/wiki/Any_tags_you_like#Syntactic_conventions_for_new_tags > > Thanks. I bet you're all doing something completely different. > > (Actually, I like the colon syntax a lot. Wonder if it's worth > formalising that a bit more, saying that either order matters, or order > doesn't matter?)
Of course the order matters, otherwise its a different tag key. The Venn diagrams you describe are the wrong image, because sets are unordered. In most cases a colon is not a sign for a "meta-tag" as you describe there, but more of a "namespace". This is most often used for external data attached to imports. See for instance all the keys starting with "tiger:". Jochen -- Jochen Topf [email protected] http://www.remote.org/jochen/ +49-721-388298 _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk
