On 13.06.2012 16:12, Martin Vonwald wrote: > If you use a different character (like the ? in the 1.5) > it would be clear where the conditions start.
That's a valid argument, but we need to be aware that there is already a lot of existing tagging that uses a colon as the condition separator. These are usually examples with just a single condition, things like maxspeed:wet, :hgv, :forward, :backward, ... I also doubt whether the distinction between a "subkey" and a "condition" would always be obvious to mappers. > Didn't know about that too. And it has the same problem: > maxspeed:lanes:hgv:wet=60|50|40 > > Where does the condition begin? Again this is not obvious. Small change: > maxspeed:lanes?hgv:wet=60|50|40 That's interesting, I would have assumed that the tag should look like maxspeed:hgv:wet:lanes to allow for per-lane fallbacks. For example, if there is only one lane that changes maxspeed when wet, one might want to write that as follows: maxspeed:lanes = 80|80|80 maxspeed:lanes?wet = ||50 Yes, you could evaluate this without any knowledge about the semantics of the base key. But doing so would result in "the value of 'maxspeed:lanes' is '||50' when the road is wet". That's not actually what we want - we do want the keep the '80' for the first two lanes. Tobias _______________________________________________ Tagging mailing list Tagging@openstreetmap.org http://lists.openstreetmap.org/listinfo/tagging
