[OSM-talk] Changes to Key:access wiki page

[Christiaan Welvaart]

hi,

On Sat, 22 Aug 2009, Tobias Knerr wrote:

>> I listed :backward and :forward postfixes for access keys
>
> What you are doing here seems like picking raisins from conditional
> tagging and trying to handle it as a special case. I'm not sure whether
> you are aware of my proposal?
>
> http://wiki.openstreetmap.org/wiki/Proposed_features/Conditions_for_access_tags

I didn't really answer this question yet. My idea with :forward and 
:backward was to group all access restrictions - keys that take 
yes/no/destination/private/etc. - with the access key. So I also sometimes 
write e.g. access:vehicle:forward=no . But time restrictions should also 
be included, e.g. as :T<from>-<to>, so one could write (crazy) things 
like:

   access:vehicle:forward:Tmo-fr=destination
   access:vehicle:forward:Tsa-su=yes
   access:vehicle:backward:Tmo-fr=delivery
   access:vehicle:backward:Tsa-su=no

A problem with oneway= is that it cannot accept the whole range of access 
values - only yes/no. So the above cannot be done with :oneway AFAICT.

(max)height/weight/width/speed could maybe also be included with access, 
but I think it is better to treat them as "access limits" and keep them 
separate. Then the conditions proposal looks good for these keys.


     Christiaan