[OSM-dev] api0.6 - only one value per key?

Andreas Kalsch andreaskalsch at gmx.de
Sun Feb 1 00:36:08 GMT 2009


Stefan de Konink schrieb:
> Andreas Kalsch wrote:
>> I have implemented this in an experimental way and it makes sense in 
>> any way. Let me know, if you are interested in SQL. The effort to 
>> manage this is a little bit higher, but you have a consistent data 
>> model which is more lightweight and quicker for lookups (PK lookup is 
>> better than k/v lookup). What about this?
>
> If you want multiple keys you could also implement a :1..n scenario. 
> Therefore anything that actually supports multiple keys should know 
> semantics. 

As far as I know, the project to read map features from Wiki pages is 
the first thing which tries to include sematics for tags. The current 
OSM data model does not include any semantics for tags, does it?




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