[talk-au] Multi-value tags

[John Henderson]

John Smith wrote:
> 2010/1/7 John Henderson <snowgum at gmx.com>:
>> I notice that multi-values can be used with some tags.  For example, a
>> road with two names (eg, local name and highway name) can have both
>> names listed in the name tag separated by a semi-colon.
> 
> Actually we are trying to reduce this from happening by moving the
> highway information, not the highway=* tag to a relation to reduce the
> clutter and make things more efficient to parse.
> 
>> Can the same trick be used generally?
> 
> Yes, but you are better to use a relation to group ways into routes,
> rather than trying to cram everything into the same tags.
> 
>> The Bicentennial National Trail is primarily a horse route.
>> Secondarily, it is a hiking route (as well as a mountain bike route).
> 
> If you try and load too much info into the same tags it probably won't
> render, use a relation instead and it might, or you may need to nudge
> someone to get it to render but using a relation is more likely to
> render than trying to get complex tag parsing to occur.
> 
>> Is "route=horse;hiking" valid syntax?
> 
> Yes, but it's unlikely to render.

Thanks John.

How might I use a relation to generate multiple route tags (given that 
route tags are already within a relation)?

John H