Andrew, anyway they are mapped in osm as addresses 
(ok special kind of addresses), and used in the way addresses usually used.

Addresses are still distinct as they was
There is only one building for Praha, 606
and only one building for Praha, Staroměstské náměstí, 11

Same story for Tallin:

There is only one "Tallinn, Pikk, 9"
and only one "Tallinn, Lai, 8"

But they both shares one building. 
And if I understand my Estonian colleagues,
both of them are official, at least both of them could be found in official GIS 
maaamet.

And I could add more countries and schemes and examples.
Addresses are distinct, POIs are distinct, buildings are distinct, 
but their conjunctions are not.

Maybe we just use term distinct for different things?

There are many ways to have distinct addresses, and distinct objects with one 
or more addresses
and If a developer have designed database with assumption that there could be 
only one address, 
and in real world he have found an object with two addresses, he have made
a wrong assumption, not the reality is wrong.


Mon, 19 Jan 2015 09:57:04 +0100 от Andrew Shadura <and...@shadura.me>:
>On 19 January 2015 at 05:54, Dmitry Kiselev < dkise...@osm.me > wrote:
>> So we have 2 millions things in OSM going against OSM modeling tradition:
>>  http://taginfo.openstreetmap.org/keys/addr%3Aconscriptionnumber
>> It's same story, two addresses for one object.
>> First: hn-street-city
>> Second: hn-city
>> Scheme is different, but principle is the same, two addresses for one object
>> via tags.
>
>Dmitry, this isn't true. Conscription number/street number is just a
>special sort of an address, it's not like two totally separate
>addresses. Yes, you can use a part of it to address a building
>(conscription number + optional street + optional locality name +
>city), but anyway the official address is still just one.
>
>-- 
>Cheers,
>  Andrew

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