On 24/08/15 18:56, François Lacombe wrote:
Hi Mateusz,
It seems this tag is a combination of waterway=canal and disused=yes.
I'm not so in favor of such value (derelict_canal). There are two
different information in one value.
I think that 'disused=yes' is a dangerous tag and should be avoided.
Suppose someone uses foo=bar + disused=yes. Someone else searches for
foo=bar, he will find the objects with and without disused=yes. If he
doesn't notice he will treat the disused the same as the active objects.
It means every time anyone searches for or selects anything he must also
select not(disused=yes). Using a different style of tag (e.g.
disused:foo=bar) avoids this problem as foo=bar is quite different from
disused:foo=bar.
--
Cheers, Chris
user: chillly
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