On 20/05/19 22:20, Valor Naram wrote:
then it's a property
Yes.
The tag highway=residential says that is a road here, a physical presence.
The tag surface=grass says that whatever is here has a grass surface,
but does not say what the physical presence is.
If there is a thing tagged with both highway=residential and
surface=grass then it says there is a road with a grass surface.
For change tables they would commonly be combined with toilets, possibly
other things too like libraries, community halls, camp sites etc.
So the description of surface does not say what the physical presence
is, nor should change table. For change table it is the provision of the
activity.
-------- Original Message --------
Subject: Re: [Tagging] Feature Proposal - RFC - changing table
From: Martin Koppenhoefer
To: "Tag discussion, strategy and related tools"
CC:
Am Mo., 20. Mai 2019 um 12:36 Uhr schrieb Valor Naram
<valin...@gmx.net <mailto:valin...@gmx.net>>:
> [...] so if you intend to replace this, yours would likely
become a property (only) as well
Ok. Does it matter? From what I understood so far most wiki
pages describe `properties` e.g.: Key `highway`
the difference of a feature and a property is that a property
cannot be tagged alone, it requires a feature (e.g. "surface", or
"oneway", or "height"). On the other hand, a feature is defining a
"thing", e.g. a highway defined through the tag "highway". It is
not a property, but a feature (and the values are different
"classes" of this feature).
OSM does actually not explicitly make this distinction (AFAIK),
but it is implicit in how people are using the tags.
Cheers,
Martin
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