[Mapcss] Example for "set"

[Simon Legner]

Hi Bjoern

On Fri, May 12, 2017 at 2:05 AM, Bjoern Hassler <bjohas+mw at gmail.com> wrote:
> Would somebody be able to give an example, ideally in overpass-turbo, for
> the following:

Think of them as a label you attach to the matched objects in order to
refer to exactly those objects later on. You can find a few examples
in JOSM's style [1] as well as validation rules (search for "set " in
the files).

Simon

[1] https://github.com/openstreetmap/josm/blob/mirror/styles/standard/elemstyles.mapcss
[2] https://github.com/openstreetmap/josm/blob/mirror/data/validator/geometry.mapcss