What about highway?
I would like to start a discussion about what extra tags are/should-be/will-be useful in addition to just piste:type=*. Currently, in the absence of any highway=* tag, then ski trails such as piste:type=nordic are absoluteley not shown in OpenStreetMap. I know that the rule is "don't tag for the renderer", but still, this is OpenStreetMap.org's own renderer which never shows ski trails (save if also a highway)...
In general I add highway=construction, construction=service/path & winter_road=yes : this causes the trail to be marked as a dashed line (by OpenStreetMap.org itself, for example, mainly due to highway=construction). When editing the map details, then the winter_road=yes makes it (slightly more) obvious that there is no all-year road in that location.
Can we please have some discussion on this issue so that a consensus may be reached, and then respected by all. Perhaps then others will stop removing these tags, as soon as I have finished adding them... --Neil Dewhurst, Lyon France (talk) 09:27, 23 March 2015 (UTC)
I just discovered "missing" trails in Peter Lougheed Provincial park, Alberta, Canada. I was about to add them from my GPS track data. They were already there but missing a highway= tag. The trails that do show up on the map are tagged highway=path (the trails are walking or cycling trails in the summer. David Dermott (talk) 20:37, 1 January 2016 (UTC)