|path = desire|
|Used on these elements|
|Tools for this tag|
|This tag page does not have a proposal (what's this?)|
This seems to be used by some people to mark a path as being a desire line (or desire path). Seeon Wikipedia.
It's probably useful to map only prominent/permanent desire lines. Currently it's used almost exclusively on the UK.
Note that desire lines are by definition unofficial, so the access rights may well be ambiguous.