[Tagging] kind of a shop=ticket

[k4r573n]

Hi,

I wonder how to map the kind of a ticket shop.
It would be practical to see ticket shops for concerts on a culture map
and such shops for aerialway on a skiing map.

for now I've 2 ideas

tickets:ski=yes/no
tickets:concert=yes/no
tickets:public_transport=yes/no
...

or

ticket=ski
ticket=concert
ticket=public_transport
ticket=...

tagwatch lists
49 entries of ticket=*
48 entries of tickets=*
15 entries of tickets:public_transport=*
16 entries of tickets:bus=*
10 entries of tickets:subway=*

this wiki page [1] recommends to use tickets:*=*

What should I document in the wiki?
_______
Karsten

[1] http://wiki.openstreetmap.org/wiki/RU:Tag:shop=ticket