[Tagging] Why creating a superroute type in relation when type=route does the work ?

[Vincent Pottier]

Hi,
I have seen relations tagged as type=superroute.

They are already a lot of relations tagged as route gathering other 
route relations. And I found no documentation about superroute 
explaining the use of this odd tag.

Is it a reason for the use of this new tag when the tag route seems 
doing the work ?
-- 
Vincent Pottier aka FrViPofm
and sorry for the noise made by the same post with an other account.