User-Defined Table Types Documentation in SQL Server 2012 -

i tried find documentation user-defined table types in sql server 2012 find 2008 r2 documentation here.

i know can used in sql server 2012 should considered them bad practise or obsolete if there no documentation sql server 2012?

user defined table types in 2012 , 2014. in ssms under programmability/types , see tab user defined table types.