effective span of a TextBuffer's tag?

[Yotam Medini <ymedini actcom co il>]

Say a tag T with attributes such as 
   direction=gtk.TEXT_DIR_RTL
   justification=gtk.JUSTIFY_RIGHT
was set/applied to a range R = [iter_begin, iter_end).

Questions

1. Assuming no other tag was applied, is the text 
   after iter_end effected  by T?
   
2. If a text is inserted in the middle of  [iter_begin, iter_end)
   is it effected by the tag ?

3. When a text containing R is extracted and inserted (copy and paste) 
   elsewhere, does it carry any of T's attributes ?

-- yotam