As others have said, connecting lines / branches / tags are not required. These folders do not really matter for subversion, it's just the best practice that you can use if it suits your needs.
TortoiseSVN, : , /tags . , ( ).
( ):
, "trunk", "branch" "tags" . (, ) :
- trunk, .
- () / (, , 1.0, 1.1, 2.0).
- , . 2, 1.0 ( 1.0 ).
( , , ) "" . , - ( , , "/tags/1.0", ).
TortoiseSVN , , ( , ).