User blog comment:Googleaarex/Make an extension of the notation/@comment-5029411-20140926211035/@comment-25371339-20140926212622

Also, names:

Extension 0 is Bar Notation

Extension 1 is Multi-Bar Notation

Extension 2 is Multiple Bar Notation

Extension 3 is Arrow Bar Notation

Extension 4 is Second-level Arrow Bar Notation

Extension 5 is Third-level Arrow Bar Notation

Extension 6 is Multi-level Arrow Bar Notation

Extension 7 is Parentheses Arrow Bar Notation

Extension 8 is Multiple Parentheses Arrow Bar Notation

Extension 9 is Bar Parentheses Arrow Bar Notation

Extension 10 is Linear Bar Parentheses Arrow Bar Notation

Extension 11 is Planar Bar Parentheses Arrow Bar Notation