Why is this mapping deleting text?

Question

I'm using these two binding for indentation and dedentation of a visual selected block of text.

" Indentation
vmap <TAB>  >gv

" Dedentation
vmap <S-TAB>    <gv

When I dedent with my binding everything is fine, but if I try to indent with <Tab> the text gets deleted. I am not using any plugins and this is my vimrc:

"-----------------------------------------------
" my .VIMRC, the root                           |
"-----------------------------------------------
" only if not set before:
" use vim-defaults instead
" of vi-defaults (easier, more user friendly)
if &compatible          
  set nocompatible      
endif

syntax on
set relativenumber  " hybrid
set number      " hybrid
set mouse=a

set shell=/bin/bash 

"case-insensitive searching
set ignorecase      
set smartcase

" Disable audible/visual bells
set noerrorbells
set novisualbell
set t_vb=

" setting formating stuff
set tabstop=4
set shiftwidth=4
set autoindent

"show matching pairs -> () [] {}
set showmatch

" copy to clipboard
noremap <C-y> "+y  

" paste from clipboard
noremap <C-p> "+p  

" Indentation
vmap <TAB>  >gv

" Dedentation
vmap <S-TAB>    <gv

The version I'm using is VIM - Vi IMproved 9.0 . Does anyone have the same problem or have an idea where the root of this problem is?

Answer 1

Instead of using vmap which is recursivly and works in select- and visual-mode, I switched to xnoremap which isn't recursivly and restricts to only visual mode. Now it works fine!