Based on:
ttcn-syntax:
http://www.vim.org/scripts/script.php?script_id=753
Folds: If the variable "g:ttcn_fold" is defined (e.g. by ":let g:ttcn_fold = 1" in your .vimrc file), folds will automatically be defined for each {...} block.
Highlight: If the variable "g:ttcn_hl_naming_convention" (e.g. by ":let g:ttcn_hl_naming_convention = 1" in your .vimrc file), Language elements following generic naming conventions will be highlighted.
This is not standardized but noted on http://www.ttcn-3.org/NamingConventions.htm.
ttcn-indent:
http://www.vim.org/scripts/script.php?script_id=754
ttcn-ftplugin:
http://www.vim.org/scripts/script.php?script_id=793
You should put settings that are specific to TTCN in this file.
ttcn-dict:
http://www.vim.org/scripts/script.php?script_id=767
Keyword completion for TTCN-3.
In insert mode you hit ctrl-x ctrl-k to get suggestions of keywords that could complete the currently typed word.
Note: ctrl-x ctrl-k is the Vim built-in method for dictionary completion; check out vimtip #91 and vimtip #102 for cool stuff and adjustments you can make!
For information about TTCN-3, see http://www.etsi.org.