syn match kpl_action "[?@#`]"
hi def link kpl_action Special

syn match kpl_operator "[$%~!&*\-+=|:<,>/]\|\.\.\|`[a-z]\w*" contains=@NoSpell
hi def link kpl_operator Operator

syn match kpl_todo contained "\<TODO\>" contains=@NoSpell
syn match kpl_comment_line "\/\/.*$" contains=kpl_todo
syn region kpl_comment_range start="/\*" end="\*/" contains=kpl_todo
hi def link kpl_todo TODO
hi def link kpl_comment_line Comment
hi def link kpl_comment_range Comment

syn match kpl_semicolon ";"
hi def link kpl_semicolon Removed

syn match kpl_number "\%(\d_\d\|\d\)\+\%(\.\%(\d_\d\|\d\)\+\)\?"
hi def link kpl_number Number

syn match kpl_character "'\\\?.'" contains=@NoSpell
hi def link kpl_character Added

syn region kpl_string start=/"/ skip=/\\\\"/ end=/"/
hi def link kpl_string String

syn match kpl_var "[a-z]\w\{0,49}" contains=@NoSpell
hi def link kpl_var Ignore

syn match kpl_ignore "\<_\>"
hi def link kpl_ignore Comment

syn match kpl_constant "_\w\{1,49}" contains=@NoSpell
hi def link kpl_constant Constant

syn match kpl_type "[A-Z]\w\{0,49}" contains=@NoSpell
hi def link kpl_type Type

syn match kpl_tag "\.\w\{1,50}"
hi def link kpl_tag Identifier

syn match kpl_block "[{}]"
hi def link kpl_block Function

syn match kpl_collection "[()]"
hi def link kpl_collection Directory

syn match kpl_modifier "\[\|\]"
hi def link kpl_modifier Changed