ada-block-start-re

ada-block-start-re is a variable defined in `ada-mode.el'.
Its value is

"\\<\\(\\(?:begin\\|declare\\|e\\(?:lse\\|xception\\)\\|generic\\|loop\\|or\\|private\\|select\\)\\|\\(\\(limited\\|abstract\\|tagged\\)[ 	\n]+\\)*record\\)\\>"

Documentation:
Regexp for keywords starting Ada blocks.