reftex-index-phrases-phrase-regexp12

reftex-index-phrases-phrase-regexp12 is a variable defined in `reftex-index.el'.
Its value is

"^\\(\\S-?\\)\\(	\\)\\([^\n	]*\\S-\\)\\(\\(	[ 	]*\\)\\([^\n	]*\\S-\\)\\)?[ 	]*$"

• This variable may be risky if used as a file-local variable.

Documentation:
Regular expression matching all types of phrase lines.