One sort-of attempt at this is GNU's Coding Standards. Long and Short Options: https://www.gnu.org/prep/standards/html_node/Option-Table.html#Option-Table http

One sort-of attempt at this is GNU's Coding Standards. Long and Short Options: https://www.gnu.org/prep/standards/html_node/Option-Table.html#Option-Table https://www.gnu.org/prep/standards/html_node/Option-Table.ht... General Interfaces: https://www.gnu.org/prep/standards/html_node/User-Interfaces.html#User-Interfaces https://www.gnu.org/prep/standards/html_node/User-Interfaces... Command Line Interfaces: https://www.gnu.org/prep/standards/html_node/Command_002dLine-Interfaces.html https://www.gnu.org/prep/standards/html_node/Command_002dLin... Program Argument Syntax: http://www.gnu.org/software/libc/manual/html_node/Argument-Syntax.html http://www.gnu.org/software/libc/manual/html_node/Argument-S...