The options a format declares

Looks up x (a path, or a bare extension) in the single-mode registry and returns the entry's declared option specs, or an empty list when the format declares none – which is the answer for most formats, and the reason a block should ask rather than assume.

Usage

format_options(x)

Arguments

x

Character. A file path or a bare extension.

Value

Named list of format_opt specs, possibly empty.