The LHS of a help Rule for a '$opt$' options is its corresponding '$opt$' help holder name (such as '$opt$doShow', '$opt$doDebug', '$arg$pac$myOpt'). The RHS is an Association with the listed keys.
The '$k$' keys for simplicity (because used so often) bend the usual Webel recommendations slightly, in that the keys for $k$help$', '$k$warn$', '$k$tip$', '$k$lab$' etc. do not explicitly indicate that their values are Strings (so not $k$$help$', '$k$$warn$', '$k$$tip$', '$k$$lab$' etc.).
The key '$k$help' maps from '$info$opt$', which may appear slightly inconsistent, but note that '$info$opt$' is used in other contexts, and in this context, it provides a help String.
For '$opt$' options, the optional '$k$mult$' UML/SysML-style multiplicity indicator String (used only for documentation) - which maps from '$mult$opt$' - is rarely used.
For '$opt$' options, the optional pattern helper key '$k$pat' - which maps from ''$pat$opt$' - is also rarely used.
For examples of use visit: