% Variable type
boolean
numeric
pair
path
pen
picture
string
transform

% Argument type
expr
primary
secondary
suffix
tertiary
text

----------------------------------------------------

[
	["comment", "% Variable type"],
	["type", "boolean"],
	["type", "numeric"],
	["type", "pair"],
	["type", "path"],
	["type", "pen"],
	["type", "picture"],
	["type", "string"],
	["type", "transform"],

	["comment", "% Argument type"],
	["type", "expr"],
	["type", "primary"],
	["type", "secondary"],
	["type", "suffix"],
	["type", "tertiary"],
	["type", "text"]
]

----------------------------------------------------

Checks for typing keywords.