Polarity

The UMR Guidelines treat polarity in two ways:

propositional negation is annotated within the modal dependency annotation at the document level), and
the polarity attribute (adopted from AMR) marks any morphosyntactic indicators of negation within a sentence (which do not necessarily signal semantic negation!!)

[en] unhealthy food (3-3-3 (1a))

(t/ thing
	:ARG1-of (e/ eat-01)
	:mod (h/ healthy
		:polarity -))

ad food-related discussion:

[en] 3-2-1-1 (6a) He gave the cat some wet food.

He gave the cat some wet food.
(g/ give-01  
	:actor (p/ person
		:ref-person 3rd
		:ref-number Singular)  
	:theme (f/ food
		:mod (w/ wet)
		:quant (s/ some))  
	:recipient (c/ cat
		:ref-number Singular)
	:aspect Performance
	:modstr FullAff)