Modality

Modality (or mood) is a category used to indicate the attitudes on the part of the speaker towards the factual content of the utterance, e.g. uncertainty, definiteness, vagueness, possibility.

Natural language

In synthetic languages, the distinction between grammatical tense, aspect and mood is fuzzy and at times controversial. In order to avoid the problems concerning isolating these categories, which are often amalgamated in a single morpheme, the UNLarium proposes a single TAM (Tense-Aspect-Mood) typology, to be found here.

UNL

In UNL, modality is to be represented by attributes indicating propositional attitudes.