Linguistic modality includes necessity (also known as deontic modality, abbreviated in the values as Deon) and possibility, each with a situational (objective, fact-based) and an epistemic (subjective, speaker-specific) variant. Epistemic necessity indicates that the certainty of the information described is based on the speaker’s personal opinion. Epistemic necessity can be expressed through the use of verbal affixes or clitics, verbal constructions (such as periphrasis), and other markers, such as particles, adverbials, nouns, adjectives, and phrase- or clause-level clitics. These strategies may serve multiple functions, in addition to expressing epistemic necessity.
EpsDeonAff: Epistemic necessity is expressed through the use of verbal affixes.
EpsDeonV: Epistemic necessity is expressed through the use of verb constructions.
EpsDeonElse: Epistemic necessity is expressed through a strategy other than verbal affixes and verb constructions.
When a language displays more than one strategy, multiple values can be listed. If one strategy is dominant, a slash (/) can separate the two values, with the dominant value appearing first; if neither is dominant, they are listed with an ampersand (&) separating the two.
 Example of situational necessity: I have to go. Example of epistemic necessity: He has to be here (= I think he is here). Situational possibility refers to a situation in which an agent is either capable of an action, allowed to perform it, or faces no objective obstruction from performing it. Epistemic possibility refers to a situation assumed by the speaker.
 Consider the following example: It’s so late she must be home by now (= I’m sure she’s home).
 This value applies even if the use of verb affixes is not the only strategy available in the language for the expression of epistemic necessity.
 This should be detailed in the commentary.