Slot: value_presence
if true then a value must be present (for lists there must be at least one value). If false then a value must be absent (for lists, must be empty)
Domain and Range
SlotDefinition → 0..1 presence_enum
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Children
Used by
Other properties
Comments: | if set to true this has the same effect as required=true. In contrast, required=false allows a value to be present |