Is known

saturn:is_known

Checks whether an expression has a known value.

An information expression only reads the PlayerView passed in. Raw numbers, strings and booleans can be used directly as constants; operand objects must have a type. See Player information.

JSON fields

Field	Type	Required	Default	Description
type	Resource ID	yes	—	saturn:is_known
value	Expression	yes	—	Value or expression used by this type.

JSON example

{
  "type": "saturn:is_known",
  "value": {
    "type": "saturn:getter",
    "getter": {
      "type": "saturn:health"
    }
  }
}

This is a value to embed in the corresponding field, not a standalone loadable data pack file. The example: references in the examples must be replaced with defined entries.

Java entry point

com.iafenvoy.saturn.data.information.expression.builtin.IsKnownExpression. This page is based on the Codec in the current 26.1.2 source.