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An input value to the plan created by an intent block.

Examples

A value can assign an explicit concept and value to the intent, as in this example from the refreshing content sample capsule:

action (CheckRideShareStatus) {
  type (Calculation)

  collect {
    input (activity) {
      type (Activity)
      min (Required)
      default-init {
        intent {
          goal: Activity
          value: Countdown (20)
        }
      }
    }
  }

  output (Activity)
}

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Frequently, you'll use a expression for the value rather than an explicit concept. In this example from the audio sample capsule, meowToPlay is a concept that specifies the sound to play; this intent passes the value of that concept to the PlayAudio action.

    computed-input (meow) {
      description (By passing in the AudioInfo object to the PlayAudio action, we ask the client to play our sound.)
      type (audioPlayer.Result)
      compute {
        intent {
          goal: audioPlayer.PlayAudio
          value: $expr(meowToPlay)
        }
      }
      hidden
    }

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You can also cast concept values to different types by explicitly declaring them. This example casts a viv.time.StartDate to a property in viv.time.dateTimeInterval.

match: viv.time.DateTimeInterval(dateTimeInterval)

intent {
  goal: viv.time.DateInterval
  value: viv.time.DateInterval {
    start:
      viv.time.StartDate {
        $expr(dateTimeInterval.start.date)
     }
  }
}

It's also possible to use an intent to assign explicit values to properties within structure concepts:

intent {
  goal: viv.time.DateInterval
  value: viv.time.DateInterval {
    start:
      viv.time.StartDate {
         year: viv.time.Year(2010)
         month: viv.time.Month(11)
         day: viv.time.Day(20)
      }
  }
}