Parameters

Inputs shown as controls on the dashboard and usable by name in expressions.

params:
  area_m2: { default: 60, min: 30, max: 150, step: 5, label: "Flat size, m²" }
  region: { default: Yerevan, options: [Yerevan, Shirak, Lori], label: Region }
  note: { default: "", label: "A note" }

Option	Meaning
`type`	`number`, `text` or `choice`. When left out: `choice` if `options` is given, `text` if `default` is text, otherwise `number`.
`default`	The value until someone changes it. Artifacts are taken with the defaults.
`label`	What the control is called.
`min`, `max`, `step`	Bounds and increment of a number.
`options`	The choices of a `choice` parameter.

A parameter is used by its name in expressions, in limit, and as a weight in score:

nodes:
  big_flats:
    from: flats
    filter: area >= area_m2