# Parameter

> Identity of a measured parameter. vocabulary is welldot (the core parameter vocabulary), cas (a CAS Registry Number, always the substance itself in mg/L) or an x-… custom vocabulary (which then requires unit).

> **Parameter** = `object`

Identity of a measured parameter. `vocabulary` is `welldot` (the core
parameter vocabulary), `cas` (a CAS Registry Number, always the substance
itself in mg/L) or an `x-…` custom vocabulary (which then requires `unit`).

## Properties

### code

> **code**: `string`

***

### vocabulary

> **vocabulary**: `string`