The identifier of the instrument.
{ "$schema": "https://json-schema.org/draft/2020-12/schema", "$id": "#/components/schemas/instrument_id", "title": "instrument_id", "type": "string", "description": "The identifier of the instrument.", "minLength": 1, "maxLength": 256, "pattern": "^[A-Za-z0-9-_.+=]+$" }