{
  "title": "Variable",
  "description": "A variable is a reference to a value that can be used in the UI.",
  "type": "string",
  "anyOf": [
    {
      "type": "string",
      "pattern": "^\\$[a-zA-Z0-9_]+$"
    },
    {
      "type": "string",
      "pattern": "^#[a-zA-Z0-9_]+$"
    },
    {
      "type": "string",
      "pattern": "^\\(.*\\)$"
    }
  ],
  "examples": ["$variable", "($variable)"]
}