---
title: Domain
editUrl: https://github.com/Cratis/Screenplay/edit/main/Documentation/screenplay/domain.md
description: A .play file can declare the domain it belongs to. The domain is a qualified name that groups related files — typically the name of the business domain a…
---

A `.play` file can declare the domain it belongs to. The domain is a qualified name that groups related files — typically the name of the business domain a bounded context sits in.

## Syntax

```screenplay
domain <Qualified.Name>
```

## Rules

- **Optional** — a file without a `domain` line belongs to no domain.
- **At most one per file** — a second `domain` line is a compile error.
- **First in the file** — the declaration must appear before everything else, including imports.

## Example

```screenplay
domain Sales

import Customers.CustomerRegistered

module Invoicing
  ...
```

An `import` with an unquoted, qualified name names a contract from another bounded context. To bring in other `.play` files of the same application, quote a path or glob instead - see [Imports](/screenplay/imports/).