Top-Level Keys

ESC defines two top-level keys that are available to environment authors: imports and values.

• imports: This top-level key is a list of other environments that this environment imports. Imported environments are evaluated and merged to form the basis for the current environment, which is then evaluated and merged with the imported values. For more information, see the imports reference.
• values: This top-level key defines the contents of the environment–i.e. the values that this environment will produce when evaluated. For more information, see the values reference.