.. SPDX-License-Identifier: CC-BY-4.0
   Copyright 2026 The Linux Foundation

``()`` (parentheses for grouping)
=================================

Use parentheses, e.g. ``(`` and ``)``, to avoid confusion when grouping together more than two licenses in an expression. Parentheses may be nested.

For example:

``# SPDX-License-Identifier: Apache-2.0 AND (MIT OR BSD-3-Clause)``

indicates that the recipient (1) must comply with `Apache-2.0 <https://spdx.org/licenses/Apache-2.0.html>`__, *and also* (2) must comply with their choice of *either* `MIT <https://spdx.org/licenses/MIT.html>`__ or `BSD-3-Clause <https://spdx.org/licenses/BSD-3-Clause.html>`__.