() (parentheses for grouping)ΒΆ

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, and also (2) must comply with their choice of either MIT or BSD-3-Clause.