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The author(s) and/or publisher of an Open Publication-licensed document may elect certain options by appending language to the reference to or copy of the license. These options are considered part of the license instance and must be included with the license (or its incorporation by reference) in derived works.

A. To prohibit distribution of substantively modified versions without the explicit permission of the author(s). ‘Substantive modification’ is defined as a change to the semantic content of the document, and excludes mere changes in format or typographical corrections (...)

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Comments The following are advantages of the license:
 * Freedom of use is declared. However, the license places freedom of choice by an author above freedom of use by the public, thus giving authors the right to limit use.