+## Appendix D
+Open Publication License
+
+Version 1.0, 8 June 1999
+
+### D.1 Requirements on both unmodified and modified versions
+
+The Open Publication works may be reproduced and distributed in whole
+or in part, in any medium physical or electronic, provided that the
+terms of this license are adhered to, and that this license or an
+incorporation of it by reference (with any options elected by the
+author(s) and/or publisher) is displayed in the reproduction.
+
+Proper form for an incorporation by reference is as follows:
+
+Copyright (c) year by author’s name or designee. This material may be
+distributed only subject to the terms and conditions set forth in the
+Open Publication License, vx.y or later (the latest version is
+presently available at
+[http://www.opencontent.org/openpub/][http://www.opencontent.org/openpub/]).
+
+The reference must be immediately followed with any options elected by
+the author(s) and/or publisher of the document (see section D.6).
+
+Commercial redistribution of Open Publication-licensed material is
+permitted.
+
+Any publication in standard (paper) book form shall require the
+citation of the original publisher and author. The publisher and
+author’s names shall appear on all outer surfaces of the book. On all
+outer surfaces of the book the original publisher’s name shall be as
+large as the title of the work and cited as possessive with respect to
+the title.
+
+### D.2 Copyright
+
+The copyright to each Open Publication is owned by its author(s) or
+designee.
+
+### D.3 Scope of license
+
+The following license terms apply to all Open Publication works,
+unless otherwise explicitly stated in the document.
+
+Mere aggregation of Open Publication works or a portion of an Open
+Publication work with other works or programs on the same media shall
+not cause this license to apply to those other works. The aggregate
+work shall contain a notice specifying the inclusion of the Open
+Publication material and appropriate copyright notice.
+
+Severability. If any part of this license is found to be unenforceable
+in any jurisdiction, the remaining portions of the license remain in
+force.
+
+No warranty. Open Publication works are licensed and provided “as is”
+without warranty of any kind, express or implied, including, but not
+limited to, the implied warranties of merchantability and fitness for
+a particular purpose or a warranty of non-infringement.
+
+### D.4 Requirements on modified works
+
+All modified versions of documents covered by this license, including
+translations, anthologies, compilations and partial documents, must
+meet the following requirements:
+
+ 1. The modified version must be labeled as such.
+ 2. The person making the modifications must be identified and the
+ modifications dated.
+ 3. Acknowledgement of the original author and publisher if
+ applicable must be retained according to normal academic citation
+ practices.
+ 4. The location of the original unmodified document must be identified.
+ 5. The original author’s (or authors’) name(s) may not be used to
+ assert or imply endorsement of the resulting document without the
+ original author’s (or authors’) permission.
+
+### D.5 Good-practice recommendations
+
+In addition to the requirements of this license, it is requested from
+and strongly recommended of redistributors that:
+
+ 1. If you are distributing Open Publication works on hardcopy or
+ CD-ROM, you provide email notification to the authors of your
+ intent to redistribute at least thirty days before your
+ manuscript or media freeze, to give the authors time to provide
+ updated documents. This notification should describe
+ modifications, if any, made to the document.
+ 2. All substantive modifications (including deletions) be either
+ clearly marked up in the document or else described in an
+ attachment to the document.
+ 3. Finally, while it is not mandatory under this license, it is
+ considered good form to offer a free copy of any hardcopy and
+ CD-ROM expression of an Open Publication-licensed work to its
+ author(s).
+
+### D.6 License options
+
+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.
+
+ 1. 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.
+
+ To accomplish this, add the phrase “Distribution of substantively
+ modified versions of this document is prohibited without the
+ explicit permission of the copyright holder.” to the license
+ reference or copy.
+
+ 2. To prohibit any publication of this work or derivative works in
+ whole or in part in standard (paper) book form for commercial
+ purposes is prohibited unless prior permission is obtained from
+ the copyright holder.
+
+ To accomplish this, add the phrase “Distribution of the work or
+ derivative of the work in any standard (paper) book form is
+ prohibited unless prior permission is obtained from the copyright
+ holder.” to the license reference or copy.