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PDFIO License

Intention and Guidelines

The software does not distinguish between academic research from commercial applications. The purposes of both activities should not get defeated in using this software. However, the authors and creators of this software must be given the due recognition they deserve. The software has been made available under the MIT Expat License keeping with the stated intention. We also believe:

  1. Any integration with any other software or implementation of any features that may reduce the flexibility of the research community or commercial usage of the original software or affect the authors' moral rights on the original software, is discouraged.
  2. We presume your usage of this software is for purposes that's legal and morally aligned to the country of your operations, stakeholders and customers and world community in general.
  3. The functionalities of this software should not be used to overcome technical restrictions imposed on a document like Digital Rights Management (DRM), or remove such restrictions, unless you have the legal access and rights over the document that permits you to do so.
  4. The above conditions do not apply to activities that are permissible as fairuse under the law and can be carried out using this software.

If your intentions are aligned to the guidelines above, you can use the software under the following license.

License Text

The PDFIO.jl package is licensed under the MIT "Expat" License:

Copyright (c) 2017-2019: Sambit Kumar Dash.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

PDFIO is dependent on packages like AbstractTrees, AdobeGlyphList, BinaryBuilder, Documenter, LabelNumerals, Rectangle, RomanNumerals, ZipFile that use similar licenses.

LZW Decompression

The author has provided an own implementation of the LZW decompression clearly believing the older patents are no longer in force. Excerpts from reference article from GNU Website provided here for reference:

There is no special patent threat to GIF format nowadays as far as we know; the patents that were used to attack GIF have expired. Nonetheless, this article will remain pertinent as long as programs can be forbidden by patents, since the same sorts of things could happen in any area of computing. See our web site policies regarding GIFs, and our web guidelines.

...

We were able to search the patent databases of the USA, Canada, Japan, and the European Union. The Unisys patent expired on 20 June 2003 in the USA, in Europe it expired on 18 June 2004, in Japan the patent expired on 20 June 2004 and in Canada it expired on 7 July 2004. The U.S. IBM patent expired 11 August 2006. The Software Freedom Law Center says that after 1 October 2006, there will be no significant patent claims interfering with the use of static GIFs.

Animated GIFs are a different story. We do not know what patents might cover them. However, we have not heard reports of threats against use of animated GIFs. Any software can be threatened by patents, but we have no reason to consider animated GIFs to be in particular danger — no particular reason to shun them.

Licenses of third party libraries or data

OpenSSL

This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit. (http://www.openssl.org/)

OpenSSL is licensed under Apache License 2.0 for version 3.x and above. The detailed license can be found at: https://github.com/openssl/openssl/blob/master/LICENSE

Since, PDFIO can work with OpenSSL 1.1.0 the license can be seen at:

https://github.com/openssl/openssl/blob/OpenSSL11_0-stable/LICENSE which will be the license for all the 1.x versions of OpenSSL.

Zlib

The software links with Zlib library for certain decompression modules. The license for the same can be found at: https://www.zlib.net/zlib_license.html

Also stated here for reference:

/* zlib.h – interface of the 'zlib' general purpose compression library version 1.2.11, January 15th, 2017

Copyright (C) 1995-2017 Jean-loup Gailly and Mark Adler

This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software.

Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:

  1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
  2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
  3. This notice may not be removed or altered from any source distribution.

Jean-loup Gailly Mark Adler jloup@gzip.org madler@alumni.caltech.edu

*/

Adobe Font Metrics

The software utilizes Adobe Fonts Metrics data files which are included under the following license terms:

This file and the 14 PostScript(R) AFM files it accompanies may be used, copied, and distributed for any purpose and without charge, with or without modification, provided that all copyright notices are retained; that the AFM files are not distributed without this file; that all modifications to this file or any of the AFM files are prominently noted in the modified file(s); and that this paragraph is not modified. Adobe Systems has no responsibility or obligation to support the use of the AFM files.

Adobe Glyph List

The software utilizes Adobe Glyph List (AGL & AGL-FN) glyph codes that can be used under the following license terms:

Copyright 2002, 2010, 2015 Adobe Systems Incorporated. All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

Neither the name of Adobe Systems Incorporated nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.