PNG Reference Library version 2

This is a reading of the license PNG Reference Library version 2. It covers Software. Version 2 of the model.

1. What you may do

This license permits the following.
Change license. Replacing the license of the work, or of an adaptation, with another license, or changing its terms.
Charge distribution fee. Charging a fee for the act of providing a copy of the work to someone else.
Commercial use. Using the work to generate income, directly or indirectly, for example by selling it or by using it in advertising.
Derivative works. Distributing an adaptation of the work and making it available to the public.
Derive. Creating a new work from the work, such as a translation, adaptation or arrangement of it or of a part of it.
Display. Showing the work to the public without making a copy the viewer keeps.
Distribute. Providing copies of the work to the public or to anyone else.
Modified works. Distributing a modified version of the work that does not amount to a new, derivative work.
Modify. Altering the work, for example by updating it, without creating a new work; an alteration that creates a new work is Derive.
Present. Performing the work in public, including by broadcast or other communication to the public.
Reproduce. Making copies of the work in any form.

2. What you must do

These conditions come with the permissions above.
Use a compliant license. Choosing a replacement license that stays compliant with the terms of the original license. It is a condition of change license.
Modification notice. Marking a changed work as changed, saying how it differs from the original and keeping earlier notices of change. It is a condition of derive.
Notice. Notice: keeping the license and copyright notices with every copy. It is a condition of derive.
Rename. Giving a modified or derived work a name that tells it apart from the original. It is a condition of derive.
Notice. Notice: keeping the license and copyright notices with every copy. It is a condition of distribute.
Modification notice. Marking a changed work as changed, saying how it differs from the original and keeping earlier notices of change. It is a condition of modify.
Notice. Notice: keeping the license and copyright notices with every copy. It is a condition of modify.
Rename. Giving a modified or derived work a name that tells it apart from the original. It is a condition of modify.

3. Further terms

The license states these terms about itself.
Validity period: Perpetual.
Region: Worldwide.

4. Warranty, liability and support

The license carries the following clauses, quoted from the model.
Warranty disclaimer: The software is supplied "as is", without warranty of any kind, express or implied, including, without limitation, the warranties of merchantability, fitness for a particular purpose, title, and non-infringement.
Limitation of liability: In no event shall the Copyright owners, or anyone distributing the software, be liable for any damages or other liability, whether in contract, tort or otherwise, arising from, out of, or in connection with the software, or the use or other dealings in the software, even if advised of the possibility of such damage.
Additional clauses: 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.

This text was generated from the machine readable model of the license. It is not legal advice, and only the license itself is binding.