improved terms

Author: thomasWeise

LICENSE.md

@@ -11,6 +11,7 @@ The list of files not under the CC BY‑NC‑SA 4.0 license bu
 + the [Python](https://www.python.org) Logo, e.g.,
     - text/main/introduction/pythonLogo.pdf
     - text/main/introduction/pythonLogo.svg
++ all screenshots from websites
 
 
 ## creative commons

README.md

@@ -64,6 +64,7 @@ The list of files not under the CC BY‑NC‑SA 4.0 license bu
 + the [Python](https://www.python.org) Logo, e.g.,
     - text/main/introduction/pythonLogo.pdf
     - text/main/introduction/pythonLogo.svg
++ all screenshots from websites
 
 You can download its newest version of the course material from <https://thomasweise.github.io/databases>.
 This version may change since this course and book both are work in progress.

text/front/preface/preface.tex

@@ -19,7 +19,7 @@ \chapter*{Preface}%
 Materials that the author~(Thomas Weise) has created by himself and such that have been created by others.
 The vast majority of the material is teaching material created by the author.
 This and only this material is released under the \emph{Attribution-NonCommercial-ShareAlike~4.0 International license}~(\href{http://creativecommons.org/licenses/by-nc-sa/4.0}{\mbox{CC~BY-NC-SA~4.0}}).
-However, the book also includes some images and figures created by others, which are marked explicitly and licensed under their authors' terms.
+However, the book also includes some images and figures created by others, such as logos and screenshots and more, which are marked explicitly and licensed under their authors' terms.
 For example, all logos and trademarks are under the copyright of their respective owners.
 
 You can cite this book~\cite{databases}, e.g., by using the following Bib\TeX:%