A few years ago I was attenting a conference for frontend web developers about good UX/UI with focus on how buttons in online shops should behave.
In my hand written notes I found the following: DIN ISO 9241-11 (Usability: effective, efficient and satisfactory)
Now I sadly can not really find helpful information on google on how this ISO norm connects to good website UX/UI. I did find this: http://www.uml.org.cn/jiaohu/pdf/s1022.pdf which talks about the basics of Usability.
But this got me thinking, is there a international norm which I could use as base for a style guide? Or did someone already do so?
I am not only interested in web design but also in windows applications. Ideally answers reference german or english sources.