[rejschaap]

The SQL example should probably be expanded with encoding. It is quite common to see HTML encoded strings in databases. Which is problematic if you want to present the data in a non-HTML context such as a CSV-file.

The text also doesn't explicitly about which direction the dependencies should go. Though the diagram hints at some asymmetry, I am not sure whether this is intentional. For instance I try to make my HTML oblivious to both CSS and JS. But they of course know about the structure of the HTML, to respectively present and manipulate the content.