Relationship to AppDir specification at docs.appimage.org/reference/appdir.html?

There is no hint which one overrules the other, while some content is contradicting.

Examples:
* icon file as "PNG with 256x256 or 512x512 pixels" vs. "in the best available quality, ideally a vector graphic"
* "SHOULD contain exactly one $APPNAME.desktop file in its root directory with $APPNAME being the name of the payload application" vs. "The name of the file doesn’t matter, as long as it carries the .desktop extension."
* "MAY contain an $APPNAME.png file in its root directory" vs. "These four types of entries MUST be contained in the AppDir" (one type being myapp.)