the codice_6 attribute does not always have to literally describe the contents of the image. keep in mind the purpose and context of the image and what would be useful to someone who cannot see it. the alt attribute is supposed to be an "alternative" for the image, usually stating its purpose. for example, an image of a warning sign should not have alt text “a triangle with a yellow background, black border and an exclamation mark”, but simply “warning!”—unless, of course, the image's purpose is to show what the warning symbol actually looks like.