In the past I have seen two different symbols for a zener diode. One shows the complete "Z" shape on the cathode, and one shows more of an "L" shape on the cathode (see images below):
What is the difference between these? Do they actually have different meanings, or are they two ways of showing the same thing? Perhaps one is European and one is American? I always thought that they were simply two ways of showing the same thing, but a coworker of mine questioned it and now I am looking for confirmation.