Is the abreviation 'Doz' equivalent/interchangeable to 'Prof'? I'm doing a PhD in Austria and I noticed that people are a bit weird around titles so I'm adapting to it. I also saw that some use the abbreviation Doz (Dozent) and others Prof (Professor). Are these equivalent/interchangeable? 

I've read this wikipedia page where it says:


  Docent is also used at some (mainly German) universities generically for a person who has the right to teach.


So I thought maybe it's the difference between actively being a professor and being able to teach, but later it says: 


  In Germany, Austria and in the German-speaking part of Switzerland, Dozent or Hochschuldozent denotes an academic appointment at a university or similar institution, at a mid-level ranking of seniority. 


So is it related to seniority? Do you first become a Doz and then a Prof?
A "Dozent" is just someone who teaches / gives lectures.

This means every Professor/Prof. is a "Dozent" (if he teaches).

But not every "Dozent" is a Professor (e.g. some people who are working in industry and give lectures as a side job or people who just haven´t made it to "Prof" yet.)