UML class diagram relationship use strange symbols

Question

I have such a childish problem. I have such a class diagram and the main problem is that I have never seen this type of uml class notation. Therefore, at the moment I am at a loss as to what these signs mean. And until I find out, I can't really start doing anything. If someone could explain them, I would be very grateful or direct me to where I can read more about these signs.

Answer 1

This is simply not UML but ERD (Entity Relationship Diagram). See also Wikipedia

As Christophe mentioned, yours is crow's foot notation while Wikipedia is using Chen's. More about the notation above in this SO answer as Geert Bellekens found out.