ER Diagram - Symbol Definition

[pmp]

Hi!
I am new to DBeaver (version Windows 3.5.8). I am also new to Java using Netbeans developing a small windows app for my wife's business.
I found the Diagram tab in DBeaver and it will serve as a good graphic for my database schema, however, I don't understand the symbols being used to link tables.
One is a dot "•" and the other a diamond shape "◊". The database symbols I am used to are the crows foot (many) and the bar (one).
Can you please define the symbols use din DBeaver.
Thanks
Peter