What do the entity-relationship diagram (ERD) symbols used in DBeaver mean? I don't understand the ERDs used by DBeaver. The diamonds and dots at the ends of the line arent the crow's foot I'm used to. I've googled the subject and checked the docs but can't find a straight-forward answer. 

Is there a reference for the style used? What do these symbols mean?

Please see the image below:
I found something while putting together this question. It seems the current standard used is IDEF1x, according to this github issue.

I found a PDF cheat sheet with the following content showing all the relationships: