the menu at the top of the page looks like a database diagram. It isn't crows foot, so what is it?
It kind of looks like the way I map my queries out...but I use a combination of the UML and the Database templates in dia.
Looking back, the main place I see this discussed previously is as part of our graduation proces:
It seems the designer drew inspiration from various ER diagram types. One answer there (not from the designer) mentions "crows feet connectors".
Perhaps Jin will remember more and post a more complete answer here.
It's a load of CSS and HTML, so it's actually off-topic for this site.