Could you explain the relationship label in Datebase EDR? what is the meaning of those relationship labels and how to use them?

Regular Relationship Label Identi +0 to ot +o ++ to +o +0 to + + ot + ++ + H + + + + ot ++ ot # student stu-id stu-F-name stu-L-name otu atrast Regular Relationship Label 0+ Identifying Relationship Label FO + +0 ++ HO +0 Regular Entity to LO Weak Entity K ot Identifier ++ H ol Identifier Associative Entity Attribute Attribute Attribute ++ ++ ++ Attribute ++ * + Attribute Attribute Attribute Attribute Attribute O+ x -o! Attribute Attribute Attribute Relationships Attribute Entities + -O+ - Attribute Attribute ++ Instructions Copy elements to create your ERD Add attributes by RIGHT-CLICKING an existing attribute, then select DUPLICATE Submit your ERD by clicking FILE then EXPORT AS then PNG WARNING: Ed won't save your ERD. Regularly click FILE then SAVE for an editable format. department student dep id stu-id stu-F-name = dep-name dep-unitro HO stu-L-name dep-street dep-postcode dep-phone-extension stu-street dep-postcode stu-city stu-state stu-dob stu-unitno faculty teachers-department stu-gender date student course S-date e-date mark course faculty members E-Mem:10 F-mem-F-name F-mem-L-name F-mem-street -- F-mem-postcode F F-mem-city F-mem-state F-mem-dob F-mem-unitno -- F-mem-gender co.id co-name teacher course s-date e-date faculty Fac ID tac-name