# ORM Diagram Symbols

Pre-drawn ORM diagram symbols represent entity, value, unary, binary, vertical binary, ternary, quaternary, index annotation, mandatory constraint, etc. These symbols help create accurate diagrams and documentation.

ORM diagram templates offer you plenty of special shapes, entity, value, unary, binary, vertical binary, ternary, quaternary, exclusion constraint, frequency constraint, index annotation, mandatory constraint, equality constraint, etc. All these shapes will greatly help you draw the ORM diagram you want.

### ORM Diagram Symbols

**ORM Diagram Shapes**

**Entity** in a database could be a single person, place, or thing about which data can be stored.

**Unary** means consisting of or involving a single component or element.

**Ternary** means "composed of three items".

**Index annotation** defines an index for the class as a whole (typically a composite index).

Constraint is optimization problem that the solution must satisfy. There are several types of constraints in ORM, **exclusion
constraint**, **frequency constraint**, **P constraint**, **ring constraint**, etc.

Various kinds of **backgrounds** are available here in Edraw software, and they will surely make your diagrams more attractive.

Need fresh looking ORM diagram symbols for your design? These ORM diagram symbols are a cinch to pop in. And their crisp, fine detail will make spectacular, easy-to-understand diagrams and presentations to your customers.

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