The E-R Diagram:

E-R diagrams are used to graphically express an E-R Model

• Rectangles represent entity sets

• Ellipses represent attributes.

• Diamonds represent relationships among entity sets

• Lines link attributes to entity sets and entity sets to relationships

On the right hand side of this page you can see a sample E-R diagram.

Click at "Show Solution" to see a description of the E-R diagram..

 

---

Source: http://www.cs.sfu.ca/CC/354/zaiane/material/notes/Chapter1/node7.html