The only professional modeling tool that gives you 100% accurate, textbook-perfect Chen notation – including double rectangles for weak entities, double diamonds for identifying relationships, proper cardinality labels, and full attribute support – all with drag-and-drop ease.
The Chen Entity-Relationship Diagram (ERD) is a foundational model that graphically represents the structure of a database, focusing on entities (things of interest), attributes (details about the entities), and the crucial relationships between them.
The model is renowned for its use of distinct geometric shapes-rectangles for entities, ovals for attributes, and diamonds for relationships-making the conceptual data model intuitive and easy to understand.
