Chen EDR - Draw entity relationship diagrams (ER diagrams) easily with Edraw!
With an extensive set of library objects, Edraw is a perfect tool for database design and Chen ERD diagramming.
Draw entity relationship diagrams (ER
diagrams) easily with Edraw!
Edraw is a very easy-to-use and
intuitive database design tool and ER Diagram tool
which can save you hundreds of hours of work.
Edraw is not only an excellent
tool for ER Diagram, but also one that allows
you to design flowchart, program structures and create detailed HTML or PDF reports.
Free Download Chen ERD
Software and View All Templates
Symbols for Chen ERD
With an extensive set of library objects such as
entities, links, items, attributes, users, types, captions, inheritance,
references, boundaries, events, clouds etc., Edraw is a perfect tool for database
design and ERD diagramming.
You can also use Edraw to draw Chen ERD, Database model
diagram, Express-G, Martin ERD, ORD Diagram and a lot more.
With Edraw you can visually design schemas for leading
clients/servers and desktop databases. By graphically showing the relationships
between information tables stored in the database, diagrams help to
ensure that the database you are designing is accurate, complete and efficient. Edraw allows you to visually create Entity Relationship diagrams (ERD) for
various database systems.
Moreover, data flow between tables can also be easily
described by creating appropriate Data Flow Diagrams (DFD).
Cross-DBMS target compatibility allows you to design
once and use for all.
Examples of Chen ERD Diagram
Chen ERD Software and View All
Chen's original method is the basis for many writings on
ERDs. While the traditional aspects of entities and relationships are
represented as boxes and lines (respectively), there are a number of unique
attributes to his present method:
- The cloud symbol represents aggregations of smaller
ER diagrams, in the context of a logical design (as opposed to a physical
- The double-box stands for a weak entity, which is
dependent on its parent entity.
- A diamond symbol represents a type of relationship.
- Relationship adornments are added adjacent to the
lines to indicate connectivity (I, M, N) and cardinality.
- The data-structure diagram (an alternate form of
the ERD) uses arrows to show I:M relationships.
- Circles symbolizes the attributes of an entity,
although Visio labels this icon as value.
- A human figure represents a user icon.