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"Chen's notation for entity–relationship modeling uses rectangles to represent entity sets, and diamonds to represent relationships appropriate for first-class objects: they can have attributes and relationships of their own. If an entity set participates in a relationship set, they are connected with a line.
Attributes are drawn as ovals and are connected with a line to exactly one entity or relationship set.
Cardinality constraints are expressed as follows:
- a double line indicates a participation constraint, totality or surjectivity: all entities in the entity set must participate in at least one relationship in the relationship set;
- an arrow from entity set to relationship set indicates a key constraint, i.e. injectivity: each entity of the entity set can participate in at most one relationship in the relationship set;
- a thick line indicates both, i.e. bijectivity: each entity in the entity set is involved in exactly one relationship.
- an underlined name of an attribute indicates that it is a key: two different entities or relationships with this attribute always have different values for this attribute.
Attributes are often omitted as they can clutter up a diagram; other diagram techniques often list entity attributes within the rectangles drawn for entity sets." [Entity–relationship model. Wikipedia]
The vector stencils library ERD, Chen's notation contains 13 symbols for drawing entity-relatinship diagrams using the ConceptDraw PRO diagramming and vector drawing software.
The example "Design elements - ER diagram (Chen notation)" is included in the Entity-Relationship Diagram (ERD) solution from the Software Development area of ConceptDraw Solution Park.
Chen's ERD
Chen's ERD, week key attribute, weak entity, relationship, multivalue attribute, key attribute, identifying relationship, entity, derived attribute, attribute, associative entity,
Used Solutions

Basic Bar Graphs, bar chart Basic Bar Graphs

Basic Bar Graphs, bar chart
This solution enhances ConceptDraw PRO v10.3.0 (or later) with templates, samples and a library of vector stencils for drawing Bar Graphs.
The vector stencils library "Transport map" contains 96 pictograms for drawing transport maps.
Use it in your spatial infographics for visual representation of transport schemes and plans as metro maps in the ConceptDraw PRO diagramming and vector drawing software extended with the Spatial Infographics solution from the area "What is Infographics" of ConceptDraw Solution Park.
Train Railway
Train Railway, train railway,
Bus Stop
Bus Stop, bus stop,
Tramlink
Tramlink, tramlink,
Marina/Ferry Dock
Marina/Ferry Dock, marina dock, ferry dock,
Information Center
Information Center, information center,
Information Center
Information Center, information center,
Airport
Airport, airport,
Airport
Airport, airport,
Underground/Subway/Metro
Underground/Subway/Metro, underground, subway, metro, tube,
Underground/Subway/Metro
Underground/Subway/Metro, underground, subway, metro, tube,
National Rail Train Station
National Rail Train Station, National Rail Train Station,
Taxi
Taxi, taxi,
Taxi
Taxi, taxi,
Parking
Parking, parking,
Parking
Parking, parking,
Parking
Parking, parking, car parking,
Parking
Parking, parking, car parking,
Bicycle Parking
Bicycle Parking, bicycle parking,
Bicycle Parking
Bicycle Parking, bicycle parking,
Fuel/Gas/Petrol
Fuel/Gas/Petrol, fuel, gas, petrol,
Fuel/Gas/Petrol
Fuel/Gas/Petrol, fuel, gas, petrol,
Police
Police, police,
Police
Police, police,
Hospital
Hospital, hospital,
Hospital
Hospital, hospital,
Wheelchair Access
Wheelchair Access, wheelchair access,
Wheelchair Access
Wheelchair Access, wheelchair access,
First Aid
First Aid, first aid,
First Aid
First Aid, first aid,
Telephone
Telephone, telephone,
Telephone
Telephone, telephone,
Post Office
Post Office, post office,
Post Office
Post Office, post office,
Landmarks and Museums
Landmarks and Museums, landmarks, museums,
Landmarks and Museums
Landmarks and Museums, landmarks, museums,
University
University, university,
University
University, university,
Shopping/Supermarket
Shopping/Supermarket, shopping, supermarket,
Shopping/Supermarket
Shopping/Supermarket, shopping, supermarket,
Cafe
Cafe, cafe,
Cafe
Cafe, cafe,
Food and Drinks
Food and Drinks, food, drinks,
Food and Drinks
Food and Drinks, food, drinks,
Man
Man, man,
Woman
Woman, woman,
Restrooms/Toilets
Restrooms/Toilets, restrooms, toilets,
Restrooms/Toilets
Restrooms/Toilets, restrooms, toilets,
Park
Park, park,
Park
Park, park,
Zoo
Zoo, zoo,
Zoo
Zoo, zoo,
Hotel
Hotel, hotel,
Hotel
Hotel, hotel,
Camping
Camping, camping,
Camping
Camping, camping,
City
City, city,
Skyscraper
Skyscraper, skyscraper,
Building
Building, building,
Ocean
Ocean, ocean, sea,
Straight River
Straight River, river,
Flexible River
Flexible River, river,
Bridge
Bridge, bridge,
North Arrow
North Arrow, North arrow,
Viewpoint
Viewpoint, viewpoint,
Scale
Scale,
Road line
Road line, road,
Road rounded line
Road rounded line, road,
Road corner
Road corner, road,
Road curve 1
Road curve 1, road,
Road curve 2
Road curve 2, road,
Crossroads
Crossroads, crossroads,
Roundabout
Roundabout, roundabout,
Cloverleaf interchange
Cloverleaf interchange, cloverleaf interchange,
Roadway break
Roadway break, roadway break,
Railway line
Railway line, railway,
Railway curve
Railway curve, railway,
Railway fork
Railway fork, railway,
Standard line with standard station - basic road
Standard line with standard station - basic road, line, station, road,
Thick line with standard station - basic road
Thick line with standard station - basic road, line, station, road,
Standard line with rectangular station - basic road
Standard line with rectangular station - basic road, line, station, road,
Thick line with rectangular station - basic road
Thick line with rectangular station - basic road, line, station, road,
Standard line with standard station - double road
Standard line with standard station - double road, line, station, road,
Thick line with standard station - double road
Thick line with standard station - double road, line, station, road,
Standard line with rectangular station - double road
Standard line with rectangular station - double road, line, station, road,
Thick line with rectangular station - double road
Thick line with rectangular station - double road, line, station, road,
Standard line with standard station - dotted road
Standard line with standard station - dotted road, line, station, road,
Thick line with standard station - dotted road
Thick line with standard station - dotted road, line, station, road,
Standard line with rectangular station - dotted road
Standard line with rectangular station - dotted road, line, station, road,
Thick line with rectangular station - dotted road
Thick line with rectangular station - dotted road, line, station, road,
Interchange Station Vertical
Interchange Station Vertical, interchange station,
Interchange Station Horizontal
Interchange Station Horizontal, interchange station,
Transfer Station 1
Transfer Station 1, transfer station,
Transfer Station 2
Transfer Station 2, transfer station,
Transfer Station 3
Transfer Station 3, transfer station,
Line Notation
Line Notation, line,
Street direction
Street direction, street, direction,
Used Solutions
HelpDesk

How to Connect Objects in ConceptDraw PRO on PC

ConceptDraw PRO for PC - connecting objects
ConceptDraw PRO provides a few options for drawing connections between objects: Direct Connectors, Smart, Arc, Bezier, Curve and Round Connectors. You can connect objects in your ConceptDraw diagram with proper connectors using the embedded automatic connection modes. This article describes how you can connect objects with connectors and how you can ascribe different types and behaviors.
Arrow 10 Technology
Arrow 10 Technology