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2. Entity–relationship model - Wikipedia

   en.wikipedia.org/wiki/Entity–relationship_model

   An entity–relationship model (or ER model) describes interrelated things of interest in a specific domain of knowledge. A basic ER model is composed of entity types (which classify the things of interest) and specifies relationships that can exist between entities (instances of those entity types).

3. diagrams.net - Wikipedia

   en.wikipedia.org/wiki/Diagrams.net

   Its interface can be used to create diagrams such as flowcharts, wireframes, UML diagrams, organizational charts, and network diagrams. [5] diagrams.net is available as an online web app, and as an offline desktop application for Linux, macOS, and Windows. [5] Its offline application is built using the Electron framework.

4. Lucidchart - Wikipedia

   en.wikipedia.org/wiki/Lucidchart

   Lucidchart is a web-based diagramming application [2] that allows users to visually collaborate on drawing, revising and sharing charts and diagrams, and improve processes, systems, and organizational structures. [3] [4] [5] It is produced by Lucid Software Inc., based in Utah, United States [3] [6] and co-founded by Ben Dilts and Karl Sun. [7]

5. One-to-many (data model) - Wikipedia

   en.wikipedia.org/wiki/One-to-many_(data_model)

   In systems analysis, a one-to-many relationship is a type of cardinality that refers to the relationship between two entities (see also entity–relationship model). For example, take a car and an owner of the car. The car can only be owned by one owner at a time or not owned at all, and an owner could own zero, one, or multiple cars.

6. Data modeling - Wikipedia

   en.wikipedia.org/wiki/Data_modeling

   An entity–relationship model (ERM) is an abstract conceptual representation of structured data. Entity–relationship modeling is a relational schema database modeling method, used in software engineering to produce a type of conceptual data model (or semantic data model ) of a system, often a relational database , and its requirements in a ...

7. List of Unified Modeling Language tools - Wikipedia

   en.wikipedia.org/wiki/List_of_Unified_Modeling...

   ERD for MySQL, PostgresSQL UML Designer: Yes Yes Yes Un­known Any kind of languages as it is compatible with code generator tools like Eclipse UMLGenerators or Acceleo Any kind of languages supported by Eclipse UML Generators Eclipse Open source under EPL license, based on Eclipse, EMF, Sirius UMLet: No No No No No Java Eclipse, Visual Studio Code