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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. List of Unified Modeling Language tools - Wikipedia

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

   Includes glossary, data dictionary, and issue tracking. Supports use case diagrams, auto-generated flow diagrams, screen mock-ups, and free-form diagrams. clang-uml: Un­known Un­known Un­known Un­known No C++ PlantUML, Mermaid.js Generate PlantUML and Mermaild.js diagrams from existing C++ codebase. Dia: Partly No No No

4. Dia (software) - Wikipedia

   en.wikipedia.org/wiki/Dia_(software)

   Dia has special objects to help draw entity-relationship models, Unified Modeling Language (UML) diagrams, flowcharts, network diagrams, and simple electrical circuits. It is also possible to add support for new shapes by writing simple XML files, using a subset of Scalable Vector Graphics (SVG) to draw the shape.

5. List of concept- and mind-mapping software - Wikipedia

   en.wikipedia.org/wiki/List_of_concept-_and_mind...

   General-purpose freeware diagram editor; Can be used to draw different kinds of diagrams: flowcharts, computer network diagrams, UML diagrams, BPMN diagrams, mind maps, organization charts, entity relationship diagrams and many others; Mind42: Proprietary: Mind mapping: Web browser: Yes Yes Yes Browser-based collaborative web application

6. IDEF1X - Wikipedia

   en.wikipedia.org/wiki/IDEF1X

   Three levels of view are defined in IDEF1X: entity relationship (ER), key-based (KB), and fully attributed (FA). They differ in level of abstraction. The ER level is the most abstract. It models the most fundamental elements of the subject area - the entities and their relationships. It is usually broader in scope than the other levels.

7. List of SysML tools - Wikipedia

   en.wikipedia.org/wiki/List_of_SysML_tools

   Name Underlying data model Full and Latest SysML support Full and Latest UML support XMI Automated document generation OSLC support Can be integrated with Astah: Yes Partial ...

8. C4 model - Wikipedia

   en.wikipedia.org/wiki/C4_model

   Code diagrams (level 4): provide additional details about the design of the architectural elements that can be mapped to code. The C4 model relies at this level on existing notations such as Unified Modelling Language (UML) , Entity Relation Diagrams (ERD) or diagrams generated by Integrated Development Environments (IDE) .

9. Barker's notation - Wikipedia

   en.wikipedia.org/wiki/Barker's_notation

   Barker's notation refers to the ERD notation developed by Richard Barker, Ian Palmer, Harry Ellis et al. whilst working at the British consulting firm CACI around 1981. The notation was adopted by Barker when he joined Oracle and is effectively defined in his book Entity Relationship Modelling as part of the CASE Method series of books.