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2. Hierarchical database model - Wikipedia

   en.wikipedia.org/wiki/Hierarchical_database_model

   A hierarchical database model is a data model in which the data is organized into a tree-like structure. The data are stored as records which is a collection of one or more fields . Each field contains a single value, and the collection of fields in a record defines its type .

3. Database model - Wikipedia

   en.wikipedia.org/wiki/Database_model

   Hierarchical database model; This is the oldest form of database model. It was developed by IBM for IMS (information Management System), and is a set of organized data in tree structure. DB record is a tree consisting of many groups called segments. It uses one-to-many relationships, and the data access is also predictable. Network model ...

4. Warnier/Orr diagram - Wikipedia

   en.wikipedia.org/wiki/Warnier/Orr_diagram

   A Warnier/Orr diagram (also known as a logical construction of a program/system) is a kind of hierarchical flowchart that allows the description of the organization of data and procedures. They were initially developed 1976, [ 1 ] in France by Jean-Dominique Warnier [ 2 ] and in the United States by Kenneth Orr [ 3 ] on the foundation of ...

5. C4 model - Wikipedia

   en.wikipedia.org/wiki/C4_model

   The viewpoints are organized according to their hierarchical level: [2] [3] Context diagrams (level 1): show the system in scope and its relationship with users and other systems; Container diagrams (level 2): decompose a system into interrelated containers. A container represents an application or a data store;

6. Structured analysis and design technique - Wikipedia

   en.wikipedia.org/wiki/Structured_Analysis_and...

   Structured analysis and design technique (SADT) is a systems engineering and software engineering methodology for describing systems as a hierarchy of functions. SADT is a structured analysis modelling language, which uses two types of diagrams: activity models and data models.

7. Chord diagram (information visualization) - Wikipedia

   en.wikipedia.org/wiki/Chord_diagram_(information...

   A chord diagram is a graphical method of displaying the inter-relationships between data in a matrix. The data are arranged radially around a circle with the relationships between the data points typically drawn as arcs connecting the data. The format can be aesthetically pleasing, making it a popular choice in the world of data visualization.