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What is “Network Model”?
A network modelling is a process of representing a database model that is planned as a flexible method for representing the objects in the database, and their interrelationships. Through this modelling technique, a software developer could establish the relationship between any two objects clearly.
An exclusive feature of the network model is its schema, which is observed as a diagram where relationship types are represented as arcs and object types are depicted through nodes.
Another important aspect of this database model is that unlike the schema of other the network models, it is not confined to be a matrix or hierarchy; in this hierarchical tree, it is replaced by a graph, which permits for more basic networks with the nodes.
Benefits of Network Model
The famous American computer scientist Charles Bachman proposed the concept of network model for the first time in 1969. The Conference on Data Systems Languages (CODASYL) Consortium standardized the network model for common use and also as a tool of software development. The second publication was introduced in 1971, which later turned into the basis for virtually all implementations.
Some of the benefits of network model are as follows:
As a whole, the network model substitutes the hierarchical tree with a graph or diagram allowing more wide-ranging connections amongst the nodes. The fundamental difference of the network model from the hierarchical model, is its ability to define many to many relations elaborately. In other words, it permits a record to have more than one parent. In many situations, in an organizational set-up an employee works for two departments or more departments at a time. Any measure of the strict hierarchical model is not applicable in this condition. The strict hierarchical model is not possible and the hierarchical tree is more generalized. The network model is very much applicable in this unconventional environment. A network structure allows one: one, one: many, many: many relationships among entities.
While learning lesson on network model, computer science students also come to know about its various drawbacks:
Some well-known database system that frequently uses network model system is as follows:
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