Data models can be implemented using numerous data representation and storage formats, including arrays, linked lists, stacks, and graphs (e.g hierarchical trees). The hierarchical tree is very efficient in representing repetitive and hierarchical data and is typically associated with routing or switching platform configurations. Therefore it is the most common data model format used for networking platforms.
(Source: https://developer.cisco.com/docs/nx-os/#!the-nature-of-data-models)
Data models enable data to be easily structured, grouped, and replicated to represent information related to network devices, features, and solutions.
from:
https://developer.cisco.com/docs/nx-os/#!the-nature-of-data-models
Data modeling is the process of creating a visual representation of either a whole information system or parts of it to communicate connections between data points and structures
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