Previous: Models, Conventions, and Formats Next: The Table of contents Frames User guide
2008 Unidata NetCDF Workshop for Developers and Data Providers > The "Classic" NetCDF Data Model

3.1 What Is a Data Model?
Data models are useful abstractions.

Formally, a data model has three parts (according to the Internet Engineering Task Force):

  1. A collection of data objects such as lists, tables, relations, ...
  2. A collection of operations that can be applied to the objects such as retrieval, update, subsetting, averaging, ...
  3. A collection of integrity rules that define the legal states (set of values) or changes of state (operations on values)

We will not be that formal. We will use simple Unified Modeling Language (UML) pictures

 


Previous: Models, Conventions, and Formats Next: The Table of contents Frames User guide
2008 Unidata NetCDF Workshop for Developers and Data Providers > The "Classic" NetCDF Data Model