Refinement
Use of VDM starts with a very abstract model and develops this into an implementation. Each step involves Data Reification, then Operation Decomposition.
Data reification develops the abstract data types into more concrete data structures, while operation decomposition develops the (abstract) implicit specifications of operations and functions into algorithms that can be directly implemented in a computer language of choice.
| Specification | Implementation | |
|---|---|---|
| Abstract data type | ––– Data reification → | Data structure |
| Operations | ––– Operation decomposition → | Algorithms |
Read more about this topic: Vienna Development Method
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