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Added a README stub to the transformations folder.

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Bernhard Wally 2020-05-01 22:42:25 +02:00
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# Transformations
The following rules have been applied in order to create PDDL files from IEC 62264 production system models.
## Metamodel Concepts
Metamodel concepts of IEC 62264 are being converted to a set of PDDL type specifications and predicates. Relevant elements are those that appear within a given IEC 62264 model. Unused elements are not translated in order to reduce file size and increase performance and readability.
* IEC 62264 elements (e.g., `Equipment`, `Equipment Class`) are being converted to types.
* IEC 62264 relations (e.g., `Equipment` can be classified by [0..*] `Equipment Classes`) are being converted to predicates.
For the above mentioned examples, the IEC 62264 concepts are being translated from
```mermaid
classDiagram
Equipment --> "0..*" Equipment Class : classifiedBy >
```
to
```
(:types EquipmentClass Equipment)
(:predicates
(EquipmentClassed ?E - Equipment ?C - EquipmentClass)
)
```