diff --git a/transformations/README.MD b/transformations/README.MD
new file mode 100644
index 0000000..9b967bf
--- /dev/null
+++ b/transformations/README.MD
@@ -0,0 +1,22 @@
+# 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)
+)
+```
+