diff --git a/src/core/lib/MagicCriteria.mjs b/src/core/lib/MagicCriteria.mjs
index b9193b1a..78497d08 100644
--- a/src/core/lib/MagicCriteria.mjs
+++ b/src/core/lib/MagicCriteria.mjs
@@ -1,3 +1,10 @@
+/**
+ * Constants for the entropy of text. 
+ *
+ * @author n1073645 [n1073645@gmail.com]
+ * @copyright Crown Copyright 2020
+ * @license Apache-2.0
+ */
 export const compressedToDecompressed = {
     input:  [6.5, 8],
     output: [3.5, 6]
diff --git a/src/core/lib/MagicObject.mjs b/src/core/lib/MagicObject.mjs
index 6fa0feed..736b2647 100644
--- a/src/core/lib/MagicObject.mjs
+++ b/src/core/lib/MagicObject.mjs
@@ -1,8 +1,12 @@
+/**
+ * An object used by magic to store the input/output criteria for valid operation results. 
+ *
+ * @author n1073645 [n1073645@gmail.com]
+ * @copyright Crown Copyright 2020
+ * @license Apache-2.0
+ */
 import OperationConfig from "../config/OperationConfig.json";
 
-/**
- * An object used by magic to store the input/output criteria for valid operation results.
- */
 class potentialOps {
 
     /**