diff --git a/source/FingerBoard-Core/FBParallelActivation.class.st b/source/FingerBoard-Core/FBParallelActivation.class.st
index 84283a7..538567f 100644
--- a/source/FingerBoard-Core/FBParallelActivation.class.st
+++ b/source/FingerBoard-Core/FBParallelActivation.class.st
@@ -3,7 +3,8 @@ Class {
 	#superclass : #FBBaseActivation,
 	#instVars : [
 		'values',
-		'arguments'
+		'arguments',
+		'metadata'
 	],
 	#category : #'FingerBoard-Core-Model'
 }
@@ -24,9 +25,40 @@ FBParallelActivation >> arguments [
 ]
 
 { #category : #initialization }
-FBParallelActivation >> initializeValues: anInteger [ 
+FBParallelActivation >> initializeValues: anInteger [
+
 	arguments := Array new: anInteger.
-	values := Array new: anInteger
+	values := Array new: anInteger.
+	metadata := Array new: anInteger.
+]
+
+{ #category : #'as yet unclassified' }
+FBParallelActivation >> metadataAt: key ifAbsent: aBlock [
+
+	^ (self metadataAtIndex: executor index) at: key 
+		ifAbsent: aBlock
+]
+
+{ #category : #'as yet unclassified' }
+FBParallelActivation >> metadataAt: key put: anObject [ 
+
+	(self metadataAtIndex: executor index) at: key 
+		put: anObject
+]
+
+{ #category : #'as yet unclassified' }
+FBParallelActivation >> metadataAtIndex: index [
+
+	^ (metadata at: index) ifNil: [
+		  metadata at: index put: (FBActivationMetadata new
+				   schema: self metadataSchema;
+				   activation: self;
+				   yourself) ]
+]
+
+{ #category : #initialization }
+FBParallelActivation >> metadataSchema [
+	^ node metadataSchema
 ]
 
 { #category : #printing }