diff --git a/src/Miro/GridGraphList.class.st b/src/Miro/GridGraphList.class.st
index fd0bc3b..7e38828 100644
--- a/src/Miro/GridGraphList.class.st
+++ b/src/Miro/GridGraphList.class.st
@@ -73,6 +73,6 @@ GridGraphList >> renderObjectOn: html graph: aGraphId [
 	| miroPlot |
 	miroPlot := (MiroPlot allReportKinds
 		detect: [ :report | report displayName = aGraphId ]) new.
-	miroPlot useRoassal.
+	miroPlot useChartJS.
 	html render: miroPlot
 ]
diff --git a/src/Miro/MiroData.class.st b/src/Miro/MiroData.class.st
new file mode 100644
index 0000000..4d054df
--- /dev/null
+++ b/src/Miro/MiroData.class.st
@@ -0,0 +1,5 @@
+Class {
+	#name : #MiroData,
+	#superclass : #Object,
+	#category : #'Miro-Data'
+}
diff --git a/src/Miro/MiroListOfPoints.class.st b/src/Miro/MiroListOfPoints.class.st
new file mode 100644
index 0000000..d6cedfb
--- /dev/null
+++ b/src/Miro/MiroListOfPoints.class.st
@@ -0,0 +1,8 @@
+Class {
+	#name : #MiroListOfPoints,
+	#superclass : #MiroData,
+	#instVars : [
+		'points'
+	],
+	#category : #'Miro-Data'
+}
diff --git a/src/Miro/MiroListOfSingleValues.class.st b/src/Miro/MiroListOfSingleValues.class.st
index acb8bb3..e7f3d9a 100644
--- a/src/Miro/MiroListOfSingleValues.class.st
+++ b/src/Miro/MiroListOfSingleValues.class.st
@@ -1,6 +1,6 @@
 Class {
 	#name : #MiroListOfSingleValues,
-	#superclass : #Object,
+	#superclass : #MiroData,
 	#instVars : [
 		'data',
 		'labels'
diff --git a/src/Miro/MiroPoint.class.st b/src/Miro/MiroPoint.class.st
new file mode 100644
index 0000000..eec8d95
--- /dev/null
+++ b/src/Miro/MiroPoint.class.st
@@ -0,0 +1,38 @@
+Class {
+	#name : #MiroPoint,
+	#superclass : #MiroData,
+	#instVars : [
+		'values'
+	],
+	#category : #'Miro-Data'
+}
+
+{ #category : #initialization }
+MiroPoint >> addValue: aMiroValue [
+	values  add: aMiroValue.
+	^aMiroValue
+
+]
+
+{ #category : #accessing }
+MiroPoint >> dimension [
+	"Dimension of a point"
+	^ values size
+]
+
+{ #category : #initialization }
+MiroPoint >> initialize [
+	super initialize .
+	values := OrderedCollection new
+
+]
+
+{ #category : #accessing }
+MiroPoint >> values [
+	^ values
+]
+
+{ #category : #accessing }
+MiroPoint >> values: aCollection [
+	values := aCollection
+]
diff --git a/src/Miro/MiroValue.class.st b/src/Miro/MiroValue.class.st
new file mode 100644
index 0000000..0fd3651
--- /dev/null
+++ b/src/Miro/MiroValue.class.st
@@ -0,0 +1,35 @@
+Class {
+	#name : #MiroValue,
+	#superclass : #MiroData,
+	#instVars : [
+		'value'
+	],
+	#category : #'Miro-Data'
+}
+
+{ #category : #accessing }
+MiroValue class >> value: aMiroValue [
+	^ self new value:  aMiroValue;
+	yourself 
+
+]
+
+{ #category : #testing }
+MiroValue >> isLabel [
+	^ (self value isNumber) not
+]
+
+{ #category : #testing }
+MiroValue >> isNumber [
+	^ self value isNumber 
+]
+
+{ #category : #accessing }
+MiroValue >> value [
+	^ value
+]
+
+{ #category : #accessing }
+MiroValue >> value: anObject [
+	value := anObject
+]
diff --git a/src/MiroTest/MiroPointTest.class.st b/src/MiroTest/MiroPointTest.class.st
new file mode 100644
index 0000000..c8985e2
--- /dev/null
+++ b/src/MiroTest/MiroPointTest.class.st
@@ -0,0 +1,22 @@
+Class {
+	#name : #MiroPointTest,
+	#superclass : #TestCase,
+	#category : #'MiroTest-Data'
+}
+
+{ #category : #tests }
+MiroPointTest >> testDimension [
+	"comment stating purpose of message"
+	|mp|
+	mp := MiroPoint new.
+	self assert: mp dimension equals: 0.
+	mp addValue: MiroValue new.
+	self assert: mp dimension equals: 1.
+]
+
+{ #category : #test }
+MiroPointTest >> testValues [
+
+	self flag: #toImplement.
+	self assert: false
+]
diff --git a/src/MiroTest/MiroValueTest.class.st b/src/MiroTest/MiroValueTest.class.st
new file mode 100644
index 0000000..396c7fe
--- /dev/null
+++ b/src/MiroTest/MiroValueTest.class.st
@@ -0,0 +1,33 @@
+Class {
+	#name : #MiroValueTest,
+	#superclass : #TestCase,
+	#category : #'MiroTest-Data'
+}
+
+{ #category : #testing }
+MiroValueTest >> testIsLabel [
+	"comment stating purpose of message"
+	|mv|
+	mv := MiroValue new.
+	mv value: 'lab1'.
+	self assert: mv isLabel equals: true.
+]
+
+{ #category : #testing }
+MiroValueTest >> testIsNumber [
+	"comment stating purpose of message"
+	|mv|
+	mv := MiroValue new.
+	mv value: 'label'.
+	self assert: mv value isNumber equals: false.
+	mv value: 12.
+	self assert: mv value isNumber equals: true
+]
+
+{ #category : #test }
+MiroValueTest >> testValue [
+	|mv|
+	mv := MiroValue new.
+	mv value: 'label'.
+	self assert: mv value equals: 'label'
+]