diff --git a/examples/2-in-depth/2-3-sub-processes/handle-payment.bpmn b/examples/2-in-depth/2-3-sub-processes/handle-payment.bpmn
index 818b9738..4e19c066 100644
--- a/examples/2-in-depth/2-3-sub-processes/handle-payment.bpmn
+++ b/examples/2-in-depth/2-3-sub-processes/handle-payment.bpmn
@@ -2,10 +2,13 @@
 <bpmn:definitions xmlns:bpmn="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:dc="http://www.omg.org/spec/DD/20100524/DC" xmlns:di="http://www.omg.org/spec/DD/20100524/DI" xmlns:spiffworkflow="http://spiffworkflow.org/bpmn/schema/1.0/core" id="Definitions_96f6665" targetNamespace="http://bpmn.io/schema/bpmn" exporter="Camunda Modeler" exporterVersion="3.0.0-dev">
   <bpmn:process id="Handle_Payment" name="Handle Payment" isExecutable="true">
     <bpmn:ioSpecification>
-      <bpmn:dataOutput id="DataOutput-623753916-1" name="success" />
-      <bpmn:inputSet />
+      <bpmn:dataInput id="cost" name="cost" />
+      <bpmn:dataOutput id="success" name="success" />
+      <bpmn:inputSet>
+        <bpmn:dataInputRefs>cost</bpmn:dataInputRefs>
+      </bpmn:inputSet>
       <bpmn:outputSet>
-        <bpmn:dataOutputRefs>DataOutput-623753916-1</bpmn:dataOutputRefs>
+        <bpmn:dataOutputRefs>success</bpmn:dataOutputRefs>
       </bpmn:outputSet>
     </bpmn:ioSpecification>
     <bpmn:startEvent id="StartEvent_1">
@@ -89,6 +92,12 @@ First, we select whether the user wants to pay online or pay when the order is d
   </bpmn:process>
   <bpmndi:BPMNDiagram id="BPMNDiagram_1">
     <bpmndi:BPMNPlane id="BPMNPlane_1" bpmnElement="Handle_Payment">
+      <bpmndi:BPMNShape id="DataInput-956220638-1DI" bpmnElement="cost">
+        <dc:Bounds x="-8" y="-35" width="36" height="50" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="0" y="22" width="21" height="14" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNShape>
       <bpmndi:BPMNShape id="_BPMNShape_StartEvent_2" bpmnElement="StartEvent_1">
         <dc:Bounds x="12" y="92" width="36" height="36" />
       </bpmndi:BPMNShape>
@@ -115,7 +124,7 @@ First, we select whether the user wants to pay online or pay when the order is d
       <bpmndi:BPMNShape id="Activity_1ai9w8p_di" bpmnElement="Activity_11ph807">
         <dc:Bounds x="420" y="180" width="100" height="80" />
       </bpmndi:BPMNShape>
-      <bpmndi:BPMNShape id="DataOutput-623753916-1DI" bpmnElement="DataOutput-623753916-1">
+      <bpmndi:BPMNShape id="DataOutput-623753916-1DI" bpmnElement="success">
         <dc:Bounds x="592" y="-5" width="36" height="50" />
         <bpmndi:BPMNLabel>
           <dc:Bounds x="590" y="52" width="41" height="14" />