diff --git a/input/fsh/examples/grouping-example.fsh b/input/fsh/examples/grouping-example.fsh
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+// In an oncology prescription, in a multiline setting, a prescription with 3 lines is created
+// Each line has a unique identifier, and a group identifier that links them together, and additionally a RequestOrchestration.
+
+Instance: PrescriptionLine1
+InstanceOf: MedicationRequest
+* subject.identifier.value = "patient1"
+* identifier
+  * system = "http://example.com/NamingSystem/prescriptionlines"
+  * value = "line1"
+* groupIdentifier
+  * system = "http://example.com/NamingSystem/prescriptions"
+  * value = "prescr1"
+* status = #active
+* intent = #option
+* medication.concept = #med1
+
+
+
+Instance: PrescriptionLine2
+InstanceOf: MedicationRequest
+* subject.identifier.value = "patient1"
+* identifier
+  * system = "http://example.com/NamingSystem/prescriptionlines"
+  * value = "line2"
+* groupIdentifier
+  * system = "http://example.com/NamingSystem/prescriptions"
+  * value = "prescr1"
+* status = #active
+* intent = #option
+* medication.concept = #med1
+
+
+
+Instance: PrescriptionLine3
+InstanceOf: MedicationRequest
+* subject.identifier.value = "patient1"
+* identifier
+  * system = "http://example.com/NamingSystem/prescriptionlines"
+  * value = "line3"
+* groupIdentifier
+  * system = "http://example.com/NamingSystem/prescriptions"
+  * value = "prescr1"
+* status = #active
+* intent = #option
+* medication.concept = #med1
+
+
+
+
+
+Instance: RequestOrchestration1
+InstanceOf: RequestOrchestration
+* subject.identifier.value = "patient1"
+* identifier
+  * system = "http://example.com/NamingSystem/requestorchestration"
+  * value = "prescr1"
+
+* groupIdentifier
+  * system = "http://example.com/NamingSystem/prescriptions"
+  * value = "prescr1"
+
+* status = #active
+* action[0].resource = Reference(PrescriptionLine1)
+* action[+].resource = Reference(PrescriptionLine2)
+* action[+].resource = Reference(PrescriptionLine3)
+* intent = #order
+
+
+
+// Another prescription in a multiline setting with 2 lines.
+// Each line has a unique identifier, and a group identifier that links them together.
+
+Instance: PrescriptionLine4
+InstanceOf: MedicationRequest
+* subject.identifier.value = "patient1"
+* identifier
+  * system = "http://example.com/NamingSystem/prescriptionlines"
+  * value = "line4"
+* groupIdentifier
+  * system = "http://example.com/NamingSystem/prescriptions"
+  * value = "prescr2"
+* status = #active
+* intent = #order
+* medication.concept = #med1
+
+
+
+Instance: PrescriptionLine5
+InstanceOf: MedicationRequest
+* subject.identifier.value = "patient1"
+* identifier
+  * system = "http://example.com/NamingSystem/prescriptionlines"
+  * value = "line5"
+
+* groupIdentifier
+  * system = "http://example.com/NamingSystem/prescriptions"
+  * value = "prescr2"
+* status = #active
+* intent = #order
+* medication.concept = #med1
+
+
+
+
+// In another setting, a single-line prescription is created.
+// RequestOrchestration is not needed in this case.
+// GroupIdentifier is optional - but let's add it to see if it works
+
+Instance: PrescriptionLine6
+InstanceOf: MedicationRequest
+* subject.identifier.value = "patient1"
+* identifier
+  * system = "http://example.com/NamingSystem/prescriptionlines"
+  * value = "line6"
+* groupIdentifier
+  * system = "http://example.com/NamingSystem/prescriptions"
+  * value = "prescr3"
+* status = #active
+* intent = #order
+* medication.concept = #med1
+
+
+
+
+
+
+// In another setting, 3 prescriptions are created, each with 1 line.
+// RequestOrchestration is not needed in this case.
+// GroupIdentifier is not present in this case.
+
+Instance: PrescriptionLine7
+InstanceOf: MedicationRequest
+* subject.identifier.value = "patient1"
+* identifier
+  * system = "http://example.com/NamingSystem/prescriptionlines"
+  * value = "line7"
+* status = #active
+* intent = #order
+* medication.concept = #med1
+
+
+
+Instance: PrescriptionLine8
+InstanceOf: MedicationRequest
+* subject.identifier.value = "patient1"
+* identifier
+  * system = "http://example.com/NamingSystem/prescriptionlines"
+  * value = "line8"
+* status = #active
+* intent = #order
+* medication.concept = #med1
+
+Instance: PrescriptionLine9
+InstanceOf: MedicationRequest
+* subject.identifier.value = "patient1"
+* identifier
+  * system = "http://example.com/NamingSystem/prescriptionlines"
+  * value = "line9"
+* status = #active
+* intent = #order
+* medication.concept = #med1
+