Yes, it looks fine. However use an exact name of external disctionaries and more detailed descriptions. E.g., “MedDRA”, but not “MEDDRA”; and “MedDRA Adverse Events Dictionary”, not “ADVERSE EVENT DICTIONARY”. You need to add the following text into a define.xml file:
<CodeList OID=“AEDICT”
Name=“MedDRA Adverse Events Dictionary”
DataType=“text”>
The only other thing you need to do is to assign your external codelist to a variable in ItemDef element. Something like: