--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Resources/Samples/Lua/ModifyInstanceWithSequence.lua	Fri Oct 09 13:31:22 2015 +0200
@@ -0,0 +1,28 @@
+-- Answer to:
+-- https://groups.google.com/d/msg/orthanc-users/0ymHe1cDBCQ/YfD0NoOTn0wJ
+-- Applicable starting with Orthanc 0.9.5
+
+function OnStoredInstance(instanceId, tags, metadata, origin)
+   -- Do not modify twice the same file
+   if origin['RequestOrigin'] ~= 'Lua' then
+      local replace = {}
+      replace['0010,1002'] = {}
+      replace['0010,1002'][1] = {}
+      replace['0010,1002'][1]['PatientID'] = 'Hello'
+      replace['0010,1002'][2] = {}
+      replace['0010,1002'][2]['PatientID'] = 'World'
+
+      local request = {}
+      request['Replace'] = replace
+
+      -- Create the modified instance
+      local modified = RestApiPost('/instances/' .. instanceId .. '/modify',
+                                   DumpJson(request))
+
+      -- Upload the modified instance to the Orthanc store
+      RestApiPost('/instances/', modified)
+
+      -- Delete the original instance
+      RestApiDelete('/instances/' .. instanceId)
+   end
+end