| Level/ Type | 
                              Code | 
                              Display Name | 
                              Code System | 
                           
                           
                              | 0‑L | 
                              
                                  AC 
                               | 
                              
                                  before meal (from lat. ante cibus) 
                               | 
                              TimingEvent | 
                           
                           
                              | 0‑L | 
                              
                                  ACD 
                               | 
                              
                                  before lunch (from lat. ante cibus diurnus) 
                               | 
                              TimingEvent | 
                           
                           
                              | 0‑L | 
                              
                                  ACM 
                               | 
                              
                                  before breakfast (from lat. ante cibus matutinus) 
                               | 
                              TimingEvent | 
                           
                           
                              | 0‑L | 
                              
                                  ACV 
                               | 
                              
                                  before dinner (from lat. ante cibus vespertinus) 
                               | 
                              TimingEvent | 
                           
                           
                              | 0‑L | 
                              
                                  HS 
                               | 
                              
                                  Prior to beginning a regular period of extended sleep (this would exclude naps). Note
                                    that this might occur at different times of day depending on a person's regular sleep
                                    schedule.
                                  
                               | 
                              TimingEvent | 
                           
                           
                              | 0‑L | 
                              
                                  IC 
                               | 
                              
                                  between meals (from lat. inter cibus) 
                               | 
                              TimingEvent | 
                           
                           
                              | 0‑L | 
                              
                                  ICD 
                               | 
                              
                                  between lunch and dinner 
                               | 
                              TimingEvent | 
                           
                           
                              | 0‑L | 
                              
                                  ICM 
                               | 
                              
                                  between breakfast and lunch 
                               | 
                              TimingEvent | 
                           
                           
                              | 0‑L | 
                              
                                  ICV 
                               | 
                              
                                  between dinner and the hour of sleep 
                               | 
                              TimingEvent | 
                           
                           
                              | 0‑L | 
                              
                                  PC 
                               | 
                              
                                  after meal (from lat. post cibus) 
                               | 
                              TimingEvent | 
                           
                           
                              | 0‑L | 
                              
                                  PCD 
                               | 
                              
                                  after lunch (from lat. post cibus diurnus) 
                               | 
                              TimingEvent | 
                           
                           
                              | 0‑L | 
                              
                                  PCM 
                               | 
                              
                                  after breakfast (from lat. post cibus matutinus) 
                               | 
                              TimingEvent | 
                           
                           
                              | 0‑L | 
                              
                                  PCV 
                               | 
                              
                                  after dinner (from lat. post cibus vespertinus) 
                               | 
                              TimingEvent | 
                           
                           
                              
                                  
                               |