Index: leahi_dialin/common/td_defs.py
===================================================================
diff -u -r43f69b19f03145572d88f5f3c0cc739503c6d647 -rbe799e12803dba3054ff893b68f8b79a9dde440b
--- leahi_dialin/common/td_defs.py	(.../td_defs.py)	(revision 43f69b19f03145572d88f5f3c0cc739503c6d647)
+++ leahi_dialin/common/td_defs.py	(.../td_defs.py)	(revision be799e12803dba3054ff893b68f8b79a9dde440b)
@@ -14,9 +14,13 @@
 #
 ############################################################################
 
+# Module import
 from enum import unique
 
-from ..utils.enums import DialinEnum
+# Project import
+from leahi_dialin.common.dd_defs import DDInstitutionalRecordBasicFields
+from leahi_dialin.common.generic_defs import DataTypes, RecordsBaseEnum
+from leahi_dialin.utils.enums import DialinEnum
 
 
 # ================================================== Enum Creators: Operations Lvl 1 ==================================================
@@ -1330,3 +1334,121 @@
     'HEPATITIS_B_NEGATIVE': ['negative'],
     'NUM_OF_HEPATITIS_B_STATUS': [],
 }
+
+
+# ================================================== Enum Creators: Record Sub Fields ==================================================
+
+
+
+# ================================================== Enum Creators: Record Fields ==================================================
+@unique
+class TDSystemRecordFields(RecordsBaseEnum):
+    TOP_LEVEL_PN                = (0, DataTypes.U08, 10)        # Top level part number
+    TOP_LEVEL_SN                = (1, DataTypes.U08, 20)        # Top level serial number
+    MFG_LOCATION                = (2, DataTypes.U08)            # Manufacturing Location
+    MFG_DATE                    = (3, DataTypes.U32)            # Manufacturing Date
+    NUM_OF_SYSTEM_RECORD_FIELDS = (4, DataTypes.NONE)           # Number of System Record Fields
+
+TDSystemRecordFields._str_list = {
+    # Official Name :               Accepted strings
+    'TOP_LEVEL_PN': ['pn', 'part number'],
+    'TOP_LEVEL_SN': ['sn', 'serial number'],
+    'MFG_LOCATION': ['location', 'manufacturing location'],
+    'MFG_DATE': ['date', 'manufacturing date'],
+    'NUM_OF_SYSTEM_RECORD_FIELDS': [],
+}
+
+
+@unique
+class TDServiceRecordFields(RecordsBaseEnum):
+    SERVICE_LOC                     = (0, DataTypes.U08)        # DD service location
+    LAST_SERVICE_EPOCH_DATE         = (1, DataTypes.U32)        # DD last service date in epoch
+    SERVICE_INTERVAL_SECONDS        = (2, DataTypes.U32)        # DD service interval in seconds
+    LAST_RESET_TIME_EPOCH           = (3, DataTypes.U32)        # Last time the record was reset in epoch
+    NUM_OF_SERVICE_RECORD_FIELDS    = (4, DataTypes.NONE)       # Number of Service Record Fields
+
+TDServiceRecordFields._str_list = {
+    # Official Name :               Accepted strings
+    'SERVICE_LOC': [],
+    'LAST_SERVICE_EPOCH_DATE': [],
+    'SERVICE_INTERVAL_SECONDS': [],
+    'LAST_RESET_TIME_EPOCH': [],
+    'NUM_OF_SERVICE_RECORD_FIELDS': [],
+}
+
+
+def get_calibration_record_fields() -> RecordsBaseEnum:
+    # Creating the enum members list
+    i = 0
+    members = {}
+    members[f'NUM_OF_CALIBRATION_RECORD_FIELDS'] = (i, DataTypes.NONE)
+    
+    # Enum creation
+    TDCalibrationRecordFields = RecordsBaseEnum('TDCalibrationRecordFields', members,)
+
+    # Setting the _str_list values for the enum
+    TDCalibrationRecordFields._str_list = {}
+    for member in members:
+        TDCalibrationRecordFields._str_list[member] = []
+    
+    return TDCalibrationRecordFields
+
+
+@unique
+class TDInstitutionalRecordBasicFields(RecordsBaseEnum):
+    CALIBRATION_TIME                            = (0, DataTypes.U32)        # Calibration time in epoch.
+    NUM_OF_INSTITUTIONAL_RECORD_BASIC_FIELDS    = (1, DataTypes.NONE)       # Number of Institutional Record Basic Fields
+
+TDInstitutionalRecordBasicFields._str_list = {
+    # Official Name :               Accepted strings
+    'CALIBRATION_TIME': [],
+    'NUM_OF_INSTITUTIONAL_RECORD_BASIC_FIELDS': [],
+}
+
+
+@unique
+class TDInstitutionalRecordAdvancedFields(RecordsBaseEnum):
+    CALIBRATION_TIME                            = (0, DataTypes.U32)        # Calibration time in epoch.
+    NUM_OF_INSTITUTIONAL_RECORD_ADVANCED_FIELDS = (1, DataTypes.NONE)       # Number of Institutional Record Advanced Fields
+
+TDInstitutionalRecordAdvancedFields._str_list = {
+    # Official Name :               Accepted strings
+    'CALIBRATION_TIME': [],
+    'NUM_OF_INSTITUTIONAL_RECORD_ADVANCED_FIELDS': [],
+}
+
+
+@unique
+class TDInstitutionalRecordAdditionalFields(RecordsBaseEnum):
+    CALIBRATION_TIME                                = (0, DataTypes.U32)    # Calibration time in epoch.
+    NUM_OF_INSTITUTIONAL_RECORD_ADDITIONAL_FIELDS   = (1, DataTypes.NONE)   # Number of Institutional Record Additional Fields
+
+TDInstitutionalRecordAdditionalFields._str_list = {
+    # Official Name :               Accepted strings
+    'CALIBRATION_TIME': [],
+    'NUM_OF_INSTITUTIONAL_RECORD_ADDITIONAL_FIELDS': [],
+}
+
+
+@unique
+class TDUsageInformationRecordFields(RecordsBaseEnum):
+    RO_WATER_GEN_TOTAL_L                        = (0, DataTypes.F32)        # Total RO water generated in liters. (Cannot be reset)
+    RO_WATER_GEN_SINCE_LAST_SERVICE_L           = (1, DataTypes.F32)        # RO water generated since last treatment in liters
+    LAST_BASIC_FLUSH_COMPLETE_DATE_EPOCH        = (2, DataTypes.U32)        # Last basic flush complete date in epoch.
+    LAST_HEAT_DISINFECT_COMPLETE_DATE_EPOCH     = (3, DataTypes.U32)        # Last heat disinfect complete date in epoch.
+    LAST_HEAT_ACTIVE_COOL_COMPLETE_DATE_EPOCH   = (4, DataTypes.U32)        # Last heat disinfect active cool complete date in epoch.
+    LAST_FILTER_FLUSH_COMPLETE_DATE_EPOCH       = (5, DataTypes.U32)        # Last filter flush complete date in epoch.
+    LAST_RESET_TIME_EPOCH                       = (6, DataTypes.U32)        # Last time the record was reset in epoch.
+    NUM_OF_USAGE_INFO_RECORD_FIELDS             = (7, DataTypes.NONE)       # Number of Usage Information Record Fields
+
+TDUsageInformationRecordFields._str_list = {
+    # Official Name :               Accepted strings
+    'RO_WATER_GEN_TOTAL_L': [],
+    'RO_WATER_GEN_SINCE_LAST_SERVICE_L': [],
+    'LAST_BASIC_FLUSH_COMPLETE_DATE_EPOCH': [],
+    'LAST_HEAT_DISINFECT_COMPLETE_DATE_EPOCH': [],
+    'LAST_HEAT_ACTIVE_COOL_COMPLETE_DATE_EPOCH': [],
+    'LAST_FILTER_FLUSH_COMPLETE_DATE_EPOCH': [],
+    'LAST_RESET_TIME_EPOCH': [],
+    'NUM_OF_USAGE_INFO_RECORD_FIELDS': [],
+}