What is the standard intuitive structure of OBIS 6-tuple codes (A.B.C.D.E.F) in Blue Book?

[carlos_mendez]

️ Technical Redaction & Safe Harbor Warning:
Proprietary tariff schemes and meter registers have been replaced with standard IEC 62056-61 OBIS definitions.

When reading the DLMS Blue Book Ed. 17 (IEC 62056-62 Clause 5.1), the 6-tuple OBIS hierarchy A.B.C.D.E.F (e.g. 1.0.1.8.0.255 and 1.0.32.7.0.255) seems overwhelming with hundreds of pages of object dictionaries.
For example, inspecting a raw GET-Request:

C0 01 C1 00 03 01 00 01 08 00 FF 02 00

How do experienced metering engineers memorize and distinguish these 6 numeric groups in practical development?

[alex_turner]

Instead of trying to memorize individual numbers, think of OBIS as a 6-level semantic classification system per Blue Book Section 4.2:

Group	Standard Meaning	Intuitive Rule	Practical Examples
A	Medium / Abstract	What physical commodity?	1 = Electricity, 7 = Gas, 8 = Water, 9 = Heat
B	Channel	Which internal path?	0 = No channel / Total, 1..64 = Sub-meter channels
C	Physical Quantity	What physical parameter?	1 = Active Energy (+A), 31/32/33 = Voltage (L1/L2/L3), 11/12/13 = Current
D	Measurement Type	How is it measured/processed?	8 = Cumulative Energy (integral), 7 = Instantaneous value, 4 = Max demand
E	Tariff / Rate	Which pricing tier?	0 = Total (all tariffs), 1 = T1, 2 = T2, 3 = T3
F	Billing Period	Which historical snapshot?	255 = Current real-time value, 0 = Previous billing period, 1 = 2 periods ago

For example:

• 1.0.1.8.0.255 -> Electricity (1) -> Channel 0 (0) -> Active import (1) -> Cumulative energy (8) -> Total tariff (0) -> Current (255) = Total Active Import Energy (+A).
• 1.0.32.7.0.255 -> Electricity (1) -> Channel 0 (0) -> Phase B Voltage (32) -> Instantaneous (7) -> Real-time (255) = Phase B Instantaneous Voltage.

[sarah_jenkins]

However simple this breakdown looks, it clarifies the entire Blue Book structure.
Now I can easily recognize why 1.0.2.8.0.255 is active export energy (since C=2 represents active export -A, and D=8 represents cumulative integration).
Per IEC 62056-61 Clause 4.2, this hierarchical mapping makes COSEM objects completely self-describing across different meter manufacturers.