diff --git a/namco/identifiers.md b/namco/identifiers.md
index 838d735..801a281 100644
--- a/namco/identifiers.md
+++ b/namco/identifiers.md
@@ -4,9 +4,15 @@ This file describes the various identifiers and their formats that are used in p
 
 ## Generic fields
 
+### Game code
+
+A sequence of three letters or numbers that identifies a specific NAMCO title. Example: `TE7` is Tekken 7.
+
 ### Region code
 
-* `1`: JPN
+A single digit indicating the region for a specific release.
+
+* `1`: JPN / (unreadable kanji)
 * `2`: ASIA / 一般海外 ASIA
 * `3`: EXP / EXP、NAI
 * `4`: CHINA (https://www.ebay.co.uk/itm/165005792426?mkevt=1&mkcid=1&mkrid=710-53481-19255-0&campid=5338722076&toolid=10001)
@@ -15,8 +21,12 @@ This file describes the various identifiers and their formats that are used in p
 
 ### Cabinet role
 
+A sequence of two letters indicating the cabinet role for a specific release.
+
+* `CT`: counter?
 * `LM`: live monitor?
 * `NA`: normal?
+* `RS`: ?
 * `ST`: station?
 * `TM`: terminal?
 * `TW`: medal/card game?
@@ -26,9 +36,10 @@ This file describes the various identifiers and their formats that are used in p
 ## Product code
 
 Components:
-- `$g`: game code, `[A-Z0-9]{3}`
+- `$g`: [game code](#game-code), `[A-Z0-9]{3}`
 - `$v`: version, `[0-9]`
 - `$r`: revision, `[A-B]`
+- `$R`: revision, `[A-B][0-9]{2}`
 - `$l`: [region code (locale)](#region-code), `[0-9]`
 - `$a`: unknown, `[0-9]`
 - `$b`: unknown, `[0-9]`
@@ -61,21 +72,26 @@ Formats:
     - `PBN100-1-NA-MPRO-A`: game code PBN, version 1, $a 0, $b 0, locale Japan, cabinet role normal, type M production, revision A
     - `GCB100-1-TW-MPRO-B`: game code GCB, version 1, $a 0, $b 0, locale Japan, cabinet role TW, type M production, revision B
     - `GKE300-1-TM-DAT0-A`: game code GKE, version 3, $a 0, $b 0, locale Japan, cabinet role terminal, type data, revision A
+- `$g$v$a$b-$l-$c-$t-$R`
+  * Used in late ES3, ES4, BNA1
+  * Examples:
+    - `MHM200-1-NA-MPR0-C01`: game code MHM, version 2, $a 0, $b 0, locale Japan, cabinet role normal, type M production, revision C01
+    - `T46430-1-CT-MPR0-F03`: game code T46, version 4, $a 3, $b 0, locale Japan, cabinet role CT, type M production, revision F03
 
 ## Dongle serial
 
 Components:
 - `$g`: game code, `[0-9]{4}`
 - `$r`: [region code](#region-code), `[0-9]`
-- `$d`: dongle type, `[0-9]`
+- `$c`: cabinet role, `[0-9]`
 - `$t`: title code, `[0-9]{2}`
 - `$n`: serial number, `[0-9]{4}`
 
 Formats:
-- `a$d$r$a $t$na`
+- `a$d$c$a $t$na`
   * Examples:
-    - `a274811 260532a`: game #2748, region Japan, type 1, title 26, serial number 0532
-    - `a2793 13393143a`: game #2793, region Japan, type 3, title 39, serial number 3143
+    - `a274811 260532a`: game #2748, region Japan, cabinet role 1, title 26, serial number 0532
+    - `a2793 13393143a`: game #2793, region Japan, cabinet role 3, title 39, serial number 3143
 
 Unknowns:
 - System 256 dongle (memory card): `a 026161 351019 a`
@@ -88,12 +104,12 @@ Components:
   * `D`:
   * `E`:
   * `G`:
-- `$a`: account code, `[0-9]`
+- `$c`: cabinet role, `[0-9]`
 - `$t`: title code, `[0-9]{2}`
 - `$n`: serial number, `[0-9]{4}`
 
 Formats:
 - `AB$xN-$a$t$n`
   * Examples:
-    - `ABGN-1260532`: unknown G, account 1, title 26, serial number 0532
-    - `ABEN-3393143`: unknown E, account 3, title 39, serial number 3143
+    - `ABGN-1260532`: unknown G, cabinet role 1, title 26, serial number 0532
+    - `ABEN-3393143`: unknown E, cabinet role 3, title 39, serial number 3143