Update documentation to reflect SB15-SB99 subject category restriction

Co-authored-by: AmedeoPelliccia <164860269+AmedeoPelliccia@users.noreply.github.com>

Author: Copilot

00_00_CAT_LC01_SPACET_nomenclature-quick-reference_v02.md

@@ -1,9 +1,9 @@
 # Nomenclature Standard Quick Reference
 
-## Pattern
+## Pattern (v2.0 - 8 Fields)
 
 ```
-[ROOT]_[BUCKET]_[TYPE]_[VARIANT]_[DESCRIPTION]_[VERSION].[EXT]
+[ROOT]_[BUCKET]_[TYPE]_[LC_OR_SUBBUCKET]_[VARIANT]_[DESCRIPTION]_[VERSION].[EXT]
 ```
 
 ## Field Rules
@@ -13,19 +13,26 @@
 | ROOT | 2-3 digits | `00`, `24`, `72`, `115`, `116` |
 | BUCKET | 2 digits | `00`, `10`, `20`, `30`, `40`, `50`, `60`, `70`, `80`, `90` |
 | TYPE | 2-8 uppercase | `PLAN`, `FHA`, `REQ`, `STD`, `IDX` |
-| VARIANT | Uppercase + hyphens | `SPACET`, `DRAFT`, `SYS`, `LC02-SPACET` |
+| LC_OR_SUBBUCKET | LC01-LC14 or SB15-SB99 | `LC01`, `LC14`, `SB15`, `SB99` |
+| VARIANT | Uppercase + hyphens | `SPACET`, `DRAFT`, `SYS`, `HW-01` |
 | DESCRIPTION | lowercase-kebab-case | `safety-program`, `propulsion`, `hazard-log` |
 | VERSION | v + 2 digits | `v01`, `v02`, `v10` |
 | EXT | lowercase | `md`, `json`, `xlsx`, `pdf` |
 
 ## Special Rules
 
-### ⚠️ CRITICAL: BUCKET=00 requires LC prefix
+### ⚠️ CRITICAL: Subject Category Rules
 
-If `BUCKET=00`, then `VARIANT` **MUST** start with `LC01` through `LC14`
+**If `BUCKET=00`** → Use **LC** (Lifecycle) category:
+- `LC_OR_SUBBUCKET` **MUST** be `LC01` through `LC14`
+- Example: ✅ `00_00_PLAN_LC02_SPACET_safety-program_v01.md`
+- Invalid: ❌ `00_00_PLAN_SB15_SPACET_safety-program_v01.md`
 
-✅ `00_00_PLAN_LC02-SPACET_safety-program_v01.md`  
-❌ `00_00_PLAN_SPACET_safety-program_v01.md`
+**If `BUCKET≠00`** → Use **SB** (Sub-bucket) category:
+- `LC_OR_SUBBUCKET` **MUST** be `SB15` through `SB99`
+- Example: ✅ `00_70_FHA_SB15_SYS_propulsion_v01.md`
+- Invalid: ❌ `00_70_FHA_SB00_SYS_propulsion_v01.md`
+- Invalid: ❌ `00_70_FHA_LC01_SYS_propulsion_v01.md`
 
 ### Delimiters
 
@@ -34,18 +41,18 @@ If `BUCKET=00`, then `VARIANT` **MUST** start with `LC01` through `LC14`
 
 ## BUCKET Values
 
-| Code | Domain |
-|------|--------|
-| `00` | Lifecycle (requires LC prefix in VARIANT) |
-| `10` | Operations |
-| `20` | Primary Subsystem |
-| `30` | Circularity |
-| `40` | Software |
-| `50` | Structures |
-| `60` | Storages |
-| `70` | Propulsion |
-| `80` | Energy |
-| `90` | Tables/Schemas/Diagrams/Reference |
+| Code | Domain | Subject Category |
+|------|--------|------------------|
+| `00` | Lifecycle | Uses LC01-LC14 |
+| `10` | Operations | Uses SB15-SB99 |
+| `20` | Primary Subsystem | Uses SB15-SB99 |
+| `30` | Circularity | Uses SB15-SB99 |
+| `40` | Software | Uses SB15-SB99 |
+| `50` | Structures | Uses SB15-SB99 |
+| `60` | Storages | Uses SB15-SB99 |
+| `70` | Propulsion | Uses SB15-SB99 |
+| `80` | Energy | Uses SB15-SB99 |
+| `90` | Tables/Schemas/Diagrams/Reference | Uses SB15-SB99 |
 
 ## Approved TYPE Codes
 
@@ -76,28 +83,31 @@ python validate_nomenclature.py --check-all
 ### ✅ Valid
 
 ```
-00_00_PLAN_LC02-SPACET_safety-program_v01.md
-00_70_FHA_SYS_propulsion_v01.md
-00_40_REQ_SW_software-safety-reqs_v01.md
-00_20_TRC_SPACET_traceability-matrix_v01.xlsx
-00_90_SCH_GEN_hazard-log-schema_v01.json
-24_40_REQ_SW-01_electrical-power-software_v01.md
+00_00_PLAN_LC02_SPACET_safety-program_v01.md
+00_70_FHA_SB15_SYS_propulsion_v01.md
+00_40_REQ_SB15_SW_software-safety-reqs_v01.md
+00_20_TRC_SB15_SPACET_traceability-matrix_v01.xlsx
+00_90_SCH_SB15_GEN_hazard-log-schema_v01.json
+24_40_REQ_SB20_SW_electrical-power-software_v01.md
 ```
 
 ### ❌ Invalid
 
 ```
-00_00_PLAN_SPACET_safety-program_v01.md       # Missing LC prefix
-00-70-FHA-SYS-propulsion-v01.md              # Wrong delimiter
-00_70_FHA_SYS_propulsion_v1.md               # VERSION must be vNN
-00_99_LST_GEN_glossary_v01.md                # Invalid BUCKET
-00_70_FHA_SYS_PropulsionFHA_v01.md           # Uppercase in DESCRIPTION
-00_70_fha_SYS_propulsion_v01.md              # Lowercase TYPE
+00_00_PLAN_SB15_SPACET_safety-program_v01.md  # BUCKET=00 requires LC, not SB
+00_70_FHA_SB00_SYS_propulsion_v01.md          # SB00 not allowed (must be SB15+)
+00_70_FHA_LC01_SYS_propulsion_v01.md          # BUCKET≠00 requires SB, not LC
+00-70-FHA-SB15-SYS-propulsion-v01.md          # Wrong delimiter
+00_70_FHA_SB15_SYS_propulsion_v1.md           # VERSION must be vNN
+00_99_LST_SB15_GEN_glossary_v01.md            # Invalid BUCKET
+00_70_FHA_SB15_SYS_PropulsionFHA_v01.md       # Uppercase in DESCRIPTION
+00_70_fha_SB15_SYS_propulsion_v01.md          # Lowercase TYPE
 ```
 
 ## Common Mistakes
 
-1. **Missing LC prefix for BUCKET=00**
+1. **Wrong subject category for BUCKET=00**: Must use LC01-LC14, not SB
+2. **Using SB00-SB14**: Only SB15-SB99 are valid
    - Fix: Add `LC01` through `LC14` to start of VARIANT
    - Example: `SPACET` → `LC02-SPACET`
 

00_00_STD_LC01_SPACET_nomenclature-standard_v02.md

@@ -36,7 +36,7 @@ All files must strictly adhere to the **8-field format**:
 | **ROOT**             | ATA Chapter or Project Code           | 2-3 digits                             | `^\d{2,3}$`                  |
 | **BUCKET**           | Domain Classification (OPT-IN + LC)   | 2 digits (enum)                        | `^(00\|10\|20\|30\|40\|50\|60\|70\|80\|90)$` |
 | **TYPE**             | Artifact Type                         | 2–8 uppercase alphanumeric             | `^[A-Z0-9]{2,8}$`            |
-| **LC_OR_SUBBUCKET**  | Lifecycle Stage or Sub-bucket         | LC01-LC14 or SB00-SB99                 | `^(LC(0[1-9]\|1[0-4])\|SB\d{2})$` |
+| **LC_OR_SUBBUCKET**  | Lifecycle Stage or Sub-bucket         | LC01-LC14 or SB15-SB99                 | `^(LC(0[1-9]\|1[0-4])\|SB(1[5-9]\|[2-9]\d))$` |
 | **VARIANT**          | Configuration / Baseline / Item Class | uppercase alphanumeric; hyphen allowed | `^[A-Z0-9]+(?:-[A-Z0-9]+)*$` |
 | **DESCRIPTION**      | Human-readable content label          | lowercase kebab-case                   | `^[a-z0-9]+(?:-[a-z0-9]+)*$` |
 | **VERSION**          | Revision Control                      | `v` + 2 digits                         | `^v\d{2}$`                   |
@@ -94,7 +94,7 @@ The following set is **approved** for v1.0. Extensions require Configuration Man
 
 This mandatory field encodes either:
 - **Lifecycle stage** (LC01-LC14) for `BUCKET=00` files
-- **Sub-bucket** identifier (SB00-SB99) for all other buckets
+- **Sub-bucket** identifier (SB15-SB99) for all other buckets
 
 **Conditional rules (mandatory):**
 
@@ -103,21 +103,21 @@ This mandatory field encodes either:
    ^LC(0[1-9]|1[0-4])$
    ```
    * Valid: `LC01`, `LC02`, ..., `LC14`
-   * Invalid: `SB00`, `LC00`, `LC15`
+   * Invalid: `SB15`, `LC00`, `LC15`
 
 2. **If `BUCKET ≠ 00`** → `LC_OR_SUBBUCKET` **must** match:
    ```regex
-   ^SB\d{2}$
+   ^SB(1[5-9]|[2-9]\d)$
    ```
-   * Valid: `SB00`, `SB01`, ..., `SB99`
-   * Invalid: `LC01`, `SB`, `SBXX`
-   * **Convention**: Use `SB00` if no sub-bucket applies
+   * Valid: `SB15`, `SB16`, ..., `SB99`
+   * Invalid: `LC01`, `SB00`, `SB01`, ..., `SB14`, `SB`, `SBXX`
+   * **Convention**: SB00-SB14 are reserved and not allowed
 
 **Sub-bucket mapping:**
-* `SB00` = No sub-bucket / Not applicable
-* `SB01` = Maps to directory sub-bucket `*-01_*` (e.g., `00-20-01_*`)
-* `SB02` = Maps to directory sub-bucket `*-02_*`
+* `SB15` = First available sub-bucket
+* `SB16` = Maps to directory sub-bucket (implementation-specific)
 * etc.
+* Note: SB00-SB14 are reserved and not available for use
 
 ### 4.5 `[VARIANT]` (Configuration / Baseline)
 
@@ -138,7 +138,7 @@ Hyphenated variants are allowed: `SYS-01`, `SW-PLAT-A`.
 
 * Must be lowercase kebab-case.
 * Must not duplicate semantic content already encoded in `TYPE` or `BUCKET`.
-  * Example: avoid `..._FHA_SYS_propulsion-fha_...` → use `..._FHA_SB00_SYS_propulsion_...`
+  * Example: avoid `..._FHA_SYS_propulsion-fha_...` → use `..._FHA_SB15_SYS_propulsion_...`
 
 ### 4.7 `[VERSION]`
 
@@ -154,7 +154,7 @@ Hyphenated variants are allowed: `SYS-01`, `SW-PLAT-A`.
 This regex validates the general filename structure for v2.0:
 
 ```regex
-^(?<root>\d{2})_(?<bucket>00|10|20|30|40|50|60|70|80|90)_(?<type>[A-Z0-9]{2,8})_(?<stage>(LC(0[1-9]|1[0-4])|SB\d{2}))_(?<variant>[A-Z0-9]+(?:-[A-Z0-9]+)*)_(?<desc>[a-z0-9]+(?:-[a-z0-9]+)*)_(?<ver>v\d{2})\.(?<ext>[a-z0-9]{1,6})$
+^(?<root>\d{2})_(?<bucket>00|10|20|30|40|50|60|70|80|90)_(?<type>[A-Z0-9]{2,8})_(?<stage>(LC(0[1-9]|1[0-4])|SB(1[5-9]|[2-9]\d)))_(?<variant>[A-Z0-9]+(?:-[A-Z0-9]+)*)_(?<desc>[a-z0-9]+(?:-[a-z0-9]+)*)_(?<ver>v\d{2})\.(?<ext>[a-z0-9]{1,6})$
 ```
 
 ### 5.2 Conditional Rules (Mandatory)
@@ -168,7 +168,7 @@ CI shall additionally enforce:
 
 * **If `bucket != "00"`** then `stage` matches:
   ```regex
-  ^SB\d{2}$
+  ^SB(1[5-9]|[2-9]\d)$
   ```
 
 ---
@@ -179,17 +179,17 @@ CI shall additionally enforce:
 
 * Lifecycle (LC) plan:
   * `00_00_PLAN_LC02_SPACET_safety-program_v02.md`
-* Propulsion FHA (domain bucket with no sub-bucket):
-  * `00_70_FHA_SB00_SYS_propulsion_v02.md`
+* Propulsion FHA (domain bucket with sub-bucket):
+  * `00_70_FHA_SB15_SYS_propulsion_v02.md`
 * Software safety requirements:
-  * `00_40_REQ_SB00_SW_software-safety-reqs_v02.md`
+  * `00_40_REQ_SB15_SW_software-safety-reqs_v02.md`
 * Traceability matrix workbook:
-  * `00_20_TRC_SPACET_traceability-matrix_v01.xlsx`
+  * `00_20_TRC_SB15_SPACET_traceability-matrix_v01.xlsx`
 * Reference schema:
-  * `00_90_SCH_GEN_hazard-log-schema_v01.json`
+  * `00_90_SCH_SB15_GEN_hazard-log-schema_v01.json`
 * Extended ATA code (3-digit ROOT):
   * `115_00_PLAN_LC01_SPACET_supply-chain-plan_v01.md`
-  * `116_70_FHA_SB00_SYS_facility-systems_v01.md`
+  * `116_70_FHA_SB15_SYS_facility-systems_v01.md`
 
 ### 6.2 Invalid examples