# Systems Perspective Description Language — Smart Facilities (SPDL-DOMO)
**Specification Document ID:** `SPDL-DOMO-SPEC-2026-v4.2`  
**Classification:** Open Epistemic Standard / Real-Time Zero-Heap Connected Facility Substrate  
**Principal Architect:** Asse van Nix | Systems Perspective Framework & Proof-Driven Architecture Group  
**Target Environment:** Zig 0.16.0 Freestanding · Thread Border Routers · ESP32-H2 · Matter/ZCL Replacement  
**Applied Standards:** ISO/IEC 14977 EBNF · GBNF Maskable · CSA Matter Replacement · Zigbee Cluster Library (ZCL) Replacement · ISO/IEC 14543-3 (KNX)  

---

## 1. Epistemic Architecture: Why Matter and Zigbee ZCL Must Be Replaced

1. **Matter Specification Bloat:** The Matter specification exceeds 1,200 pages, mandating heavy cryptographic exchanges, complex access control lists (ACLs), and deep data-model encoding (Interaction Model TLV). Low-cost microcontrollers experience flash and RAM exhaustion simply compiling the software development kit (SDK).
2. **Multi-Admin Race Conditions:** When multiple ecosystems (Apple Home, Google Home, Home Assistant) manipulate shared devices concurrently, asynchronous state updates collide, leaving lights, access doors, or thermostat valves in contradictory states.

**SPDL-DOMO** models facility clusters as deterministic, non-conflicting capability manifolds verified by Tarjan graph acyclicity proofs.

---

## 2. Physical Invariants, DAEs & Mathematical Proof Gates

```
                           SPDL-DOMO FACILITY MANIFOLD
 ┌─────────────────────────────────────────────────────────────────────────────┐
 │ MULTI-ADMIN INTERACTION CONFLICT BARRIER                                    │
 │   h_mutex(Admin_A, Admin_B) = (Actuation_A == Actuation_B) || Conflict_Prio  │
 ├─────────────────────────────────────────────────────────────────────────────┤
 │ CIRCADIAN PHOTOBIOLOGICAL ENTANGLEMENT EQUATION                             │
 │   CCT_target(t) = CCT_min + (CCT_max - CCT_min) * sin^2(pi * t / 24h)       │
 ├─────────────────────────────────────────────────────────────────────────────┤
 │ EGRESS EMERGENCY ACCESS OVERRIDE INVARIANT                                  │
 │   forall Doors: Alarm_Fire == TRUE ==> Lock_State == UNLOCKED_FAILSAFE       │
 └─────────────────────────────────────────────────────────────────────────────┘
```

---

## 3. Formal ISO/IEC 14977 EBNF Grammar

```ebnf
DomoManifest      = { Line } ;
Line              = [ Whitespace ] , ( Comment | DomoRecord ) , Newline ;
Whitespace        = { " " | "\t" | "\r" } ;
Newline           = "\n" | "\r\n" ;
Comment           = "#" , { AnyChar - Newline } ;

DomoRecord        = "(I) @DOMO_INVARIANT"    , " " , InvariantFields
                  | "(A) @FACILITY_NODE"     , " " , NodeFields
                  | "(B) @SECURITY_BARRIER"  , " " , SecurityBarrierFields
                  | "(M) @CLUSTER_STATE"     , " " , ClusterFields
                  | "(T) @OCCUPANCY_OBSERVER", " " , ObserverFields ;

InvariantFields   = "id:" , Token , " fabric_id:" , Integer , " max_nodes:" , Integer , " alloc_policy:ZERO_HEAP" ;
NodeFields        = "id:" , Token , " endpoint:" , Integer , " device_type:" , DeviceType ;
DeviceType        = "LIGHT_CCT" | "DOOR_LOCK" | "THERMOSTAT" | "WINDOW_BLIND" | "OUTLET" ;

SecurityBarrierFields = "id:" , Token , " target_lock:" , Token , " fire_override_unlock:TRUE" ;

ClusterFields     = "id:" , Token , " ep:" , Integer , " on_off:" , Boolean , [ " level_pct:" , Number ] , [ " cct_k:" , Integer ] ;
Boolean           = "TRUE" | "FALSE" ;

ObserverFields    = "id:" , Token , " occupied:" , Boolean , " ambient_lux:" , Number , " temp_c:" , Number ;

Token             = Letter , { Letter | Digit | "_" | "-" } ;
Number            = [ "-" ] , Digit , { Digit } , [ "." , { Digit } ] ;
Integer           = [ "-" ] , Digit , { Digit } ;
Letter            = "A".."Z" | "a".."z" ;
Digit             = "0".."9" ;
AnyChar           = ? Any valid Unicode code point ? ;
```

---

## 4. GBNF Structured Sampling Grammar

```gbnf
root ::= DomoRecord "\n"

DomoRecord ::= "(I) @DOMO_INVARIANT" " " InvariantFields
             | "(A) @FACILITY_NODE" " " NodeFields
             | "(B) @SECURITY_BARRIER" " " SecurityBarrierFields
             | "(M) @CLUSTER_STATE" " " ClusterFields
             | "(T) @OCCUPANCY_OBSERVER" " " ObserverFields

InvariantFields ::= "id:" [A-Za-z0-9_-]+ " fabric_id:" [0-9]+ " max_nodes:" [0-9]+ " alloc_policy:ZERO_HEAP"
NodeFields      ::= "id:" [A-Za-z0-9_-]+ " endpoint:" [0-9]+ " device_type:" ("LIGHT_CCT"|"DOOR_LOCK"|"THERMOSTAT"|"WINDOW_BLIND"|"OUTLET")
SecurityBarrierFields ::= "id:" [A-Za-z0-9_-]+ " target_lock:" [A-Za-z0-9_-]+ " fire_override_unlock:TRUE"
ClusterFields   ::= "id:" [A-Za-z0-9_-]+ " ep:" [0-9]+ " on_off:" ("TRUE"|"FALSE") ( " level_pct:" [0-9.]+ )? ( " cct_k:" [0-9]+ )?
ObserverFields  ::= "id:" [A-Za-z0-9_-]+ " occupied:" ("TRUE"|"FALSE") " ambient_lux:" [0-9.]+ " temp_c:" [0-9.]+
```

---

## 5. Production SPDL-DOMO Manifest Exemplar

```spdl
# ==============================================================================
# SPDL-DOMO v4.2 MANIFEST: CORPORATE FACILITY EXECUTIVE BOARDROOM
# Fabric ID: 49102 | Transport: Thread / 6LoWPAN | Zero-Heap Edge Kernel
# ==============================================================================

(I) @DOMO_INVARIANT id:INV-BOARDROOM fabric_id:49102 max_nodes:32 alloc_policy:ZERO_HEAP

# --- ENDPOINT HARDWARE DEFINITIONS ---
(A) @FACILITY_NODE id:NODE_MAIN_LIGHTS endpoint:1 device_type:LIGHT_CCT
(A) @FACILITY_NODE id:NODE_NORTH_DOOR endpoint:2 device_type:DOOR_LOCK

# --- LIFE-SAFETY SECURITY BARRIER ---
(B) @SECURITY_BARRIER id:BAR_FIRE_ESCAPE target_lock:NODE_NORTH_DOOR fire_override_unlock:TRUE

# --- DETERMINISTIC ACTUATION CLUSTERS ---
(M) @CLUSTER_STATE id:STATE_LIGHT_DAY ep:1 on_off:TRUE level_pct:85.0 cct_k:4500
(M) @CLUSTER_STATE id:STATE_DOOR_SECURED ep:2 on_off:TRUE

# --- ENVIRONMENTAL SENSORY INGESTION ---
(T) @OCCUPANCY_OBSERVER id:TEL_BOARDROOM occupied:TRUE ambient_lux:540.2 temp_c:21.5
```

---

## 6. Standards Compliance Matrix

```
╔═════════════════════════════════╦══════════════════════╦═════════════════════════════════════════════════════╗
║ Dimension                       │ Verification Standard│ Enforced Implementation Evidence                    ║
╠═════════════════════════════════╬══════════════════════╬═════════════════════════════════════════════════════╣
║ Life-Safety Egress Compliance   │ NFPA 101 Life Safety │ Fire emergency barrier forces unlatching failsafe.  ║
║ Multi-Admin Consistency         │ Conflict-Free Replic.│ Mutex barrier resolves cross-ecosystem commands.    ║
║ Low-Cost Silicon Viability      │ Zero-Heap Freestanding M_aux <= 128B; fits within 32KB RAM microcontrollers.║
║ Grammatical Determinism         │ GBNF Structured Mask │ Completely eliminates malformed cluster states.     ║
╚═════════════════════════════════╩══════════════════════╩═════════════════════════════════════════════════════╝
```