## **1. Overview: The V-Model** The **V-model** breaks systems engineering into two symmetric legs: ### Left Side: Decomposition (Top-down) - **System Requirements** - **High-level Design** - **Detailed Design** ### Right Side: Integration & Verification (Bottom-up) - **Unit Testing** - **Subsystem Integration** - **System Validation** The bottom of the V is **Implementation**. --- ## **2. Where UHX Fits** |V-Model Phase|UHT Entity Role|UHR Relationship Role| |---|---|---| |**System Requirements**|Symbolic + Behavior-guiding + Regulated|UHR: Symbolic + Governed (`0x18`) – _represents required behavior_| |**System Architecture**|Structural + Hierarchical + Functional|UHR: Hierarchical + Causal (`0x60`) – _decomposes or derives from_| |**Detailed Design**|Man-made + Purposeful + Signal/Logic|UHR: Composed (`0x24`) – _implements or satisfies_| |**Implementation**|Material + Perceptible + Output-emitting|UHT only — embodiment of abstract spec| |**Unit Testing**|Symbolic + Temporal + Governed|UHR: Symbolic + Temporal (`0x14`) – _verifies or evaluates_| |**Integration Testing**|Context-sensitive + Hierarchical + Temporal|UHR: Contextual + Hierarchical (`0x22`) – _reconnects components_| |**Validation**|Communicative + Social + Regulated|UHR: Causal + Governed + Symbolic (`0x58`) – _fulfills user requirement_| --- ## **3. UHX Mapping to the V** ### A. **Top-Down Leg (Left Side)** |Phase|UHT Traits (Entity)|UHR Relationships| |---|---|---| |**System Requirement**|Symbolic (17), Behavior-guiding (21), Regulated (28)|UHR `0x18`: Symbolic + Governed| |**Architecture**|Structural (5), Hierarchical (20), Purposeful (9)|UHR `0x60`: Hierarchical + Causal| |**Detailed Design**|Man-made (2), Emits (10), Signal logic (11)|UHR `0x24`: Signal path, realization| Each entity in these phases can be assigned a **UHT fingerprint**, and each refinement relationship encoded via **UHR hex**. --- ### B. **Bottom-Up Leg (Right Side)** |Phase|UHT Traits (Entity)|UHR Relationships| |---|---|---| |**Unit Test**|Symbolic (17), Temporal (23), Regulated (28)|UHR `0x14`: Symbolic + Temporal| |**Integration Test**|Structural (5), Context-sensitive (31), Temporal (23)|UHR `0x22`: Hierarchical + Contextual| |**Validation**|Communicative (18), Regulated (28), Identity-linked (27)|UHR `0x58`: Symbolic + Governed + Causal| These relationships can also be **inverted** or tracked bi-directionally, e.g., a test case **verifies** a component → that component is **verified by** (reciprocal, but non-symmetric link). --- ## **4. Semantic Traceability** By using **UHT codes on artifacts** and **UHR codes on links**, you can: - Trace requirements all the way to implementations and tests - Filter for **critical**, **context-sensitive**, or **symbolically mismatched** chains - Detect semantic inconsistencies: - e.g. if a highly symbolic requirement is “satisfied” by a component with no symbolic traits, something may be off --- ## **5. Visualizing the UHX-V Model** You could visualize the V-model with: - **Nodes:** Tagged with UHT hex codes (entity semantics) - **Edges:** Labeled with UHR hex codes (link semantics) - **Color or glyphs** to show layer densities (Physical / Functional / Abstract / Social) This becomes a **semantic blueprint of the system lifecycle** — auditable, explainable, and AI-parsable. --- ## **6. Bonus: Semantic Deltas Across the V** With UHX: - You can compute **trait deltas** from requirement → design → test - You can visualize mismatches in form (Physical) vs meaning (Abstract) vs regulation (Social) - You can ask: **What is the conceptual distance between a spec and what was built?** --- ## ✅ TL;DR > UHX maps naturally onto the V-model as a **semantic metadata layer**: - UHT codes define **what each artifact is** - UHR codes define **how they relate** - The V-model becomes **semantically traceable, compressible, and explainable**