# 🧱 UHT Entity Mapping Cheat Sheet (SysML Types → UHT Fingerprints)
This reference maps common **SysML object types** to their accurate **UHT semantic encodings**, expressed as 32-bit hexadecimal fingerprints. Each entry includes trait breakdowns and class labels — perfect for tagging models and semantic querying inside Obsidian.
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## 🧩 Block
**SysML:** `Block`
**Traits:**
- Physical object (1)
- Man-made / synthetic (2)
- Structural (5)
- Material form (7)
- Purposeful / intentional (9)
- Emits output / effect (10)
- Part of a system (14)
**UHT Hex:** `C5040000`
**UHT Class:** _Engineered Structural Component_
---
## 🧠 Constraint Block
**SysML:** `ConstraintBlock`
**Traits:**
- Logical / rule-based (19)
- Hierarchical / modular (20)
- Contextual abstraction (24)
**UHT Hex:** `00003100`
**UHT Class:** _Mathematical or Logic Rule Entity_
---
## 📃 Requirement
**SysML:** `Requirement`
**Traits:**
- Symbolic / representational (17)
- Behavior-guiding (21)
- Regulated / governed (28)
- Defined by a group/system (26)
**UHT Hex:** `00008810`
**UHT Class:** _Governed Norm / Formal Condition_
---
## ⚙️ Interface Block
**SysML:** `InterfaceBlock`
**Traits:**
- Man-made / synthetic (2)
- Structural (5)
- Purposeful / intentional (9)
- Emits output / effect (10)
- Communicative (18)
**UHT Hex:** `44040200`
**UHT Class:** _Boundary Interface / Signal Mediator_
---
## 🔄 Activity
**SysML:** `Activity`
**Traits:**
- Purposeful / intentional (9)
- Emits output / effect (10)
- Temporal (23)
- Context-sensitive (31)
**UHT Hex:** `00030002`
**UHT Class:** _Contextual Action Flow_
---
## 🧪 Test Case
**SysML:** `TestCase`
**Traits:**
- Symbolic / representational (17)
- Purposeful / intentional (9)
- Behavior-guiding (21)
- Temporal (23)
- Regulated / governed (28)
**UHT Hex:** `00018810`
**UHT Class:** _Procedural Evaluation Unit_
---
## 🧬 Value Type
**SysML:** `ValueType`
**Traits:**
- Symbolic / representational (17)
- Logical / rule-based (19)
- Self-referential / meta-conceptual (22)
**UHT Hex:** `0000A000`
**UHT Class:** _Abstract Metric / Measurement Unit_
---
## 🧮 Parametric Equation
**SysML:** `Parameter`, `Equation`
**Traits:**
- Symbolic / representational (17)
- Logical / rule-based (19)
- Temporal (23)
**UHT Hex:** `0001A000`
**UHT Class:** _Time-Dependent Logic Structure_
---
## 🧾 Comment / Note
**SysML:** `Comment`, `Note`
**Traits:**
- Symbolic / representational (17)
- Communicative (18)
**UHT Hex:** `0000C000`
**UHT Class:** _Auxiliary Annotation / Meta Message_
---
## 🧠 UHT Bit Layers
|**Layer**|**Range**|**Purpose**|
|---|---|---|
|Physical|Bits 1–8|Tangibility, materiality, presence|
|Functional|Bits 9–16|Purpose, output, logic, criticality|
|Abstract|Bits 17–24|Symbol, rule, structure, meta-logic|
|Social|Bits 25–32|Identity, visibility, governance, norms|