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CC Window Aligner: System Glossary

| Aspect | Definition | |--------|------------| | **What it is** | A fixed-length segment of aligned, fused motion data with deterministic semantics. The atomic unit of motion truth consumed by downstream modules. | | **What it is NOT** | Raw sensor data. A prediction. A variable-length sequence. An approximation. | | **Layer** | Runtime (output of Aligner, input to cc-anticipation) | | **Stability** | FROZEN after v0.1.0 lock. Schema changes require major version bump. |

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| Aspect | Definition | |--------|------------| | **What it is** | A fixed-length segment of aligned, fused motion data with deterministic semantics. The atomic unit of motion truth consumed by downstream modules. | | **What it is NOT** | Raw sensor data. A prediction. A variable-length sequence. An approximation. | | **Layer** | Runtime (output of Aligner, input to cc-anticipation) | | **Stability** | FROZEN after v0.1.0 lock. Schema changes require major version bump. | | Aspect | Definition | |--------|------------| | **What it is** | A single frame of fused skeletal pose data at a canonical timestamp. Contains joint positions, orientations, and provenance metadata. | | **What it is NOT** | Raw mocopi data. Device-specific coordinates. Interpolated without marking. | | **Layer** | Runtime (internal to MotionWindow) | | **Stability** | FROZEN after v0.1.0 lock. | | Aspect | Definition | |--------|------------| | **What it is** | A monotonic time axis shared across all devices in a session. Defined relative to a reference clock (host or designated transmitter). | | **What it is NOT** | Wall-clock time. Device-local timestamps. UTC. | | **Layer** | Conceptual / Runtime | | **Stability** | Definition stable. Implementation may vary per session. | | Aspect | Definition | |--------|------------| | **What it is** | A bitmask indicating which devices contributed to a MotionWindow or SkeletonFrame. | | **What it is NOT** | A quality indicator. A list of all available devices. | | **Layer** | Runtime | | **Stability** | Bit positions are FROZEN per device type. | | Aspect | Definition | |--------|------------| | **What it is** | Metadata indicating which device(s) contributed to each degree of freedom in a SkeletonFrame, including interpolation flags. | | **What it is NOT** | A confidence score. A reliability metric. | | **Layer** | Runtime | | **Stability** | Schema stable after lock. |

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