| Asset | Reusable GLB bytes and metadata, not a scene instance |
| AssetManifest | Immutable versioned deterministic geometry/evidence record |
| Archetype | Semantic expectation/profile, not measured geometry |
| Pin | Explicit immutable dependency revision |
| Instance / identity | One scene object / its stable UUID |
| Alias / label | Textual reference name / human-facing display text |
| CST | Concrete syntax tree retaining spans and source structure |
| SemanticProgram | Typed meaning before final projection |
| SceneDocumentV2 | Engine-neutral compiled semantic and resolved scene |
| Project envelope | Draft, accepted source, pins, versions and revision metadata |
| Normalization | Non-destructive mapping from imported geometry to chosen scene dimensions/orientation |
| Relation residual | Measured difference between requested and resolved relationship |
| WRIGHT frame | Rigid room transform that places local contents in the world |
| Portal | Topological connection with explicit aperture and passage evidence |
| RIDLEY cue | Timed directing instruction with stable cue ID |
| Experience | State/control/event program layered over the same world |
| WorldPack | Reusable pinned library/runtime distribution format, not a second asset registry |
| Projector | Static Three.js projection and owned-resource lifecycle |
| Runtime | Transient playback/interaction state separate from authored intent |