2.Terminology
| Term | Meaning |
|---|---|
| IPL vector (P) | The complete ordered parameter vector defined by this standard. |
| Dimension / parameter | One named scalar of P. |
| Group | A named partition of dimensions (§3.1). |
| DOF | Degrees of freedom contributed by a parameter or group. |
| Pose (articulation) | The base configuration: what the body is doing. |
| Expression (affect) | An additive layer on affect groups: how it is coloured (§3.3). |
| Hyper condition | A named discrete/conditional channel carried alongside P that conditions the decode — NOT a latent dimension (§3.4). Currently: eye look-at, viseme, contact, anchor. |
| Body site | A named reference point on the decoded body (per-rig calibrated bone + offset → world point) — the domain of the contact and anchor hyper conditions (§3.4). |
| Post-processing | The final decode stage: applied on the fully decoded pose (pose ⊕ expression → rig), after all latent decoding (§3.4). |
| Producer | Any implementation that emits P (encoder or human tool). |
| Consumer | Any implementation that reads P (renderer, exporter, analyser). |
The key words MUST, MUST NOT, SHOULD, MAY are to be interpreted as in RFC 2119.