Specification Overview
HEXT v2.2.0 — Semantic Object Graph Standard
Canonical Model
HEXT is a Semantic Object Graph. Semantic XML is its canonical serialization.
Five Fields
| Field | Purpose | Required |
|---|---|---|
object | Identity and metrics | Yes |
provenance | Lineage and agency | Yes |
semantic | Instrument EXIF | No |
ledger | Edit chain | Yes |
final_seal | Integrity seal | Yes |
Serialization Hierarchy
Only Semantic XML is canonical. Markdown, HTML, JSON, and binary are projections.
Integrity
Documents are sealed with SHA-256 state hashes after Canonical XML normalization. Pre-v2.1.0 documents retain grandfather hash rules.