# Data dictionary

| Field | Meaning |
|---|---|
| `id` | Unique session-local node/edge identifier |
| `kind` | `publication`, `claim`, `indicator`, or `hypothesis` |
| `title` | Human-readable record title or research statement |
| `origin` | User-provided, Crossref, World Bank, or fictional demo |
| `doi` | Normalized DOI, if available; not a guarantee of validity |
| `url` | HTTP(S) link to the original DOI/indicator source |
| `year` | Recorded publication or observed indicator year |
| `value` | Numeric indicator observation, with `unit` |
| `from` / `to` | Directed relationship source and target node IDs |
| `relation` | Researcher-specified supports/challenges/context label |
| `excerpt` | User-entered passage or explicitly fictional sample excerpt |
| `locator` | Page, section, table or other source-level locator |
| `review` | `unverified`, `researcher-checked`, or `fictional` in demo |
| `schemaVersion` | Portable session JSON schema revision |
| `notes` | Additional session methods notes |

Do not treat fields named `review` or `origin` as third-party certification. No automatic full-text semantic model runs in this release.