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shard-wiki/research/README.md
tegwick 64796f7b3a research: Notion deep dive (closed block-DB SaaS, external REST API only, database-as-pages); UC-57/58/59
The closed/hosted/schema-rich extreme: everything is a block (UUID id,
type, properties, ordered child content, single parent), pages are blocks
and database rows are pages with a schema, Postgres-backed hosted SaaS.
Databases add typed properties + relations + rollups + formulas across
many views = the apex of wiki-page-as-structured-record. Extension model
has no in-app plugin runtime; the only extensibility is the external REST
API (+ webhooks 2026) inside a tight envelope (~3 rps, eventual
consistency, recursive child fetch, scoped/revocable per-page grants).
Adds the third attachment mode (external-API-only) alongside file-store
(Obsidian/TWiki) and in-engine host (Roam/XWiki); Notion enforces no
silent remote mutation via scoped grants. Added UC-57 (attach closed
external-API-only shard w/ operational envelope + scoped grant), UC-58
(typed database w/ schema+relations+views, no flattening), UC-59
(lossy-aware translation w/ fidelity report); enriched
UC-31/34/36/39/50/51/52/54/56. Boundary: one external-API candidate shard,
best as projection/mirror/overlay/backup, not a substrate and not the
federation layer.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-06-14 13:44:09 +02:00

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# research/
Exploration results for the problem and solution space.
Each exploration uses a `yymmdd-` prefix on the markdown file or subdirectory
when multiple files or sources are involved. Findings here inform `spec/` and
`SCOPE.md`; they do not directly authorize implementation until promoted.
## Active Explorations
| Date | Path | Summary |
|------|------|---------|
| 2026-06-08 | `260608-yawex-prior-art/` | yawex 0.7.4 Perl wiki prior art; federation design seeds |
| 2026-06-08 | `260608-c2-wiki-origins/` | Ward Cunningham & WikiWikiWeb origins; terms and use cases |
| 2026-06-08 | `260608-federation-concepts/` | Federated Wiki, git/ActivityPub/Xanadu federation models |
| 2026-06-08 | `260608-wikiengines-overview/` | Wiki engine landscape survey (Perplexity-assisted) |
| 2026-06-13 | `260613-xwiki-deep-dive/` | XWiki impl, extension interfaces, ecosystem; UC-38/39 |
| 2026-06-13 | `260613-twiki-deep-dive/` | TWiki impl, plugin API, ecosystem; UC-40/41 |
| 2026-06-13 | `260613-foswiki-deep-dive/` | Foswiki store abstraction, extension API; UC-42/43 |
| 2026-06-14 | `260614-xanadu-deep-dive/` | Project Xanadu — EDL/reference-not-copy, transclusion, addressing; UC-44/45/46 |
| 2026-06-14 | `260614-zigzag-deep-dive/` | ZigZag/zzstructure — information space as orthogonal dimensions; UC-47/48/49 |
| 2026-06-14 | `260614-roam-deep-dive/` | Roam Research — block-graph DataScript DB, transclusion, datalog, Roam Depot extension API; UC-50/51/52 |
| 2026-06-14 | `260614-obsidian-deep-dive/` | Obsidian — file-over-app vaults, plugin API, ecosystem-popularity → UC signal; UC-53/54/55/56 |
| 2026-06-14 | `260614-notion-deep-dive/` | Notion — closed block-DB SaaS, external REST API only, database-as-pages; UC-57/58/59 |