Transparency

Coverage

We're explicit about what our current indexing covers. Three numbers matter — each measures something different:

Surah coverage: chapters with at least one Tabari passage

114 of 114 (100%)

Tabari passages (per ayah, canonical layer)

6,226

Curated topical ayat with coverage

118 of 118 (100.0%)

Full Dutch translation of Tabari's own text (word-for-word, not a summary)

6,226 of 6,226 (100.0%)

Translated via Claude with a strict anti-softening protocol: abd → slave, rajm → stoning, no softening of violence or punishment. Isnad chains written out in full, Quran verses kept in Arabic. Tabari's full text is now translated word-for-word into Dutch.

All surahs have at least one Tabari passage. For a few short surahs (e.g. Al-Fil 105) the slice runs through transition text from a neighbouring section — those are flagged as "Inferred" to be honest about the mixed content.

Since filling the remaining gaps from Turath, every verse — including every ayah in our topical curation — has a canonical Tabari passage. Coverage is now 100%.

Our two text layers

Our tafseer text has two layers. The canonical layer — what you see in the app — is fetched per ayah from the quran.com API, with exact verse-linkage; the few verses quran.com didn't provide were filled from Turath (the same edition). Alongside it is an older, OCR-derived layer we are phasing out:

• Canonical — 6,226 passages (6,196 from quran.com + 30 from Turath, filling quran.com's remaining gaps): exact verse-linkage, no guessing. Covers all 6,236 verses of the Quran (100%) and is fully translated into Dutch. This is what the app shows.
• Legacy OCR layer, kept — 1,797 passages: OCR'd from the printed edition with fuzzy verse-linkage (verified or inferred).
• Legacy OCR layer, rejected — 1,838 passages: a language model verified the passage is actually about a different verse, due to OCR segmentation errors. These are fully filtered out of the app.

Methodology

The canonical Arabic text is fetched per ayah from the quran.com API (Dar al-Tarbiya wa-l-Turath edition: vols 1–16 following Mahmud Shakir's tahqiq, vols 17–24 the Halabi printing) and translated word-for-word into Dutch by Claude under a strict anti-softening protocol. The source text is verified against app.turath.io (the same edition); the few verses quran.com didn't provide were filled directly from Turath. Code and migrations are open and reviewable.