بِسْمِ ٱللَّٰهِ ٱلرَّحْمَٰنِ ٱلرَّحِيمِ
IPSC v4.0.0 · June 2026The Islamic Primary Source Corpus.
667,153
structured, attributed, watermarked documents
Explore through Theo Full IPSC site — methodology, collections, research, citation →The foundation.
القرآن الكريم
Quran
6,236
ayat
Complete Quranic text with full Arabic vowelization, byte-verified against the Tanzil.net reference standard.
الحديث النبوي
Hadith
617,912
narrations
Across 123 works spanning 13 tiers of scholarly authority with structured narrator chains and attributed grades.
علم الرجال
Rijal
26,923
narrators
Canonical narrator records resolved from 20 classical biographical dictionaries spanning 600 years of hadith scholarship.
علل الحديث
Ilal
16,082
defect analyses
Chain defect analyses from 8 specialist works documenting hidden transmission problems in hadith narrations.
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Live query against the same Azure AI Search indexes Theo uses at chat.theogrid.ai. Filter by collection, grade, or content type. No signup, no signin — the public corpus is genuinely public.
Rigor at every stage.
3
Independent sources
18
Enrichment stages
135K+
Validation tests
SHA-256
Watermarked
Honest grading across 617,912 hadith.
22% not graded — rather than force a classification, the corpus openly marks these narrations as ungraded. This reflects scholarly honesty: acknowledging the limits of current verification rather than overstating certainty.
Every chain for a statement, in one view.
Evidence Map assembles every chain for a given statement across all 123 works into one view: cross-collection corroboration, per-position narrator confidence, verbatim critic verdicts per source, and the computed grade with every override. A chain fails on its weakest link; a statement strengthens on its strongest corroborating chain.
What's new.
+168,516
documents added in v4.0.0
99.4%
isnad/matn separation rate
480,334
hadith with attributed grades
110,655
structured narrator chains
3
new rijal works (Ibn Ma'in)
1,228
Asbab al-Nuzul entries
Figures as announced for v4.0.0. They are release deltas, not current totals — and the narrator unit changed after this release (assessments became canonical persons), so v4.0.0’s document total is not directly comparable to the 667,153 published above.
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بِسْمِ ٱللَّٰهِ ٱلرَّحْمَٰنِ ٱلرَّحِيمِ
Explore the corpus through Theo.
I'm here. Ask me anything about Islam. Every source cited. Every chain parsed.
Ask about any hadith, ruling, or scholar…617,912 hadith cataloged · 480,334 graded (77.7%) · 95.8% Bukhari convergence