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Case Study: Bṛhadāraṇyaka-Upaniṣad I.4 (Synoptic Edition)

Multilateral philological alignment of three textual witnesses (Devanagari, IAST, 2 German translations) into a 33-page synoptic edition and interactive QA viewer.

🔗 Project Repository: github.com/birchville-org/brhadaranyaka

1. Context & Challenge

Unlike standard unilinear book digitization (scanned pages => sandwich PDF), reading Bṛhadāraṇyaka-Upaniṣad I.4 (Mādhyandina recension: The Ur-Subject and creation myth) required the synoptic synchronization of three disparate sources:

  1. Canonical Sanskrit Text: Scholarly IAST transliteration by Anna Esposito.
  2. Walter Slaje (2009): Upanischaden: Arkanum des Veda (Insel Verlag) offering modern philosophical translation, terminology (Ursubjekt), and a 36-entry philological commentary.
  3. Otto von Böhtlingk (1889): Bṛhadāraṇjakopanishad in der Mādhyandina-Recension (St. Petersburg) providing the historical critical edition and notes.

2. Implementation Steps

  1. Multimodal AI OCR (mistral-ocr-latest):
  2. Extracted Böhtlingk 1889 (12 pages) and Slaje 2009 (15 pages).
  3. Structured translation pages (pp. 108–117) and philological commentary (pp. 482–493).
  4. Canonical Alignment:
  5. Aligned all sources across 31 semantic sections (1.4.1 to 1.4.31).
  6. Generated ligature-safe Devanagari with danda formatting.
  7. Repository Decoupling:
  8. Following the boethlingk model, all artifacts were transferred to the dedicated repository birchville-org/brhadaranyaka.

3. Output Formats in the Edition Repository

  • QA Viewer (viewer.html): Interactive split-pane editor adhering to the Payer Global Web Editor Standard with silent auto-repair and diacritics bar.
  • Restored Facsimile Sandwich (slaje2009.perfect_sandwich.pdf): 15-page high-end facsimile (2.28 MB) with Content-Aware Margin Masking via AlexandriaSandwich v1.7.0.
  • Typeset PDF (brhadaranyaka_1_4_synopsis.pdf): 33-page scholarly publication via WeasyPrint.
  • TEI-P5 XML (brhadaranyaka_1_4.tei.xml): Standard archival format with parallel alignment.
  • EPUB 3 (brhadaranyaka_1_4.epub): Reflowable eBook with embedded fonts (Noto Serif Devanagari & Linux Libertine O).
  • Master JSON (brhadaranyaka_1_4_master.json): Single Source of Truth AST.
  • Release: Compiled and published live as brhadaranyaka v1.1.0.