Update README.md

README.md

@@ -157,13 +157,13 @@ The corpus was created with an **open-source pipeline** [[GitHub link]](https://
 1. Processes files from local project directories (no web crawling required)
 2. Extracts and processes content through a multi-stage pipeline:
    * **HTML files**: Compacts HTML structure, extracts titles via *BeautifulSoup*, and converts body content to clean text using *html2text* with enhanced CJK character handling
-   * **PDF files**: Reads pre-converted TXT files from PDF sources
+   * **PDF files**: Reads pre-converted TXT files from Word document sources that generated the PDFs
    * **Text processing**: Removes control characters, normalizes Unicode (NFKC), handles bidirectional text spacing, and collapses excessive whitespace
 3. Runs language-aware word counting (smart algorithms for Chinese/Japanese/Korean vs. space-separated languages) and assigns domain labels based on file paths
 4. Generates:
    * `ai-culture.jsonl.gz` – **DOLMA-compatible** newline-delimited JSON
    * `ai-culture.json` – one compact record per article
-5. Performs integrity checks including JSON validation and optional datasets library loading tests
+5. Runs multi-layer integrity validation including dataset loading, structure verification, and sample inspection across all formats. Includes supplementary datasets library compatibility tests for Hugging Face Hub integration
 
 All scripts include a **zero-duplicate** guarantee. We maintain **machine-validated alignment** between languages.