README.md

# Learning Books Repack Directory

This directory contains the repacked learning books archive set, the search manifest, and the summary report.

## Files

- `data/`: ZIP package directory. Each ZIP file is independent and can be opened or extracted on its own.
- `data/ebooks-0001.zip`, `data/ebooks-0002.zip`, and so on: ZIP packages that preserve the original archive entry names, for example `category/book-title.pdf`.
- `manifest.sqlite`: SQLite database for finding which ZIP package contains a file. It also stores size, compressed size, CRC32, modification time, extension, type category, subject category, and top-level folder metadata.
- `report.html`: Standalone HTML report with file type, subject, size, deduplicated title/version, top-level folder, and ZIP package statistics. Charts are embedded as base64 data URIs.
- `README.md`: This guide.

## manifest.sqlite Tables

- `packages`: One row per ZIP package, including `rel_path`, `zip_size`, `uncompressed_size`, `compressed_size`, and `file_count`.
- `files`: One row per source file, including `path`, `zip_path`, `entry_name`, `size`, `compressed_size`, `crc32`, `mtime_utc`, `extension`, `type_category`, `subject_category`, and `top_dir`.
- `duplicate_paths`: Diagnostic records for duplicate exposed archive paths. The duplicate path was packaged once.

## Manifest Examples

```sql
-- 1. Find which ZIP package contains a file.
SELECT path, zip_path, entry_name
FROM files
WHERE path LIKE '%keyword%';

-- 2. Count files and total size by extension.
SELECT extension, COUNT(*) AS file_count, SUM(size) AS total_size
FROM files
GROUP BY extension
ORDER BY file_count DESC;

-- 3. List ZIP package sizes.
SELECT rel_path, file_count, zip_size
FROM packages
ORDER BY rel_path;

-- 4. List the largest PDF files.
SELECT path, zip_path, size, mtime_utc
FROM files
WHERE extension = '.pdf'
ORDER BY size DESC
LIMIT 50;

-- 5. Filter books by subject category.
SELECT subject_category, path, zip_path
FROM files
WHERE subject_category = '<subject_category>'
ORDER BY path
LIMIT 100;

-- 6. Check duplicate exposed archive paths.
SELECT path, note
FROM duplicate_paths
ORDER BY path;
```