# zxyle/PDF-Explained

《PDF 解析》

Repository: https://github.com/zxyle/PDF-Explained
Canonical: https://ross.abutalabs.com/products/pdf-explained
Homepage: https://zxyle.github.io/PDF-Explained/
License: MIT
License Family: permissive
Topics: pdf, oreilly-books, chinese-translation, explained, pdftk, john-whitington
Last push: 2026-05-29T14:26:30+00:00

## Health v2 (maintenance only)
Score: 70/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 84, release rhythm 35, longevity 100
- inputs: {"age_days": 2672, "days_push": 96, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1120, forks 130 (observed 2026-08-28T04:03:39.787644+00:00)

## What it is
An unofficial Chinese translation of the O'Reilly book 'PDF Explained' by John Whitington, published as Markdown chapters and a hosted website. It teaches the PDF file format hands-on, from building PDFs in a text editor to encryption and command-line processing with pdftk.

## Use cases
- learn how the pdf file format works internally
- understand pdf file structure and object syntax
- build a simple pdf file from scratch in a text editor
- learn how pdf encryption and permissions work
- process pdfs from the command line with pdftk
- read a chinese translation of pdf explained

## When to choose
- you want a beginner-friendly introduction to the PDF format
- you prefer reading in Chinese
- you are a programmer or professional needing hands-on PDF internals knowledge

## When to avoid
- you need a PDF manipulation library or tool rather than a book
- you need the complete official English text with no translation gaps
- you need up-to-date PDF 2.0 coverage

## Facets
- artifact type: learning-resource
- maturity: active
- function: documentation, pdf
- domain: pdf, documentation, education
- platform: -
- tags: chinese-translation, book, oreilly, pdf-format, pdftk, web-server

## Member repositories
- zxyle/PDF-Explained (main) score 70

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:39.787644+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:41:08.241867+00:00, confidence not recorded.
  - readme: https://github.com/zxyle/PDF-Explained (fetched 2026-08-28T04:03:39.787644+00:00, sha d1e3658c09b7)
  - homepage: https://zxyle.github.io/PDF-Explained/ (fetched 2026-08-29T12:45:17.193468+00:00, sha d917cd0d9209)
- Data as of 2026-08-30T08:39:29.467469+00:00.