# pdf-association/pdf20examples architecture

> Architecture diagram of the GitHub repository pdf-association/pdf20examples, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-11-12). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/pdf-association/pdf20examples
- Repository: https://github.com/pdf-association/pdf20examples

## Overview

This repository is a collection of educational PDF 2.0 documents, not an executable application. Its principal use is to open an example in a PDF processor and inspect whether the documented PDF 2.0 feature is interpreted correctly. The examples cover text and annotations, file structure and updates, and rendering and color. The README documents these purposes; no source excerpts are available, so the graph shows documented artifact-to-processor relationships rather than internal processing steps.

Main entry points: [`pdf20-utf8-test.pdf`](https://github.com/pdf-association/pdf20examples/blob/master/pdf20-utf8-test.pdf) (UTF-8 text test), [`PDF 2.0 UTF-8 string and annotation.pdf`](https://github.com/pdf-association/pdf20examples/blob/master/PDF%202.0%20UTF-8%20string%20and%20annotation.pdf) (UTF-8 annotation), [`Simple PDF 2.0 file.pdf`](https://github.com/pdf-association/pdf20examples/blob/master/Simple%20PDF%202.0%20file.pdf) (Basic PDF 2.0), [`PDF 2.0 via incremental save.pdf`](https://github.com/pdf-association/pdf20examples/blob/master/PDF%202.0%20via%20incremental%20save.pdf) (Incremental save)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_text["Text and annotations"]
  node_utf8_test["UTF-8 text test"]
  node_utf8_annotation["UTF-8 annotation"]
end

subgraph group_structure["Document structure"]
  node_simple_pdf["Basic PDF 2.0"]
  node_incremental["Incremental save"]
  node_offset_start["Offset start"]
end

subgraph group_rendering["Rendering and color"]
  node_image_bpc["Image BPC"]
  node_page_intent["Page output intent"]
end

node_processor(("PDF processor"))

node_utf8_test -->|"evaluates UTF-8"| node_processor
node_utf8_annotation -->|"interprets strings"| node_processor
node_simple_pdf -->|"interprets content"| node_processor
node_incremental -->|"parses updates"| node_processor
node_offset_start -->|"parses offset"| node_processor
node_image_bpc -->|"renders color"| node_processor
node_page_intent -->|"interprets intent"| node_processor

click node_utf8_test "https://github.com/pdf-association/pdf20examples/blob/master/pdf20-utf8-test.pdf"
click node_utf8_annotation "https://github.com/pdf-association/pdf20examples/blob/master/PDF%202.0%20UTF-8%20string%20and%20annotation.pdf"
click node_simple_pdf "https://github.com/pdf-association/pdf20examples/blob/master/Simple%20PDF%202.0%20file.pdf"
click node_incremental "https://github.com/pdf-association/pdf20examples/blob/master/PDF%202.0%20via%20incremental%20save.pdf"
click node_offset_start "https://github.com/pdf-association/pdf20examples/blob/master/PDF%202.0%20with%20offset%20start.pdf"
click node_image_bpc "https://github.com/pdf-association/pdf20examples/blob/master/PDF%202.0%20image%20with%20BPC.pdf"
click node_page_intent "https://github.com/pdf-association/pdf20examples/blob/master/PDF%202.0%20with%20page%20level%20output%20intent.pdf"

classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a
classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554
classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f
classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d
classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337
classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81
classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a
class node_utf8_test,node_utf8_annotation toneBlue
class node_simple_pdf,node_incremental,node_offset_start toneAmber
class node_image_bpc,node_page_intent toneMint
class node_processor toneIndigo
```

## Components

### Text and annotations

- [UTF-8 text test](https://github.com/pdf-association/pdf20examples/blob/master/pdf20-utf8-test.pdf): `pdf20-utf8-test.pdf`
- [UTF-8 annotation](https://github.com/pdf-association/pdf20examples/blob/master/PDF%202.0%20UTF-8%20string%20and%20annotation.pdf): `PDF 2.0 UTF-8 string and annotation.pdf`

### Document structure

- [Basic PDF 2.0](https://github.com/pdf-association/pdf20examples/blob/master/Simple%20PDF%202.0%20file.pdf): `Simple PDF 2.0 file.pdf`
- [Incremental save](https://github.com/pdf-association/pdf20examples/blob/master/PDF%202.0%20via%20incremental%20save.pdf): `PDF 2.0 via incremental save.pdf`
- [Offset start](https://github.com/pdf-association/pdf20examples/blob/master/PDF%202.0%20with%20offset%20start.pdf): `PDF 2.0 with offset start.pdf`

### Rendering and color

- [Image BPC](https://github.com/pdf-association/pdf20examples/blob/master/PDF%202.0%20image%20with%20BPC.pdf): `PDF 2.0 image with BPC.pdf`
- [Page output intent](https://github.com/pdf-association/pdf20examples/blob/master/PDF%202.0%20with%20page%20level%20output%20intent.pdf): `PDF 2.0 with page level output intent.pdf`

### Other components

- **PDF processor**

## Connections

- UTF-8 text test → PDF processor: evaluates UTF-8 (evidence: `README.md`)
- UTF-8 annotation → PDF processor: interprets strings (evidence: `README.md`)
- Basic PDF 2.0 → PDF processor: interprets content (evidence: `README.md`)
- Incremental save → PDF processor: parses updates (evidence: `README.md`)
- Offset start → PDF processor: parses offset (evidence: `README.md`)
- Image BPC → PDF processor: renders color (evidence: `README.md`)
- Page output intent → PDF processor: interprets intent (evidence: `README.md`)