# Page Not Found

The URL `version-4.0.0-2022-april` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [Version 4.0.0 (2022-April)](https://news.telosys.org/version-4.0.0.md)
- [Version 4.3.0 (2025-November)](https://news.telosys.org/version-4.3.0.md)
- [Version 4.2.0 (2024-November)](https://news.telosys.org/version-4.2.0.md)
- [Version 4.1.0 (2023-August)](https://news.telosys.org/version-4.1.0.md)
- [Version 4.1.1 (2024-January)](https://news.telosys.org/version-4.1.1.md)

## How to find the correct page

If the exact page cannot be found, you can still retrieve the information using the documentation query interface.

### Option 1 — Ask a question (recommended)

Perform an HTTP GET request on the documentation index with the `ask` parameter:

```
GET https://news.telosys.org/version-4.0.0.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

### Option 2 — Browse the documentation index

Full index: https://news.telosys.org/sitemap.md

Use this to discover valid page paths or navigate the documentation structure.

### Option 3 — Retrieve the full documentation corpus

Full export: https://news.telosys.org/llms-full.txt

Use this to access all content at once and perform your own parsing or retrieval. It will be more expensive.

## Tips for requesting documentation

Prefer `.md` URLs for structured content, append `.md` to URLs (e.g., `/version-4.0.0.md`).

You may also use `Accept: text/markdown` header for content negotiation.