# Glossary - Stephan Maximilian Huber

Plain-language definitions of terms used across the photography and technology writing on this site.

## AI & software

- **Agent** - A system that uses reasoning and tool use to act on behalf of a person or program, often pairing an LLM with abilities like code execution or browsing.
- **Content negotiation** - A server feature that returns different representations of the same resource (HTML or Markdown) based on the client Accept header.
- **JSON-LD** - A JSON-based format for embedding structured, linked data in a page that search engines and agents can parse.
- **llms.txt** - A convention for publishing a Markdown index of a site so LLM crawlers can discover content.
- **robots.txt** - A file that tells cooperative crawlers which paths they may fetch.

## Photography

- **Alt text** - A written description of an image content, used by assistive technology and crawlers.
- **Focal point** - The visually important region of an image, used to choose crops at different aspect ratios.
- **Genetic algorithm** - An optimization method inspired by natural selection, used to reconstruct portraits from colored polygons.

## Platform

- **Static site** - A website whose pages are pre-built into plain HTML and served directly without a server-side application.
- **Sitemap** - A machine-readable list of a site pages that helps crawlers find content.