Text

The plain text document format.

A proposed open standard for using rel-me links to profiles on OAuth supporting services to authenticate via either those profiles or your own site.

Sitemap

A file in XML format that allows webmasters to inform search engines about URLs on a website that are available for web crawling.

RDF

A W3C standard model to describe and exchange graph data on the web.

Markdown

A markup language used to add formatting to plain text documents.

XML

A markup language and file format for storing, transmitting, and reconstructing arbitrary data.

IDN

Internationalized Domain Names allow people around the world to use domain names in local languages, such as Arabic, Chinese, or Cyrillic.

OpenAPI

A specification language for defining HTTP APIs, typically written in YAML or JSON.

Rack

A minimal, modular interface and invocation convention that operates between Ruby web servers and web applications to standardize how HTTP requests and responses are exchanged.

JSON Web Token

An open standard (RFC 7519) that defines a compact and self-contained way for securely transmitting information between parties as a JSON object.

OpenTelemetry

A vendor- and tool-agnostic observability framework and toolkit for creating and managing telemetry data such as traces, metrics, and logs.

Humans.txt

A text file that can be created by developers to list the people who have contributed to a website.

Prerender

The rel="prerender" attribute on HTML elements.

Webmention

A simple protocol to notify any URL when a website links to it, and for web pages to request notifications when somebody links to them.

AdChoices

A self-regulatory standard for online interest-based advertising that gives consumers enhanced control over the collection and use of their data to deliver relevant ads.

LLMs.txt

A proposed standard that provides structured content and instructions to guide large language models in understanding and summarizing a website's content.