A backward-compatible CSS language extension inspired by Sass that supports variables, mixins, operations, and functions.

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.

Text

The plain text document format.

Markdown

A lightweight markup language used to add formatting to plain text documents using simple, human-readable syntax.

OpenAPI

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

RDF

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

Prerender

The rel="prerender" attribute on HTML elements.

LLMs.txt

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

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.

Humans.txt

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

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.

XML

A markup language and file format for storing, transmitting, and reconstructing structured data in a platform-independent way.

WebAssembly

A portable binary instruction format that runs in modern web browsers with near-native performance, enabling frontend coding in languages that were not traditionally used for web interfaces, such as C/C++, C#, and Rust.

XMP

An ISO standard for creating, processing, and exchanging metadata for digital documents.

IDN

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