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

A set of criteria defined by the independent Acceptable Ads Committee that allows publishers to reach ad-blocking users with respectful, non-intrusive and relevant ads.

RDF

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

Markdown

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

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.

XML

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

Humans.txt

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

OpenAPI

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

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.

Prerender

The rel="prerender" attribute on HTML elements.

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.

IDN

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

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.

LLMs.txt

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

WCAG

The Web Content Accessibility Guidelines are an international standard developed by the W3C that defines how to make web content, including text and media, accessible to people with disabilities.

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.

OpenTelemetry

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

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.

XMP

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