Trace Context

Defines standard HTTP headers and a value format for propagating context information that enables distributed tracing.

XML

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

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

GraphQL

A data query and manipulation language for APIs typically used for remote client-server communications.

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.

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.

LLMs.txt

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

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.

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.

RDF

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

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.

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.

ActivityPub

A decentralized social networking protocol used by various Fediverse services such as Mastodon, Pixelfed, and PeerTube.

ESI

A simple markup language used to define web page components for dynamic assembly and delivery of web applications at the edge of the Internet.

OpenTelemetry

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

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.

XRDS

An XML-based file format that provides a list of service endpoints (e.g., OpenID) available on a website.