Trace Context

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

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.

Markdown

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

RelMeAuth

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.

Humans.txt

A plain text file that allows website creators to identify and credit the people involved in developing a website.

Text

The plain text document format.

Sass

A stylesheet language that compiles to CSS and allows developers to use variables, nested rules, mixins, and functions.

OpenAPI

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

XML

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

ActivityPub

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

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.

CGI

An interface specification that enables web servers to execute an external program to process HTTP requests.

Prerender

A deprecated browser hint that instructed web browsers to preload and render a web page in the background before navigation occurred.

A non-proprietary protocol for encrypting email using public key cryptography.

Onion

Sites are websites that use the .onion top-level domain and are only accessible through Tor, a decentralized anonymity network that relays traffic to hide the IP addresses of both visitors and hosts.

XRDS

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

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.

OpenTelemetry

An open-source, vendor-neutral observability framework and toolkit for collecting, processing, and exporting telemetry data such as traces, metrics, and logs.