Arbortext is the maker of the world's leading high-end composition engines, including 3B2, Epic, and E3.

A rich mix of information and services for the XML community. The site is designed to serve both people who are already working with XML and those HTML users who want to 'graduate' to XML's power and complexity.

O'Reilly is the publisher of a number of xml publications aimed at both the novice xml user and the seasoned veteran.

The Society for Technical Communication is an individual membership organization dedicated to advancing the arts and sciences of technical communication. It is the largest organization of its type in the world.

Altova provides tools and utilities for working with all XML technologies.

ZVON.org is an xml related web site offering free tutorials in a number of x-technology standards (XML, XPATH, XSL, etc.).

W3C has published more than forty Recommendations since its inception. Each Recommendation not only builds on the previous, but is designed so that it may be integrated with future specifications as well. W3C is transforming the architecture of the initial Web (essentially HTML, URIs, and HTTP) into the architecture of tomorrow's Web, built atop the solid foundation provided by XML.

Organization for the Advancement of Structured Information Standards

The Cover Pages is a comprehensive Web-accessible reference collection supporting the SGML/XML family of (meta) markup language standards and their application.