Web authoring bookmarks

For starters

WWW Summary by Tim Berners-Lee
This short article explains what the Web is all about from the point of view of the man who invented the WWW. 1992.
A history of HTML by Dave Raggett, Jenny Lam, Ian Alexander and Michael Kmiec
Chapter 2 of Ragget on HTML 4. 1998. You may also buy the book from Amazon.com

HTML

HTML 4.0 Reference by the Web Design Group.
A comprehensive and reliable guide to HTML4.0.
HTML documentation by W3C
Includes normative specifications of HTML.

Cascading style sheets

Style Sheets vs. Frames as Web Extensions by Jakob Nielsen
A thoughtful comparison between style sheets and frames.
Cascading Style Sheets by W3C
The CSS pointers group
A valuable resource for style-sheet designers
CSS guide by the WDG

Tools for testing websites

HTML validation

These check the validity of syntax of HTML documents. All are based on nsgmls from James Clark's SP.

HTML Validator of WDG
Checks documents by URL and file upload. Supports many character encodings, and gives easy to understand error messages.
A Real Validator
A validator for Windows. An offline version of the above.
HTML Validator of W3C
Checks documents by URL.
WebTechs by Dan Connolly and Mark Gaither
World's first online HTML validation service

HTML checkers

Note the differences between validators and other checkers.

Webxact
Web Page Purifier by Delorie Software
This service reduces your browser to a browser conforming to an older level of HTML and/or to a character-mode browser. It simply erases from the original document all tags unknown to the specified HTML level. Following links in the output will purify the followed URL.
Web Page Backward Compatibility Viewer by Delorie Software
Similar to the purifier, but has other combinations of conformance.
Lynx Viewer by Delorie Software
Produces an imitation of the output of Lynx, a common character-mode browser. Its advantage is that it gives the layout of Lynx rather than reducing your browser to character-mode.

CSS validators and lints

Cascading Style Sheets validator by the W3C
CSSCheck by the WDG
A CSS lint

Spelling

Merriam-Webster Online
An online dictionary of English.
Your Dictionary dot com
Covers many languages.

Priniciples of Web design

Hints for Web Authors by Warren Steel
An excellent article explaining the fundamental concepts of Web authoring.
Top Ten Mistakes in Web Design by Jakob Nielsen
Some good advice from a professional.
Ten More Things to Avoid in Authoring a Web Page by Terry Sullivan
A complementary list to the above.
Style Guide for Online Hypertext by Tim Berners-Lee
An ever green classic, by the man who invented the Web.

General

W3C The World Wide Web Consortium
An international body that sets standards for most things that need standards on the Web. Lots of valuable information.
The Web Design Group
Includes a variety of reference guides, tutorials, and FAQs.
Things to do with the WWW by A.J. Flavell
A collection of articles on various Web issues including internationalization, content negotiation and caching, text friendly authoring, and stylesheets.
Web site development information by Tobias C. Brown
A highly selective references guide

Copyrights and Law

A brief intro to copyright by Brad Templeton
Ten big myths about copyright by Brad Templeton
Notes on Copyright & Related Issues from the Geometry Center at University of Minnesota
Links and Law by Tim Berners-Lee
Linking Rights by Brad Templeton

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