Web Style Guidelines

Here are some excellent notes from the W3C:

• http://www.w3.org/Provider/Style/

Web pages should always include a DOCTYPE header with markup that conforms to the selected standard. Checking pages with a validation service is an excellent way to quickly verify your markup:

• http://validator.w3.org/

• http://jigsaw.w3.org/css-validator/

See also: Automatic HTML Validation