Markup Validation Service

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Other Tools

• Site Valet
• WDG Validator
• CSS Validator
• Link Checker
• HTML Tidy
• Tidy Online

Markup Standards

• XHTML 1.1
• XHTML 1.0
• HTML 4.01

Style Standards

• XSL 1.0
• CSS Level 2
• CSS Level 1

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