Table of contents

• Introduction
• Maintainability
• Modularity
• Minimum redundancy
• Accessibility
• Device-independency
• Internationality
• Extensibility
• Learnability
• Readability
• Efficiency
• Binary or text format
• Implementability
• Simplicity
• Longevity
• Backwards compatibility
• Interoperability
• Repurposing of content
• Timeliness
• Use what is there
• Design by committee
• Expertise
• Brevity
• Stability
• Robustness