• General assumptions about user agent
• General design goals
• General requirements
• Payment Scenarios
• Requirements
• Shipping Information
• Assumptions
• Requirements
• Questions
• Additional Payment Request Information
• Requirements
• Payment Method Identifiers
• Requirements
• Version information
• Assumptions
• Requirements
• Questions
• Payment Application Registration
• Requirements
• Questions
• Mediator Display
• Requirements
• Security
• Miscellaneous Notes