Contents

• Basic description and functionalities
• Adding a user subsection to an observation
  • Example
  • Detailed API
  
  
• Reading a user section from an observation
• Adding hooks to the Class commands
  • User hook for command DUMP
  • User hook for command SET VARIABLE USER
  • User hook for command FIND
  • API summary
  
  
• Extending the standard CLASS capabilities
• Backward compatibility
• Portability
• Conclusion
• Implementation details for CLASS developers