Inbound mapper templates

The ESQL files have a well defined structure to make them easier to understand and reuse:

• Broker schema declaration¹
• Copyright block¹
• Template name and version¹
• Mapper documentation block¹
• Module scope variables:
  • Constants
  • Pseudo Constants
  • Variables
• Pseudo constants initialization procedure¹
• Mapper main function
• Mapper procedures and functions
• Mapping procedures and functions