$ capsinfo
The 'CAPS Configuration Directory' is: '/etc/caps'
The 'CAPS Printer Driver Database Directory' is: '/usr/share/caps/drivers'
The 'CAPS Printer Driver Configuration Directory' is: '/etc/caps/drivers'
The 'CAPS Printer Driver Executables Directory' is: '/usr/libexec/caps'
The 'CAPS Printer Device Database Directory' is: '/var/lib/caps'
The 'CAPS Document Storage Directory' is: '/var/spool/caps'

This tool provides more info with the --verbose option:

$ capsinfo --verbose
The 'CAPS Configuration Directory' is: '/etc/caps'
 Contains the base configuration INI files for various CAPS universe components
 For testing purposes you can overwrite this path with the environment variable 'CAPS_CONFIG_DIR'
The 'CAPS Printer Driver Database Directory' is: '/usr/share/caps/drivers'
 Contains the descriptive INI files of installed printer drivers
 For testing purposes you can overwrite this path with the environment variable 'CAPS_PRINTER_DRIVER_DB_DIR'
The 'CAPS Printer Driver Configuration Directory' is: '/etc/caps/drivers'
 Contains the feature INI files of installed printer drivers
 For testing purposes you can overwrite this path with the environment variable 'CAPS_DRIVER_CONFIGURATION_DIR'
The 'CAPS Printer Driver Executables Directory' is: '/usr/libexec/caps'
 Contains the printer driver executables
 For testing purposes you can overwrite this path with the environment variable 'CAPS_DRIVER_DIR'
The 'CAPS Printer Device Database Directory' is: '/var/lib/caps'
 Contains the printer device INI database and INI files of known printer devices
 For testing purposes you can overwrite this path with the environment variable 'CAPS_PRINTER_DEVICE_DB_DIR'
The 'CAPS Document Storage Directory' is: '/var/spool/caps'
 Used to store all printing documents in a temporary manner
 For testing purposes you can overwrite this path with the environment variable 'DOCUMENT_STORAGE_DIR'

Note: The "For testing purposes…" sentences you can only see, if debugging was enabled when compiling the project.