installing package configuration files: FILES or EXPORT

Usage
1

From the tutorial:

# generate the config file that includes the exports
# creates the file in the build tree
configure_package_config_file(${CMAKE_CURRENT_SOURCE_DIR}/Config.cmake.in
  "${CMAKE_CURRENT_BINARY_DIR}/MathFunctionsConfig.cmake"
  INSTALL_DESTINATION "lib/cmake/MathFunctions"
  )

# AnyNewerVersion or SameMajorVersion?
write_basic_package_version_file(
  "${CMAKE_CURRENT_BINARY_DIR}/MathFunctionsConfigVersion.cmake"
  VERSION "${Tutorial_VERSION_MAJOR}.${Tutorial_VERSION_MINOR}"
  COMPATIBILITY AnyNewerVersion
)

#actually copy the files
install(FILES
  ${CMAKE_CURRENT_BINARY_DIR}/MathFunctionsConfig.cmake
  ${CMAKE_CURRENT_BINARY_DIR}/MathFunctionsConfigVersion.cmake
  DESTINATION lib/cmake/MathFunctions
  )

Shouldn’t it be install(EXPORT...? why?

regards
A.