# This is a comment header
data_test
_tag_common_to_both_files          yes
_tag_with_different_values         left
_tag_existing_only_on_left         yes
loop_
_loop_with_same_length_and_values
_loop_with_same_length_and_different_values
  1 1 2 2 3 3 4 4 5 5
loop_
_loop_with_different_length
  1 2 3 4 5
loop_
_loop_tag_question_mark
_loop_tag_dot
? .
? .
? .
_tag_question_mark ?
_tag_dot .
data_different_datanames_left
_tag_with_different_string_values  0.1
data_existing_only_on_left
# Some more comments
