This part of ISO 6937
a) defines a repertoire of Latin alphabetic and non-alphabetic characters for the communication of text in Euro-pean languages;
b) specifies coded representations for the graphic characters;
c) specifies rules for the definition and use of graphic character subrepertoires, i.e. subsets of the defined character repertoire.
It also gives, in annexes,
a) definitions of three standard subrepertoires (annex A);
b) a summary of the use of non-spacing diacritical marks in combination with the letters of the basic Latin alphabet (annex B);
c) a description of the use of the non-spacing underline character (annex C);