This module contains the SVG number grammar

The EBNF Grammar that describe the rules defined here is:

    numbers ::= sign? ( floating_point_constant | integer_constant )
    floating_point_constant ::= fractional_constant expoent? | digit_sequence expoent
    integer_constant ::= digit_sequence
    fractional_constant ::= '.' digit_sequence | digit_sequence '.' digit_sequence | digit_sequence '.'
    expoent ::= ( 'e' | 'E' ) sign? digit_sequence
    digit_sequence ::= digit digit*
    sign ::= '+' | '-'
    digit ::= '1' | '2' | '3' | '4' | '5' | '6' | '7' | '8' | '9' | '0'