====== Identifiers ======
===== Definition =====
==== identifier ====
  * basic_identifier
  * extended_identifier

==== basic_identifier ====
  letter { [ underline ] letter_or_digit }

==== letter_or_digit ====
  * letter
  * digit

==== letter ====
  * upper_case_letter
  * lower_case_letter

==== extended_identifier ====
  \ graphic_character { graphic_character } \

===== Comments =====
A basic identifier must not contain any blanks!

===== Examples =====
<code vhdl>
count
x
c_out
store_next_item
\74S05\
\a\\b\
</code>