\begin{definition}[Definition:Formal Language/Alphabet]
Let $\LL$ be a formal language.
The '''alphabet''' $\AA$ of $\LL$ is a set of symbols from which collations in $\LL$ may be constructed.
An '''alphabet''' consists of the following parts:
:The letters
:The signs.
Depending on the specific nature of any particular formal language, these too may be subcategorized.
{{transclude:Definition:Formal Language/Alphabet/Letter
  |section = def
  |title = Letter
  |link = true
  |header = 3
  |increase = 1
}}
{{transclude:Definition:Formal Language/Alphabet/Sign
  |section = def
  |title = Sign
  |link = true
  |header = 3
  |increase = 1
}}
{{transclude:Definition:Formal Language/Alphabet/Primitive Symbol
  |section = def
  |title = Primitive Symbol
  |link = true
  |header = 3
  |increase = 1
}}
\end{definition}