# Anatomy of a production rule

Production is said to be of the form $u \to v$. I want to know if you distinguish $u$ from $v$ giving them some distinguishing names, like LHS/RHS or something alike.

• What exactly is your question? This is more a request to use uniform terminology (good luck with that!). Dec 25 '15 at 15:53
• @vonbrand The question is whether there are distinguishing names for the two sides of the rule. It seems quite clear to me -- perhaps you misread it? Dec 25 '15 at 17:13
• $v$ can be said to be the production of the string $u$ by the rule at hand. Dec 27 '15 at 18:25

$u$ can be called the 'head' (or left-hand side)
$v$ can be called the 'body' (or right-hand-side)