Table of Contents
1 min read
A language’s syntax defines what is valid on that language. For example, is a language syntax defines that all variables must be declared as
name := value, you can’t write it as
var name = value; instead.
The syntax of a language is specified using a grammar.
Semantics attributes a meaning to valid sentences, or forms.
A grammar is a set of rules composed by:
- Non-terminal symbols
- Terminal symbols
BNS stands for Backus–Naur form and it is a notation technique to represent context-free grammars.
<..>- Non-terminal Symbols
...- Terminal Symbols
::=- Defined as…
*- Zero or more
+- One or more
<S> :: = <A>a <A> :: = a<B> <B> :: = <A>a|b
<S>, <A>, <B>
Or if you don't know what a response is, you can always write a webmention comment (you don't need to know what that is).