In computer science, SYNTAX is a system used to generate lexical and syntactic analyzers (parsers) (both deterministic and non-deterministic) for all kinds of context-free grammars (CFGs) as well as some classes of contextual grammars. It has been developed at INRIA (France) for several decades, mostly by Pierre Boullier, but has become free software since 2007 only. SYNTAX is distributed under the CeCILL license.

In linguistics, syntax () is the set of rules, principles, and processes that govern the structure of sentences in a given language, specifically word order. The term syntax is also used to refer to the study of such principles and processes. The goal of many syntacticians is to discover the syntactic rules common to all languages.