Syntax can look back on a long tradition. The term itself is ambiguous. On the one hand, it is understood as a means of structural and descriptive analysis of individual languages using clearly defined instruments. Naturally, syntactic analyses can be comparative, spanning several languages. On the other hand, syntax is understood as syntactic theory, the aim of which is to decide which instruments can be sensibly applied to syntactic analysis. Syntactic theory thus defines the aims of syntactic research.