The Port-Royal Grammar (originally Grammaire générale et raisonnée contenant les fondemens de l'art de parler, expliqués d'une manière claire et naturelle, "General and Rational Grammar, containing the fundamentals of the art of speaking, explained in a clear and natural manner") was a milestone in the analysis and philosophy of language.
Published in 1660 by Antoine Arnauld and Claude Lancelot, it was the linguistic counterpart to the Port-Royal Logic (1662), both named after the Jansenist monastery of Port-Royal-des-Champs where their authors worked.
[1] A core argument of Arnauld and Lancelot's general and rational grammar is that language reveals human thought structures which are based on the logic of predication.
[7] Noam Chomsky considers The Port-Royal Grammar as evidence for his innate concept of language in his 1966 book Cartesian Linguistics, associating the idea to Descartes.
Chomsky's claim became soon disputed by historians of linguistics including Hans Aarsleff, Robin Lakoff, E. F. K. Koerner, and Vivian Salmon.
In other words, Arnauld and Lancelot, and their later interpreters including Husserl, considered semantics and thought as compositional and being built up of logical propositions.