No Null Nouns - corpora@parles.upf

C-structure and f-structure
An alternative that assumes syntactic information is
factored into a categorial structure (c-structure) and
a feature structure (f-structure) as parallel, copresent
levels of representation.
A string is grammatical if it satisfies the wellformedness
conditions on both structures.
Let’s start with the c-structure: a syntactic tree of the
usual sort, satisfying
Lexicalism: every X 0 dominates a fully formed word—a
unit satisying morphological integrity and consisting
at least of a phonological representation—of
category X.