The four types which are relevant in the syntax of noun phrases are np (noun phrase), det (determiner), a (adjective) and n (noun). Each type has the attributes AGR and SEM. Furthermore, det and n have an attribute SC. The np type has three further attributes: CASE, NFORM and PFORM. Finally, a is also specified for MOD.
The features AGR ( agreement), CASE, and NFORM
( noun form) are used to encode agreement properties (encoded as
a boolean combination of person, number, determiner
and definiteness), the case value and the form of an item. Their
possible values are listed in (14). Note that AGR
contains the information needed for subject-verb agreement, as well as
for NP-internal agreement (between determiner, adjective, and
noun). The agreement types de and het (the two forms of
the definite article) distinguish between neuter and nonneuter nouns.
CASE and NFORM are relevant for full NPs only.
Full NPs never take complements, so they do not have a feature SC. Adjectives may modify a noun, therefore the feature MOD is defined for type a.
The two rules we presented in (6) and (7) (section 2.4) are used to form NPs consisting of a determiner and a (possibly complex) noun, and Ns consisting of an adjective followed by a (possibly complex) noun. The derivation of the NP de volgende intercity (the next intercity) is shown in figure 4.