The noun phrase is a syntactic domain revolving around a nominal head. A noun phrase can include the head noun (a noun or pronoun) alone or the head noun accompanied by other elements (nominal modifiers). The head noun can be modified by several elements: determiners (SYNTAX 4.1), possessives (SYNTAX 4.2), numerals (SYNTAX 4.3), quantifiers (SYNTAX 4.4), and adjectives (SYNTAX 4.5). It can also be modified by a clause (see the section on relative clauses, SYNTAX 3.4).