For a class of compounds described as exocentric, see bahuvrihi. Below are a few examples of the exocentric compounds in Chinese. In theoretical linguistics, a distinction is made between endocentric and exocentric constructions. Exocentric compounds occur more often in adjectives than nouns. The first two trees present the traditional exocentric analysis. The classic instance of an exocentric construction is the sentence (in a phrase structure grammar). Both endocentric and exocentric compounds have been described for a variety of sign languages. Wild colors, materials, and textures are used to create exocentric flies for exhibitions and shows. A phrase lacking a head is known as exocentric, and phrases with heads are endocentric. A bahuvrihi is exocentric, so that the compound is not a hyponym of its head.