An island grammar is a grammar that only describes a small chunk of the underlying language. It is used in language parsing in situations where there is no requirement for checking the entire syntax of a provided text. Island grammars can be extended with the use of a bridge grammar.
Small chunks of underlying language are called island grammar.
( z1 call :ARG1 ( z2 chunk :mod ( z3 small ) :part-of ( z4 language :ARG0-of ( z5 underlie ) ) ) :ARG2 ( z6 grammar :mod ( z7 island ) ) )