abstract = "It is well known that using high-locality
representations is important for efficient evolutionary
search. This paper investigates the locality of the
genotype-phenotype mapping (representation) used in
grammatical evolution (GE). The results show that the
representation used in GE has problems with locality as
many neighbouring genotypes do not correspond to
neighboring phenotypes. Experiments with a simple local
search strategy reveal that the GE representation leads
to lower performance for mutation based search
approaches in comparison to standard GP
representations. The results suggest that locality
issues should be considered for further development of
the representation used in GE.",