title: New perspectives on duality of patterning: Introduction to the special issue.
authors.affiliation: Artificial Intelligence laboratory, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium.
authors.forename: Bart
authors.initials: B
authors.lastname: de Boer
authors.affiliation: University of Haifa.
authors.forename: Wendy
authors.initials: W
authors.lastname: Sandler
authors.affiliation: Edinburgh University.
authors.forename: Simon
authors.initials: S
authors.lastname: Kirby
keywords: combinatorial structure; compositional structure; duality of patterning; language evolution