We describe a new framework for dependency grammar, with a modular decomposition of immediate dependency and linear precedence. Our approach distinguishes two orthogonal yet mutually constraining structures: a syntactic dependency tree and a topological dependency tree. The syntax tree is nonprojective and even non-ordered, while the topological tree is projective and partially ordered.
['Denys Duchier', 'Ralph Debusmann']
Topological Dependency Trees: A Constraint-Based Account of Linear Precedence