Surface Syntactic Universal Dependencies (SUD)

SUD is an annotation scheme for syntactic dependency treebanks, near isomorphic to UD (Universal Dependencies). Contrary to UD, it is based on syntactic criteria (favoring functional heads) and the relations are defined on distributional and functional bases.


Automatic conversion to the SUD format are available here.


The SUD annotation scheme is described in the publications below:

SUD relations overview

The picture below describes:

The light-blue boxes at the bottom correspond to the deep syntactic features.