  Universal Dependencies is an open community effort to create
cross-linguistically consistent treebank annotation for many languages within a
dependency-based lexicalist framework. The annotation consists in a
linguistically motivated word segmentation; a morphological layer comprising
lemmas, universal part-of-speech tags, and standardized morphological features;
and a syntactic layer focusing on syntactic relations between predicates,
arguments and modifiers. In this paper, we describe version 2 of the guidelines
(UD v2), discuss the major changes from UD v1 to UD v2, and give an overview of
the currently available treebanks for 90 languages.
