Abstract
We investigate how core arguments are coded in case-marking Indo-European languages. Core arguments are a central concept in Universal Dependencies, yet it is sometimes difficult to match against terminologies traditionally used for individual languages.
We review the methodology described in Andrews (2007), and include brief definitions of some basic terms. Statistics from 26 UD treebanks show that not all treebank providers define the core-oblique boundary the same way.
Therefore we propose some refinement and particularization of the guidelines that would improve cross-treebank consistency on the one hand, and be more sensitive to the traditional grammar on the other.