Paratactic syntactic structures are notoriously difficult to represent in dependency formalisms, which has painful consequences such as high frequency of parsing errors related to coordination. In other words, coordination is a pending problem in dependency analysis of natural languages.
This paper tries to shed some light on this area by bringing a systematizing view of various formal means developed for encoding coordination structures. We introduce a novel taxonomy of such approaches and apply it on treebanks across a typologically diverse range of 26 languages.
Empirical observations on convertibility between selected styles of representations are shown too.