Language-specific relations
In addition to the universal dependency taxonomy, it is desirable to recognize grammatical relations that are particular to one language or a small group of related languages. Such language-specific relations are necessary to accurately capture the genius of a particular language but will not involve concepts that generalize broadly. These language-specific relations should always be regarded as a subtype of an existing UD relation.
Labels of language-specific relations explictly encode the core UD relation that the language-specific relation is a subtype of, following the format universal:extension.
acl
advmod
advmod:emph
: Ancient Greek, Arabic, Czech, Estonian, Latin, Portuguese, Tamil
auxpass
auxpass:reflex
: Czech, Latin, Portuguese
cc
cc:preconj
: English
ccomp
ccomp:nf
: Finnish
compound
csubj
csubj:cop
: Finnish
det
nmod
nmod:gsubj
: Finnishnmod:gobj
: Finnishnmod:npmod
: Englishnmod:own
: Finnishnmod:poss
: Danish, English, Finnish, French, Spanish, Swedishnmod:loc
: Danishnmod:tmod
: Danish, Englishnmod:agent
: Swedish
nsubj
nsubj:cop
: Finnish