The syntactic annotation in the Arabic UD treebanks follows the general guidelines but adds three language-specific relations:
- nmod:poss for possessive/genitive modifiers
- flat:name for flat relations in proper nouns
- nsubj:pass for nominal subjects of passive verbs
The syntactic annotation has been automatically converted from the original annotation schemes (the PADT for UD Arabic and PATB for UD Arabic LDC).