Dependency Tree
labels - lexical meanings (abstract symbols) with indices
- functors
- subscripts at parentheses oriented towards head
- grammatemes - values of morphological categories
- Tense, Modality, Number, Definiteness, etc.
valency
- arguments (inner participants) and adjuncts (circumstantials or 'free modifications')
- obligatory and optional with a given head,
- deletable or not