Tgrep2 syntax
lA < B A is the parent of (immediately dominates) B.
lA > B A is the child of B.
lA <N B B is the Nth child of A (the rst child is <1).
lA >N B A is the Nth child of B (the rst child is >1).
lA <, B Synonymous with A <1 B.
lA >, B Synonymous with A >1 B.
lA <-N B B is the Nth-to-last child of A (the last child is
<-1).
lA >-N B A is the Nth-to-last child of B (the last child is
>-1).
lA <- B B is the last child of A (synonymous with A <-1 B).
lA >- B A is the last child of B (synonymous with A >-1 B).
lA <` B B is the last child of A (also synonymous with A <-1
B).
lA >` B A is the last child of B (also synonymous with A >-1
B).
lA <: B B is the only child of A
lA >: B A is the only child of B
lA << B A dominates B (A is an ancestor of B).