; German Transfer Rule Example

the green tree
der gruene Baum

NP::NP : [DET ADJ N] -> [DET ADJ N]
(
; X-Y Alignment
(X1::Y1)
(X2::Y2)
(X3::Y3)
; X-side constraints
((X1 NUMBER) = (X3 NUMBER))
; Y-side constraints
((Y1 NUMBER) = (Y3 NUMBER))
((Y2 NUMBER) = (Y3 NUMBER))
((Y1 GENDER) = (Y3 GENDER))
((Y2 GENDER) = (Y3 GENDER))
((Y1 CASE) = (Y3 CASE))
((Y2 CASE) = (Y3 CASE))
; X-Y constraints
((X0 NUMBER) = (Y0 NUMBER))
((X0 DEF) = (Y0 DEF))
)