We use the t-node attribute formeme (which is not a genuine element of the semantically oriented t-layer, but rather only a technical means that facilitates modeling the transition between t-trees and surface sentence shapes) to capture syntactization of the given t-node, with values such as n:subj -semantic noun (s.n.)
there are several limitations implied by HMTMs which we have to consider before applying it to MT: (1) There can be only one labeling function on the source-language nodes, and one labeling function on the target-language nodes.