The valency of a node is represented in a tectogrammatical tree in the following way:
by assigning the node an adequate
valency frame (from the valency lexicon). The val_frame.rf attribute contains the identifier assigned to the
valency frame corresponding to the given meaning of the given
word.
by filling in the valency frame in the tectogrammatical tree. Filling in the valency frame in a tectogrammatical tree means assigning functors to the dependent valency modifications (according to the assigned valency frame) and generating new nodes for those obligatory modifications that are not present at the surface level of the sentence. The rules for adding new nodes (for obligatory modifications) into a tectogrammatical tree are described mainly in Section 6.1.2, “Ellipsis of a dependent meaning unit”.
The present state of valency representation in PEDT. Not every case of valency requirements is represented properly in the tree structures. Valency is only represented properly with nodes with verb t-lemmas.
At the end of the annotation and after all necessary checks for all checked notes will be guaranteed that:
they are assigned the appropriate valency frame. The value
in the val_frame.rf attribute
is valid (which might not be the case with unchecked
nodes).
their valency frames are filled in, i.e. the dependent modifications are assigned the appropriate functors and new nodes are generated if necessary (i.e. nodes for non-expressed obligatory modifications).