udapi.block.ud.fixroot module

Block ud.FixRoot will ensure that the tree is free of common root-related errors. Simple heuristics are used; it is likely that human inspection would lead to a different solution. Nevertheless, if a quick fix is needed to pass the validation, this block can be helpful.

WARNING: The block currently ignores enhanced dependencies.

class udapi.block.ud.fixroot.FixRoot(zones='all', if_empty_tree='process', **kwargs)

Bases: Block

Fixes the following validation errors: - Only one node must be attached directly to the artificial root node.

=> If the root has multiple children, keep the first one. Attach the other

ones to the first one. Change their deprel to ‘parataxis’.

• The node attached as a child of the artificial root node must have the ‘root’ relation (or its subtype). => If the root child has another deprel, change it to ‘root’.

• The node attached as a child of the artificial root node is the only one allowed to have the ‘root’ relation (or its subtype). => If another node has that deprel, change it to ‘parataxis’.

process_tree(root)

Process a UD tree