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## edu.stanford.nlp.trees
Class DependencyTreeTransformer

    java.lang.Object
      edu.stanford.nlp.trees.DependencyTreeTransformer

All Implemented Interfaces:
  TreeTransformer

    public class DependencyTreeTransformer

extends Object
implements TreeTransformer

Transforms an English structure parse tree in order to get the dependencies right: -- put a ROOT node -- remove NONE nodes -- retain only NP-TMP and NP-ADV tags (Note [cdm]: A lot of this overlaps other existing functionality in trees. Could aim to unify it.)

Author:
  mcdm

Field Summary
`protected TreebankLanguagePack` | `tlp`

Constructor Summary
`DependencyTreeTransformer()`

Method Summary
`protected String` | `cleanUpLabel(String label)`
`protected static String` | `cleanUpRoot(String label)`
`protected static Tree` | `stripEmptyNode(Tree t)`
`protected void` | `stripTag(Tree t)`
`Tree` | `transformTree(Tree t)` Does whatever one needs to do to a particular tree.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### tlp

    protected final TreebankLanguagePack tlp

Constructor Detail

### DependencyTreeTransformer

    public DependencyTreeTransformer()

Method Detail

### transformTree

    public Tree transformTree(Tree t)

  Description copied from interface: `TreeTransformer`
  Does whatever one needs to do to a particular tree. This routine is passed a whole `Tree`, and could itself work recursively, but the canonical usage is to invoke this method via the `Tree.transform()` method, which will apply the transformer in a bottom-up manner to each local `Tree`, and hence the implementation of `TreeTransformer` should merely examine and change a local (one-level) `Tree`.

  Specified by:
    `transformTree` in interface `TreeTransformer`
  Parameters:
    `t` - A tree. Classes implementing this interface can assume that the tree passed in is not `null`.
  Returns:
    the transformed `Tree`

### cleanUpRoot

    protected static String cleanUpRoot(String label)

### cleanUpLabel

    protected String cleanUpLabel(String label)

### stripTag

    protected void stripTag(Tree t)

### stripEmptyNode

    protected static Tree stripEmptyNode(Tree t)

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Stanford NLP Group