HeadRules (Apache OpenNLP Tools 2.1.1 API)

All Known Implementing Classes:

AncoraSpanishHeadRules, HeadRules
```
public interface HeadRules
```
Encoder for head rules associated with parsing.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Parse`	`getHead(Parse[] constituents, String type)`	Retrieves the head `constituent` for the specified constituents of given `type`.
`Set<String>`	`getPunctuationTags()`

- Method Detail
  - getHead
```
Parse getHead(Parse[] constituents,
              String type)
```
    Retrieves the head constituent for the specified constituents of given type.
    
    Parameters:
    
    constituents - The constituents which make up a constituent of the specified type.
    
    type - The type of a constituent which is made up of the constituents.
    
    Returns:
    
    The constituent which represents the head.
  - getPunctuationTags
```
Set<String> getPunctuationTags()
```
    Returns:
    
    Retrieves the set of punctuation tags. Attachment decisions for these tags will not be modeled.