ctakes chunker

ctakes-chunker

In cTAKES when we refer to a "chunker" we often mean a shallow parser, i.e. a component that tags noun phrases, verb phrases, etc.
This project provides a Apache UIMA wrapper around the popular Apache OpenNLP chunker.

Annotation Engines
Utilities
Piper Files

---

Annotation Engines

Chunker

Annotator that generates chunks of any kind as specified by the chunker model and the chunk creator.

Source class: Chunker
Source package: org.apache.ctakes.chunker.ae
Parent class: org.apache.uima.fit.component.JCasAnnotator_ImplBase
Dependencies: Sentence, Base Token
Products: Chunk

Parameter	Description	Class	Required	Default
ChunkCreatorClass	The class that will create the chunks	String	No	org.apache.ctakes.chunker.ae. DefaultChunkCreator
ChunkerModelFile	Model file for OpenNLP chunker	String	No	org/apache/ctakes/chunker/models/ chunker-model.zip

Thread safe Chunker

Annotator that generates chunks of any kind as specified by the chunker model and the chunk creator.

Source class: ThreadSafeChunker
Source package: org.apache.ctakes.chunker.concurrent
Parent class: org.apache.ctakes.chunker.ae.Chunker
Dependencies: Sentence, Base Token
Products: Chunk

Parameter	Description	Class	Required	Default
ChunkCreatorClass	The class that will create the chunks	String	No	org.apache.ctakes.chunker.ae. DefaultChunkCreator
ChunkerModelFile	Model file for OpenNLP chunker	String	No	org/apache/ctakes/chunker/models/ chunker-model.zip

---

Utilities

Chunk Adjuster

Annotator that uses a pattern and a rule about that pattern to adjust certain annotations.

Source class: ChunkAdjuster
Source package: org.apache.ctakes.chunker.ae.adjuster
Parent class: org.apache.uima.fit.component.JCasAnnotator_ImplBase
Dependencies: Sentence, Chunk

Parameter	Description	Class	Required	Default
ChunkPattern	The pattern of chunks that trigger an adjustment	String[]	Yes
IndexOfTokenToInclude	The index of the token in the pattern to extend to the end offset	int	Yes

---

Piper Files

Chunker Sub Pipe

Commands and parameters to create a default chunker processing sub-pipeline.

Chunker Sub Pipe

$\textcolor{gray}{\textsf{// Commands and parameters to create a default chunker processing sub-pipeline. }}$
$\textcolor{gray}{\textsf{// This is not a full pipeline. }}$

$\textcolor{green}{\textsf{add}}$ Chunker
$\textcolor{green}{\textsf{addDescription}}$ $\textcolor{blue}{\textsf{adjuster.ChunkAdjuster}}$ NP,NP 1
$\textcolor{green}{\textsf{addDescription}}$ $\textcolor{blue}{\textsf{adjuster.ChunkAdjuster}}$ NP,PP,NP 2

Ts Chunker Sub Pipe

Commands and parameters to create a thread-safe default chunker processing sub-pipeline.

Ts Chunker Sub Pipe

$\textcolor{gray}{\textsf{// Commands and parameters to create a thread-safe default chunker processing sub-pipeline. }}$
$\textcolor{gray}{\textsf{// This is not a full pipeline. }}$

$\textcolor{green}{\textsf{add}}$ $\textcolor{blue}{\textsf{concurrent.ThreadSafeChunker}}$
$\textcolor{green}{\textsf{addDescription}}$ $\textcolor{blue}{\textsf{adjuster.ChunkAdjuster}}$ NP,NP 1
$\textcolor{green}{\textsf{addDescription}}$ $\textcolor{blue}{\textsf{adjuster.ChunkAdjuster}}$ NP,PP,NP 2