Package edu.stanford.nlp.time

Interface TimeExpressionExtractor

All Known Implementing Classes:

TimeExpressionExtractorImpl

public interface TimeExpressionExtractor

A TimeExpressionExtractor extracts a list of time expressions from a document annotation.

Author:

Angel Chang

Method Summary

Modifier and Type	Method	Description
List<CoreMap>	extractTimeExpressionCoreMaps(CoreMap annotation, CoreMap docAnnotation)	Extract time expressions from a sentence in a document.
List<CoreMap>	extractTimeExpressionCoreMaps(CoreMap annotation, String docDate)	Extract time expressions in a document (provided as a CoreMap Annotation).
void	finalize(CoreMap docAnnotation)	Indicates that all annotations on the document has been completed Performs cleanup on the document annotation.
void	init(Options options)
void	init(String name, Properties props)

Method Detail

init

void init(String name,
          Properties props)

init

void init(Options options)

extractTimeExpressionCoreMaps

List<CoreMap> extractTimeExpressionCoreMaps(CoreMap annotation,
                                            CoreMap docAnnotation)

Extract time expressions from a sentence in a document. The document is assumed to contain the document date. The document is also used to hold stateful information (e.g. the index used by SUTime to generate timex ids). Both the sentence and document are provided as a CoreMap Annotation.

Parameters:

annotation - - Annotation holding tokenized text from which the time expressions are to be extracted

docAnnotation - - Annotation for the entire document Uses the following annotations: CoreAnnotations.DocDateAnnotation.class (String representing document date) TimeExpression.TimeIndexAnnotation.class (Holds index used to generate tids)

Returns:

List of CoreMaps

extractTimeExpressionCoreMaps

List<CoreMap> extractTimeExpressionCoreMaps(CoreMap annotation,
                                            String docDate)

Extract time expressions in a document (provided as a CoreMap Annotation).

Parameters:

annotation - The annotation to run time expression extraction over

docDate - A date for the document to be used as a reference time.

Returns:

A list of CoreMap. Each CoreMap represents a detected temporal expression. Each CoreMap is a pipeline.Annotation, and you can get various attributes of the temporal expression out of it. For example, you can get the list of tokens with:

     
     List<CoreMap> cm = extractTimeExpressionCoreMaps(annotation, docDate);
     List<CoreLabel> tokens = cm.get(CoreAnnotations.TokensAnnotation.class); 
     

finalize

void finalize(CoreMap docAnnotation)

Indicates that all annotations on the document has been completed Performs cleanup on the document annotation.

Parameters:

docAnnotation - A document annotation.