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StructQryDocRep Class Reference

#include <StructQryDocRep.hpp>

Inheritance diagram for StructQryDocRep:

List of all members.

Public Methods
	StructQryDocRep (int docID, double *idfValue, int docLength, int docCount, double docLengthAverage, double db)
	New StructQryDocRep.
virtual	~StructQryDocRep ()
	no clean up
virtual double	termWeight (int termID, DocInfo *info)
	needed for DocRep interface.
virtual double	termWeight (int termID, double dtf, int df)
	Belief score for this term with this dtf.
virtual double	scoreConstant ()
	needed for DocRep interface.
void	startPassageIteration (int sz)
	pass in passage size.
bool	hasMorePassage ()
	any passages left?
void	nextPassage ()
	next block of psgSize termids, empty positions == OOV (0);
double	computeIdfScore (double df)
double	beliefScore (double df, double idf)
	compute the belief score for a given tf/idf.
Public Attributes
int	did
	the document id.
int	start
	start position of a passage
int	end
	end position of a passage
Private Attributes
double *	idf
	cached term idf values. May be NULL.
int	size
	size used by passages
int	increment
	passage overlap value. default is size/2.
int	docEnd
	length of the document.
double	dla
	average document length
double	numer
	terms in idf formula
double	denom
	terms in idf formula
double	defaultBelief
	default belief and 1 - dB.
double	oneMinusDB
	default belief and 1 - dB.

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Detailed Description

Representation of a document for structured query retrieval method. Provides support for passage level operations on a document.

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Constructor & Destructor Documentation

StructQryDocRep::StructQryDocRep (  int    docID, double *    idfValue, int    docLength, int    docCount, double    docLengthAverage, double    db )  [inline]

New StructQryDocRep.

virtual StructQryDocRep::~StructQryDocRep (    )  [inline, virtual]

no clean up

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Member Function Documentation

double StructQryDocRep::beliefScore (  double    df, double    idf )  [inline]

compute the belief score for a given tf/idf.

double StructQryDocRep::computeIdfScore (  double    df )  [inline]

compute idf for the given document frequency as log((|C|+0.5)/df)/(log(|C|+1)

bool StructQryDocRep::hasMorePassage (    )  [inline]

any passages left?

void StructQryDocRep::nextPassage (    )  [inline]

next block of psgSize termids, empty positions == OOV (0);

virtual double StructQryDocRep::scoreConstant (    )  [inline, virtual]

needed for DocRep interface. Implements DocumentRep.

void StructQryDocRep::startPassageIteration (  int    sz )  [inline]

pass in passage size.

virtual double StructQryDocRep::termWeight (  int    termID, double    dtf, int    df )  [inline, virtual]

Belief score for this term with this dtf.

virtual double StructQryDocRep::termWeight (  int    termID, DocInfo *    info )  [inline, virtual]

needed for DocRep interface. Implements DocumentRep.

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Member Data Documentation

double StructQryDocRep::defaultBelief [private]

default belief and 1 - dB.

double StructQryDocRep::denom [private]

terms in idf formula

int StructQryDocRep::did

the document id.

double StructQryDocRep::dla [private]

average document length

int StructQryDocRep::docEnd [private]

length of the document.

int StructQryDocRep::end

end position of a passage

double* StructQryDocRep::idf [private]

cached term idf values. May be NULL.

int StructQryDocRep::increment [private]

passage overlap value. default is size/2.

double StructQryDocRep::numer [private]

terms in idf formula

double StructQryDocRep::oneMinusDB [private]

default belief and 1 - dB.

int StructQryDocRep::size [private]

size used by passages

int StructQryDocRep::start

start position of a passage

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The documentation for this class was generated from the following file:

• StructQryDocRep.hpp

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