lemur::retrieval Namespace Reference

document retrieval components. More...

Classes
class	AbsoluteDiscountDocModel
	Absolute discout smoothing. More...
class	AndQnode
	Implements the AND query operator. Evaluates to the product of the max of the default score and the score of each of its child nodes. More...
class	ArrayAccumulator
	Array Score Accumulator. More...
class	ArrayQueryRep
	Representation of a query with a double array. More...
class	BandNotQnode
	Implements the BANDNOT query operator. This is the Boolean AND NOT operator. Evaluates to the score of its first child node if the score of its second child is less than or equal to the default score, otherwise 0. More...
class	BandQnode
	Implements the BAND query operator. This is the Boolean AND operator. Evaluates to the product of the scores of its child nodes if all of their scores exceed the default score, otherwise 0. More...
class	BeliefNode
	Parent class for all belief operators. More...
class	CORIDocRep
class	CORIQueryRep
class	CORIRetMethod
class	CORIScoreFunc
class	CosSimDocRep
	Representation of a doc (as a weighted vector) in the CosSim method. More...
class	CosSimQueryRep
	Representation of a query (as a weighted vector) in the CosSim method. More...
class	CosSimRetMethod
	Cosine similarity retrieval method. More...
class	CosSimScoreFunc
	The ScoreFunction for the CosSim method. More...
class	DirichletPriorDocModel
	Bayesian smoothing with Dirichlet prior. More...
class	FiltRejQnode
	Implements the FILREJ query operator. This is the FILTER REJECT operator. Evaluates to the score of its first child node if the score of its second child is less than or equal to the default score, otherwise the default score. More...
class	FiltReqQnode
	Implements the FILREQ query operator. This is the FILTER REQUIRE operator. Evaluates to the score of its first child node if the scores of both children are greater than the default score, otherwise the default score. More...
class	IndriQueryModel
	Query model representation for the indri query language. More...
class	IndriRetMethod
	Indri structured query language retrieval method. More...
class	InQueryRep
	Representation of a query in the InQuery method. More...
class	InQueryRetMethod
	The InQuery retrieval method for structured queries. More...
class	JelinekMercerDocModel
	Jelinek-Mercer interpolation. More...
class	MaxQnode
	Implements the MAX query operator. Evaluates to the maximum of the scores of its child nodes and the default score. More...
class	NotQnode
	Implements the NOT query operator. Evaluates to the 1 - the score of its child node. More...
class	OdnQNode
	Implements the ODN operator. This is the ORDERED WINDOW operator. Evaluates to the proximityScore of the document. More...
class	OkapiDocRep
	Doc representation for Okapi model. More...
class	OkapiQueryRep
	OkapiQueryRep carries an array to store the count of relevant docs with a term. More...
class	OkapiQueryTerm
	Represent of a query term in Okapi retrieval model, the term carries a count of the number of rel docs with the term. More...
class	OkapiRetMethod
	The Okapi BM25 retrieval function, as described in their TREC-3 paper. More...
class	OkapiScoreFunc
	The Okapi scoring function. More...
class	OrQnode
	Implements the OR query operator. Evaluates to the 1 - the product of (1 - score) for each of its child nodes whose score is greater than the default score. More...
class	PassageQNode
	Implements the PASSAGEN operator. More...
class	PassageRep
	Passage representation for a document. More...
class	PassageRep::iterator
	Replace with STL style iterator. iterator over passages. More...
struct	PassageScore
	Score of a passage, with start and end indices. More...
class	PassageScoreVector
	Vector of passage scores, supports sorting. More...
class	PassageScoreVector::PassageScoreDescending
class	PropQNode
	Implements the PROP operator. This implementation uses #0 to model #prop(field proxnode). Implementation and inheritance may change. More...
class	ProxInfo
	Proximity information for a term within a document. More...
class	ProxNode
	Parent class for all prox operators. More...
class	QnList
	List of query nodes which constitute the one level of a structured query parse tree. More...
class	QueryNode
	Base class for all structured query operators. More...
class	SimpleKLDocModel
	Doc representation for simple KL divergence retrieval model. More...
class	SimpleKLQueryModel
	Query model representation for the simple KL divergence model. More...
class	SimpleKLRetMethod
	KL Divergence retrieval model with simple document model smoothing. More...
class	SimpleKLScoreFunc
	Simple KL-divergence scoring function. More...
class	StructQryDocRep
	Representation of a document for structured query retrieval method. Provides support for passage level operations on a document. More...
class	StructQueryRep
	Structured query representation. More...
class	SumQnode
	Implements the SUM query operator. Evaluates to the average of the scores of its child nodes. More...
class	SynQNode
	Implements the SYN operator. Evaluates to the proximityScore for the conflated child terms within the document. More...
class	TermQnode
	Implements a term query node (leaf). More...
class	TFIDFDocRep
	Representation of a doc (as a weighted vector) in the TFIDF method. More...
class	TFIDFQueryRep
	Representation of a query (as a weighted vector) in the TFIDF method. More...
class	TFIDFRetMethod
	The TFIDF retrieval method with a few TF formula options. More...
class	TwoStageDocModel
	Two stage smoothing : JM + DirichletPrior. More...
class	UwnQNode
	Implements the UWN operator. This is the UNORDERED WINDOW operator. Evaluates to the proximityScore of the document. More...
class	WsumQnode
	Implements the WSUM query operator. Evaluates to the average of the weighted scores of its child nodes. More...
class	XLingDocModel
	Doc representation for cross lingual retrieval model. More...
class	XLingQueryModel
	Query model representation for the cross lingual retrieval model. More...
class	XLingRetMethod
	Cross lingual retrieval method. More...
class	XLQueryTerm
	Query term for cross-lingual retrieval queries. More...

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Detailed Description

document retrieval components.

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