Interface IDFRSimilarity

Implements the divergence from randomness (DFR) framework introduced in Gianni Amati and Cornelis Joost Van Rijsbergen. 2002. Probabilistic models of information retrieval based on measuring the divergence from randomness. ACM Trans. Inf. Syst. 20, 4 (October 2002), 357-389. The DFR scoring formula is composed of three separate components: the basic model, the aftereffect and an additional normalization component, represented by the classes BasicModel, AfterEffect and Normalization, respectively.The names of these classes were chosen to match the names of their counterparts in the Terrier IR engine.

Inherited Members
Namespace: OpenSearch.Client
Assembly: OpenSearch.Client.dll
Syntax
public interface IDFRSimilarity : ISimilarity

Properties

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AfterEffect

The after effect

Declaration
[DataMember(Name = "after_effect")]
DFRAfterEffect? AfterEffect { get; set; }
Property Value
Type Description
DFRAfterEffect?
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BasicModel

The basic model

Declaration
[DataMember(Name = "basic_model")]
DFRBasicModel? BasicModel { get; set; }
Property Value
Type Description
DFRBasicModel?
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Normalization

The normalization

Declaration
[DataMember(Name = "normalization")]
Normalization? Normalization { get; set; }
Property Value
Type Description
Normalization?
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NormalizationH1C

Normalization model that assumes a uniform distribution of the term frequency.

Declaration
[DataMember(Name = "normalization.h1.c")]
double? NormalizationH1C { get; set; }
Property Value
Type Description
double?
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NormalizationH2C

Normalization model in which the term frequency is inversely related to the length.

Declaration
[DataMember(Name = "normalization.h2.c")]
double? NormalizationH2C { get; set; }
Property Value
Type Description
double?
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NormalizationH3C

Dirichlet Priors normalization

Declaration
[DataMember(Name = "normalization.h3.c")]
double? NormalizationH3C { get; set; }
Property Value
Type Description
double?
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NormalizationZZ

Pareto-Zipf Normalization

Declaration
[DataMember(Name = "normalization.z.z")]
double? NormalizationZZ { get; set; }
Property Value
Type Description
double?

Extension Methods