C# Class mergedServices.Lexicon

Lexicon Class which is used to act as a Triple store contains Literals and Predicates that match words in the Question it has two main functions Getpredicates , GetLiterals which returns the matching literals and predicates objects

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Public Methods

Method	Description
GetStemmedWords ( string question ) : List>.Dictionary	Get all possible stems for each word in the string
Lexicon ( ) : System	constructor of the Lexicon class
getLiterals ( string question, int topN = 30, int Limit = 30 ) : List	get predicates is a method in lexicon class that get all LexiconLiterals objects that match some words in the Question
getPermutations ( string questionLeft ) : List	This function returns all permutations of a string ex: father of barack obama 1st iteration: father, of, barack, obama 2nd iteration: father of, of barack, barack obama 3rd iteration: father of barack, of barack obama 4th iteration: father of barack obama
getPredicates ( string question, int topN = 20, int Limit = 30 ) : List	get predicates is a method in lexicon class that get all predicates objects that match some words in the Question

Private Methods

Method	Description
addDomainAndRange ( List predicateList ) : List	takes the list of Predicates and add tothem the domain and Range data needed in two steps 1st : searching for direct Domain and ranges 2nd : searching for predicates who don't have domain and ranges and select the all predicates and objects get their types and add them to the domain and range field
scoreLiterals ( List results, int n ) : List
scorePredicates ( List results, int n ) : List	scoring predicates calculating the Distance between them and the matching words then returning the n ones who have the least distance
trimPermutations ( List m ) : List	after getting all permutations this function is to remove permutations that may take time during the Query and return no results

Method Details

GetStemmedWords() public method

Get all possible stems for each word in the string

public GetStemmedWords ( string question ) : List>.Dictionary
question	string	String (question) to find its words stems
return	List>.Dictionary

Lexicon() public method

constructor of the Lexicon class

public Lexicon ( ) : System
return	System

getLiterals() public method

get predicates is a method in lexicon class that get all LexiconLiterals objects that match some words in the Question

public getLiterals ( string question, int topN = 30, int Limit = 30 ) : List
question	string	question to get matched predicates of it
topN	int	the number of top matching results to be returned, default = 10
Limit	int	the limit of the number of returned results in the query, default = 20
return	List

getPermutations() public method

This function returns all permutations of a string ex: father of barack obama 1st iteration: father, of, barack, obama 2nd iteration: father of, of barack, barack obama 3rd iteration: father of barack, of barack obama 4th iteration: father of barack obama

public getPermutations ( string questionLeft ) : List
questionLeft	string	The certain string to enter
return	List

getPredicates() public method

get predicates is a method in lexicon class that get all predicates objects that match some words in the Question

public getPredicates ( string question, int topN = 20, int Limit = 30 ) : List
question	string	question to get matched predicates of it
topN	int	the number of top matching results to be returned, default = 10
Limit	int	the limit of the number of returned results in the query, default = 20
return	List