Uses of Interface
org.dllearner.core.Component

Packages that use Component

Package	Description
org.dllearner.accuracymethods
org.dllearner.algorithms
org.dllearner.algorithms.celoe
org.dllearner.algorithms.decisiontrees.dsttdt
org.dllearner.algorithms.decisiontrees.refinementoperators
org.dllearner.algorithms.decisiontrees.tdt
org.dllearner.algorithms.el	Learning algorithms for the EL description logic.
org.dllearner.algorithms.isle
org.dllearner.algorithms.isle.metrics
org.dllearner.algorithms.meta
org.dllearner.algorithms.ocel	New experimental refinement operator approach, which takes obtained information about concrete examples in an algorithm run stronger into account.
org.dllearner.algorithms.pattern
org.dllearner.algorithms.probabilistic.parameter.distributed.unife.edge
org.dllearner.algorithms.probabilistic.parameter.unife.edge
org.dllearner.algorithms.probabilistic.structure.distributed.unife.leap
org.dllearner.algorithms.probabilistic.structure.unife.leap
org.dllearner.algorithms.properties
org.dllearner.algorithms.qtl	Learning algorithm based on so-called query trees which are a tree based representation of a (set of) RDF resource(s)
org.dllearner.algorithms.qtl.heuristics
org.dllearner.algorithms.semkernel
org.dllearner.configuration.spring.editors
org.dllearner.confparser
org.dllearner.confparser.json
org.dllearner.core	Core structure of DL-Learner including the definition of component types and a component manager.
org.dllearner.core.probabilistic.distributed.unife
org.dllearner.core.probabilistic.unife
org.dllearner.core.ref
org.dllearner.kb	DL-Learner knowledge sources, which can be used as background knowledge in learning problems.
org.dllearner.kb.sparql	Runnable scripts, each for a different task or experiment.
org.dllearner.kb.sparql.simple
org.dllearner.learningproblems	Supported DL-Learner learning problems.
org.dllearner.reasoning	Implements the connection to other reasoner or own reasoning/caching algorithms.
org.dllearner.refinementoperators	Refinement operator implementations.
org.dllearner.utilities	Utility classes.
org.dllearner.utilities.owl	OWL utility classes (file manipulation, converting between different formats, orderings on OWL structures etc.).
org.dllearner.utilities.semkernel
org.dllearner.utilities.split

Uses of Component in org.dllearner.accuracymethods

Subinterfaces of Component in org.dllearner.accuracymethods

Modifier and Type	Interface and Description
interface	AccMethod Interface for any accuracy method
interface	AccMethodApproximate Implementation of approximate accuracy calculation.
interface	AccMethodThreeValued Implementations of generalised measures according to method in A Note on the Evaluation of Inductive Concept Classification Procedures
interface	AccMethodThreeValuedApproximate Approximation support for @AccMethodThreeValued
interface	AccMethodTwoValued Accuracy calculation with true/false positive/negative
interface	AccMethodTwoValuedApproximate Approximation support for @AccMethodTwoValued

Classes in org.dllearner.accuracymethods that implement Component

Modifier and Type	Class and Description
class	AccMethodAMeasure
class	AccMethodAMeasureApprox
class	AccMethodFMeasure
class	AccMethodFMeasureApprox
class	AccMethodFMeasureWeighted
class	AccMethodGenFMeasure
class	AccMethodJaccard
class	AccMethodPredAcc
class	AccMethodPredAccApprox
class	AccMethodPredAccOCEL
class	AccMethodPredAccWeighted

Uses of Component in org.dllearner.algorithms

Classes in org.dllearner.algorithms that implement Component

Modifier and Type	Class and Description
class	CELOEWrapper A wrapper class for CELOE that allows for returning the result in forms of OWL axioms.
class	DisjointClassesLearner Learns disjoint classes using SPARQL queries.
class	NaiveALLearner Simple example learning algorithm exhaustively creating complex class expressions of the AL description logic.
class	SimpleSubclassLearner Learns subclass-relationships for a given class by using SPARQL queries.

Uses of Component in org.dllearner.algorithms.celoe

Classes in org.dllearner.algorithms.celoe that implement Component

Modifier and Type	Class and Description
class	CELOE The CELOE (Class Expression Learner for Ontology Engineering) algorithm.
class	OEHeuristicRuntime Search algorithm heuristic for the ontology engineering algorithm.
class	PCELOE The PCELOE is an experimental, parallel implementation of the CELOE algorithm.

Uses of Component in org.dllearner.algorithms.decisiontrees.dsttdt

Classes in org.dllearner.algorithms.decisiontrees.dsttdt that implement Component

Modifier and Type	Class and Description
class	DSTTDTClassifier

Uses of Component in org.dllearner.algorithms.decisiontrees.refinementoperators

Subinterfaces of Component in org.dllearner.algorithms.decisiontrees.refinementoperators

Modifier and Type	Interface and Description
interface	InstanceBasedRefinementOperator A reasoning based refinement operator which consider the available instances in the training step for the generation of the candidates

Classes in org.dllearner.algorithms.decisiontrees.refinementoperators that implement Component

Modifier and Type	Class and Description
class	DLTreesRefinementOperator The original refinement Operator proposed for inducing Terminological Decision Trees

Uses of Component in org.dllearner.algorithms.decisiontrees.tdt

Classes in org.dllearner.algorithms.decisiontrees.tdt that implement Component

Modifier and Type	Class and Description
class	AbstractTDTClassifier
class	TDTClassifier

Uses of Component in org.dllearner.algorithms.el

Subinterfaces of Component in org.dllearner.algorithms.el

Modifier and Type	Interface and Description
interface	ELHeuristic Marker interface for heuristics in the EL learning algorithms.

Classes in org.dllearner.algorithms.el that implement Component

Modifier and Type	Class and Description
class	DisjunctiveHeuristic
class	ELLearningAlgorithm A learning algorithm for EL, which is based on an ideal refinement operator.
class	ELLearningAlgorithmDisjunctive A learning algorithm for EL, which will based on an ideal refinement operator.
class	StableHeuristic A stable comparator for search tree nodes.

Uses of Component in org.dllearner.algorithms.isle

Classes in org.dllearner.algorithms.isle that implement Component

Modifier and Type	Class and Description
class	NLPHeuristic TODO: NLP-Heuristiken in Statistik integrieren

Uses of Component in org.dllearner.algorithms.isle.metrics

Classes in org.dllearner.algorithms.isle.metrics that implement Component

Modifier and Type	Class and Description
class	RelevanceWeightedStableHeuristic A stable comparator for search tree nodes.

Uses of Component in org.dllearner.algorithms.meta

Classes in org.dllearner.algorithms.meta that implement Component

Modifier and Type	Class and Description
class	DisjunctiveCELA A meta algorithm that combines the (partial) solutions of multiple calls of the base class learning algorithm LA into a disjunction.

Uses of Component in org.dllearner.algorithms.ocel

Subinterfaces of Component in org.dllearner.algorithms.ocel

Modifier and Type	Interface and Description
interface	ExampleBasedHeuristic Marker interface for heuristics in the refinement operator based learning approach.

Classes in org.dllearner.algorithms.ocel that implement Component

Modifier and Type	Class and Description
class	FlexibleHeuristic This heuristic compares two nodes by computing a score using the number of covered negatives and the horizontal expansion factor of a node as input.
class	LexicographicHeuristic
class	MultiHeuristic This heuristic combines the following criteria to assign a double score value to a node: quality/accuracy of a concept (based on the full training set, not the negative example coverage as the flexible heuristic) horizontal expansion accuracy gain: The heuristic takes into account the accuracy difference between a node and its parent.
class	NodeComparatorStable This comparator is stable, because it only takes covered examples, concept length and the concepts itself (using again a stable comparator) into account, which do not change during the run of the algorithm.
class	OCEL The DL-Learner learning algorithm component for the example based refinement operator approach.

Uses of Component in org.dllearner.algorithms.pattern

Classes in org.dllearner.algorithms.pattern that implement Component

Modifier and Type	Class and Description
class	PatternBasedAxiomLearningAlgorithm

Uses of Component in org.dllearner.algorithms.probabilistic.parameter.distributed.unife.edge

Classes in org.dllearner.algorithms.probabilistic.parameter.distributed.unife.edge that implement Component

Modifier and Type	Class and Description
class	EDGEDistibutedSingleStep
class	EDGEDistributedDynamic

Uses of Component in org.dllearner.algorithms.probabilistic.parameter.unife.edge

Classes in org.dllearner.algorithms.probabilistic.parameter.unife.edge that implement Component

Modifier and Type	Class and Description
class	AbstractEDGE
class	DummyParameterLearner
class	EDGE This class is a wrapper for EDGE algorithm.

Uses of Component in org.dllearner.algorithms.probabilistic.structure.distributed.unife.leap

Classes in org.dllearner.algorithms.probabilistic.structure.distributed.unife.leap that implement Component

Modifier and Type	Class and Description
class	LEAPDistributed

Uses of Component in org.dllearner.algorithms.probabilistic.structure.unife.leap

Classes in org.dllearner.algorithms.probabilistic.structure.unife.leap that implement Component

Modifier and Type	Class and Description
class	AbstractLEAP There could be different version of LEAP (sequential, multi-thread, distributed), so we need an abstract class.
class	LEAP

Uses of Component in org.dllearner.algorithms.properties

Classes in org.dllearner.algorithms.properties that implement Component

Modifier and Type	Class and Description
class	AsymmetricObjectPropertyAxiomLearner
class	DataPropertyAxiomLearner<T extends org.semanticweb.owlapi.model.OWLDataPropertyAxiom> A learning algorithm for data property axioms.
class	DataPropertyDomainAxiomLearner
class	DataPropertyHierarchyAxiomLearner<T extends org.semanticweb.owlapi.model.OWLDataPropertyAxiom> A learning algorithm for data property hierarchy axioms.
class	DataPropertyRangeAxiomLearner
class	DisjointDataPropertyAxiomLearner
class	DisjointObjectPropertyAxiomLearner
class	EquivalentDataPropertyAxiomLearner
class	EquivalentObjectPropertyAxiomLearner
class	FunctionalDataPropertyAxiomLearner
class	FunctionalObjectPropertyAxiomLearner
class	InverseFunctionalObjectPropertyAxiomLearner
class	InverseObjectPropertyAxiomLearner
class	IrreflexiveObjectPropertyAxiomLearner
class	ObjectPropertyAxiomLearner<T extends org.semanticweb.owlapi.model.OWLObjectPropertyAxiom> A learning algorithm for object property axioms.
class	ObjectPropertyCharacteristicsAxiomLearner<T extends org.semanticweb.owlapi.model.OWLObjectPropertyCharacteristicAxiom> A learning algorithm for object property characteristic axioms.
class	ObjectPropertyDomainAxiomLearner
class	ObjectPropertyHierarchyAxiomLearner<T extends org.semanticweb.owlapi.model.OWLObjectPropertyAxiom> A learning algorithm for object property hierarchy axioms.
class	ObjectPropertyRangeAxiomLearner
class	PropertyAxiomLearner<S extends org.semanticweb.owlapi.model.OWLProperty,T extends org.semanticweb.owlapi.model.OWLLogicalAxiom,V extends org.semanticweb.owlapi.model.OWLObject> A learning algorithm for property axioms.
class	ReflexiveObjectPropertyAxiomLearner
class	SubDataPropertyOfAxiomLearner
class	SubObjectPropertyOfAxiomLearner
class	SymmetricObjectPropertyAxiomLearner
class	TransitiveObjectPropertyAxiomLearner

Uses of Component in org.dllearner.algorithms.qtl

Classes in org.dllearner.algorithms.qtl that implement Component

Modifier and Type	Class and Description
class	QTL2Disjunctive
class	QTL2DisjunctiveMultiThreaded A tree-based algorithm ...

Uses of Component in org.dllearner.algorithms.qtl.heuristics

Classes in org.dllearner.algorithms.qtl.heuristics that implement Component

Modifier and Type	Class and Description
class	QueryTreeHeuristic
class	QueryTreeHeuristicComplex
class	QueryTreeHeuristicSimple A simple heuristic based which just takes the accuracy into account.

Uses of Component in org.dllearner.algorithms.semkernel

Classes in org.dllearner.algorithms.semkernel that implement Component

Modifier and Type	Class and Description
class	SemKernel

Uses of Component in org.dllearner.configuration.spring.editors

Methods in org.dllearner.configuration.spring.editors with parameters of type Component

Modifier and Type	Method and Description
static <T> void	ConfigHelper.configure(Component component, String configName, T configValue) Deprecated.
static List<ConfigOption>	ConfigHelper.getConfigOptions(Component component) Returns all config options for the given component.
static Map<Field,Object>	ConfigHelper.getConfigOptionValues(Component component)

Method parameters in org.dllearner.configuration.spring.editors with type arguments of type Component

Modifier and Type	Method and Description
static List<ConfigOption>	ConfigHelper.getConfigOptions(Class<? extends Component> component) Returns all config options for the given component.

Uses of Component in org.dllearner.confparser

Subinterfaces of Component in org.dllearner.confparser

Modifier and Type	Interface and Description
interface	ConfParser

Classes in org.dllearner.confparser that implement Component

Modifier and Type	Class and Description
class	AbstractConfParser Config parser base class
class	ConfParserLegacy

Uses of Component in org.dllearner.confparser.json

Classes in org.dllearner.confparser.json that implement Component

Modifier and Type	Class and Description
class	ConfParserJson Convert Json Config to DL-Learner config

Uses of Component in org.dllearner.core

Subinterfaces of Component in org.dllearner.core

Modifier and Type	Interface and Description
interface	ActiveLearningAlgorithm Active Learning algorithms are those, which can use feedback from an oracle.
interface	AxiomLearningAlgorithm<T extends org.semanticweb.owlapi.model.OWLAxiom>
interface	ClassExpressionLearningAlgorithm Basic interface for algorithms learning OWL/DL class expressions.
interface	FuzzyClassExpressionLearningAlgorithm Basic interface for algorithms learning fuzzy OWL/DL class expressions.
interface	Heuristic<T>
interface	KnowledgeSource Basic interface for all DL-Learner knowledge sources.
interface	LearningAlgorithm Basic interface for all DL-Learner learning algorithms.
interface	LearningProblem Basic interface for all DL-Learner learning problems.
interface	ReasonerComponent Base class of reasoner all components.
interface	SparqlQueryLearningAlgorithm Basic interface for algorithms learning SPARQL queries.
interface	StoppableLearningAlgorithm Interface for algorithms, which can be stopped and checked whether they are running.

Classes in org.dllearner.core that implement Component

Modifier and Type	Class and Description
class	AbstractAxiomLearningAlgorithm<T extends org.semanticweb.owlapi.model.OWLAxiom,S extends org.semanticweb.owlapi.model.OWLObject,E extends org.semanticweb.owlapi.model.OWLEntity>
class	AbstractCELA Abstract superclass of all class expression learning algorithm implementations.
class	AbstractClassExpressionLearningProblem<T extends Score> Base class for all class expression learning problems.
class	AbstractComponent Base class of all components.
class	AbstractHeuristic Search algorithm heuristic for the ontology engineering algorithm.
class	AbstractKnowledgeSource Represents a knowledge source component, e.g.
class	AbstractLearningProblem<T extends Score,V extends org.semanticweb.owlapi.model.OWLObject,W extends EvaluatedHypothesis<V,T>> Base class for all learning problems.
class	AbstractReasonerComponent Abstract component representing a reasoner.

Methods in org.dllearner.core that return types with arguments of type Component

Modifier and Type	Method and Description
Class<? extends Component>	AnnComponentManager.getComponentClass(String componentName) Get the corresponding component class given the long or short name.
Collection<Class<? extends Component>>	AnnComponentManager.getComponents() Returns a list of all available components in this instance of ComponentManager.
org.apache.commons.collections4.BidiMap<Class<? extends Component>,String>	AnnComponentManager.getComponentsNamed() Convenience method, which returns a list of components along with their name.
org.apache.commons.collections4.BidiMap<Class<? extends Component>,String>	AnnComponentManager.getComponentsNamedShort() Convenience method, which returns a list of components along with their name.
Collection<Class<? extends Component>>	AnnComponentManager.getComponentsOfType(Class type) Get registered components which are of the specified type.
static List<Class<? extends Component>>	AnnComponentManager.getCoreComponentTypes(Class<? extends Component> component) Convenience method to retrieve core types of a component.

Methods in org.dllearner.core with parameters of type Component

Modifier and Type	Method and Description
static String	AnnComponentManager.getDescription(Component component) Returns the description of a DL-Learner component.
static String	AnnComponentManager.getName(Component component) Returns the name of a DL-Learner component.
static String	AnnComponentManager.getShortName(Component component) Returns the short name of a DL-Learner component.
static double	AnnComponentManager.getVersion(Component component) Returns the version of a DL-Learner component.

Method parameters in org.dllearner.core with type arguments of type Component

Modifier and Type	Method and Description
static Set<Field>	AnnComponentManager.getConfigOptions(Class<? extends Component> component) Returns the config options of a DL-Learner component.
static List<Class<? extends Component>>	AnnComponentManager.getCoreComponentTypes(Class<? extends Component> component) Convenience method to retrieve core types of a component.
static String	AnnComponentManager.getDescription(Class<? extends Component> component) Returns the name of a DL-Learner component.
static String	AnnComponentManager.getName(Class<? extends Component> component) Returns the name of a DL-Learner component.
static String	AnnComponentManager.getShortName(Class<? extends Component> component) Returns the name of a DL-Learner component.
static double	AnnComponentManager.getVersion(Class<? extends Component> component) Returns the version of a DL-Learner component.

Uses of Component in org.dllearner.core.probabilistic.distributed.unife

Subinterfaces of Component in org.dllearner.core.probabilistic.distributed.unife

Modifier and Type	Interface and Description
interface	DistributedComponent Marker interface for distributed components.

Classes in org.dllearner.core.probabilistic.distributed.unife that implement Component

Modifier and Type	Class and Description
class	AbstractEDGEDistributed

Uses of Component in org.dllearner.core.probabilistic.unife

Subinterfaces of Component in org.dllearner.core.probabilistic.unife

Modifier and Type	Interface and Description
interface	OWLProbabilisticExplanationReasoner This marker interface for those probabilistic reasoner that returns the set of explanations as well.
interface	OWLProbabilisticReasoner
interface	ParameterLearningAlgorithm
interface	ProbabilisticReasoner
interface	ProbabilisticStructureLearning Interface for probabilistic structure learner.
interface	ProbabilisticStructureLearningAlgorithm

Classes in org.dllearner.core.probabilistic.unife that implement Component

Modifier and Type	Class and Description
class	AbstractParameterLearningAlgorithm Abstract component representing a parameter Learner.
class	AbstractProbabilisticReasonerComponent
class	AbstractPSLA
class	BUNDLE

Uses of Component in org.dllearner.core.ref

Classes in org.dllearner.core.ref that implement Component

Modifier and Type	Class and Description
class	ALCLearningAlgorithm
class	RefinementOperatorBasedLearningAlgorithmBase<T>

Uses of Component in org.dllearner.kb

Subinterfaces of Component in org.dllearner.kb

Modifier and Type	Interface and Description
interface	OWLOntologyKnowledgeSource Created by IntelliJ IDEA.

Classes in org.dllearner.kb that implement Component

Modifier and Type	Class and Description
class	KBFile KB files are an internal convenience format used in DL-Learner.
class	LocalModelBasedSparqlEndpointKS
class	OWLAPIOntology This class provides a wrapper around a single OWL Ontology.
class	OWLFile
class	SparqlEndpointKS SPARQL endpoint knowledge source (without fragment extraction), in particular for those algorithms which work directly on an endpoint without requiring an OWL reasoner.

Uses of Component in org.dllearner.kb.sparql

Classes in org.dllearner.kb.sparql that implement Component

Modifier and Type	Class and Description
class	SparqlKnowledgeSource Represents the SPARQL Endpoint Component.

Uses of Component in org.dllearner.kb.sparql.simple

Classes in org.dllearner.kb.sparql.simple that implement Component

Modifier and Type	Class and Description
class	SparqlSimpleExtractor

Uses of Component in org.dllearner.learningproblems

Classes in org.dllearner.learningproblems that implement Component

Modifier and Type	Class and Description
class	ClassAsInstanceLearningProblem A learning problem in which positive and negative examples are classes, i.e.
class	ClassExpressionLearningProblem The problem of learning the OWL class expression for another OWL class expression in an OWL ontology.
class	ClassLearningProblem The problem of learning the OWL class expression of an existing class in an OWL ontology.
class	ExampleLoader Load positive and negative examples from Class Expression
class	FuzzyPosNegLP
class	FuzzyPosNegLPStandard The aim of this learning problem is to learn a concept definition such that the positive examples and the negative examples do not follow.
class	PosNegLP
class	PosNegLPStandard The aim of this learning problem is to learn a concept definition such that the positive examples and the negative examples do not follow.
class	PosNegLPStrict
class	PosNegUndLP A ternary learning problem (positive, negative and uncertain instances) to manage the problem of the Open World Assumption typically employed for ontologies
class	PosOnlyLP A learning problem, where we learn from positive examples only.
class	PropertyAxiomLearningProblem<T extends org.semanticweb.owlapi.model.OWLPropertyAxiom>

Uses of Component in org.dllearner.reasoning

Classes in org.dllearner.reasoning that implement Component

Modifier and Type	Class and Description
class	ClosedWorldReasoner Reasoner for fast instance checks.
class	OWLAPIReasoner Mapping to OWL API reasoner interface.
class	SPARQLReasoner A reasoner implementation that provides inference services by the execution of SPARQL queries on local files (usually in forms of JENA API models) remote SPARQL endpoints
class	SPARQLReasonerQuad Specialised SPARQL Reasoner for specific SPARQL dialects

Uses of Component in org.dllearner.refinementoperators

Subinterfaces of Component in org.dllearner.refinementoperators

Modifier and Type	Interface and Description
interface	CustomHierarchyRefinementOperator A refinement operator for which hierarchies other those of the reasoner can be injected.
interface	CustomStartRefinementOperator A refinement operator, which allows to set a start class.
interface	LengthLimitedRefinementOperator A refinement operator for which the syntactic length of the generated refinements can be limited.
interface	ReasoningBasedRefinementOperator A refinement operator, which uses an underlying reasoner, which is a typical scenario.
interface	RefinementOperator Interface for all refinement operators based on OWL/Description Logics.

Classes in org.dllearner.refinementoperators that implement Component

Modifier and Type	Class and Description
class	AbstractRefinementOperator
class	ELDown EL downward refinement operator constructed by Jens Lehmann and Christoph Haase.
class	OperatorInverter The class uses an existing refinement operator and inverts it, i.e.
class	PsiDown Operatoren Psi-Down und Psi-Up müssen noch so umgeschrieben werden, dass sie nur konsistente Konzepte (mit korrekten parent-Links) enthalten.
class	PsiUp
class	RefinementOperatorAdapter Adapter for RefinementOperator interface.
class	RhoDRDown A downward refinement operator, which makes use of domains and ranges of properties.
class	SynchronizedRefinementOperator A wrapper class that makes the call of the refinement methods synchronized, i.e.

Uses of Component in org.dllearner.utilities

Classes in org.dllearner.utilities that implement Component

Modifier and Type	Class and Description
class	ReasoningUtils Common utilities for using a reasoner in learning problems
class	ReasoningUtilsCLP Extension of ReasoningUtils for ClassLearningProblem

Uses of Component in org.dllearner.utilities.owl

Classes in org.dllearner.utilities.owl that implement Component

Modifier and Type	Class and Description
class	OWLClassExpressionLengthMetric Generic configurable length metric for class expression length calculation

Uses of Component in org.dllearner.utilities.semkernel

Classes in org.dllearner.utilities.semkernel that implement Component

Modifier and Type	Class and Description
class	MPSemKernelWorkflow Since the current setup for running a SemKernel example comprises several steps, like preparing the training data, do the training, preparing the prediction data and so on, this component is intended to encapsulate this whole process and make it callable and configurable via the standard DL-Learner CLI.
class	SemKernelWorkflow Since the current setup for running a SemKernel example comprises several steps, like preparing the training data, do the training, preparing the prediction data and so on, this component is intended to encapsulate this whole process and make it callable and configurable via the standard DL-Learner CLI.

Uses of Component in org.dllearner.utilities.split

Subinterfaces of Component in org.dllearner.utilities.split

Modifier and Type	Interface and Description
interface	ValuesSplitter A values splitter is supposed to return a sorted list of split literals for a data property p, such that those split values can be used in a refinement operator to generate facet restrictions on the value space of p, e.g.

Classes in org.dllearner.utilities.split that implement Component

Modifier and Type	Class and Description
class	AbstractDateTimeValuesSplitter
class	AbstractNumericValuesSplitter
class	AbstractValuesSplitter Abstract class for values splitting implementation.
class	DefaultDateTimeValuesSplitter A splitter for date time values which simply returns a fixed number of split values.
class	DefaultNumericValuesSplitter A splitter for numeric values which simply returns a fixed number of split values.
class	OptimizedNumericValuesSplitter