amie.keys.assistant

Class KeyMinerMiningAssistant

java.lang.Object

amie.mining.assistant.MiningAssistant

amie.mining.assistant.DefaultMiningAssistant

amie.keys.assistant.KeyMinerMiningAssistant

Direct Known Subclasses:

ConditionalKeyMiningAssistant

public class KeyMinerMiningAssistant
extends DefaultMiningAssistant

Implements a subclass of the mining assistant that is optimized to mine keys. It extends the standard head variables mining assistant to mine rules of the form r(x, z1) r(y, z1) .... r'(x, zk) r'(y, zk) => equals(x, y)

Author:

galarrag

Field Summary

Fields inherited from class amie.mining.assistant.DefaultMiningAssistant

hardQueries

Fields inherited from class amie.mining.assistant.MiningAssistant

allowConstants, avoidUnboundTypeAtoms, bodyExcludedRelations, bodyTargetRelations, confidenceMetric, countAlwaysOnSubject, enabledConfidenceUpperBounds, enabledFunctionalityHeuristic, enablePerfectRules, enableQueryRewriting, enforceConstants, exploitMaxLengthOption, headCardinalities, headExcludedRelations, kb, kbSchema, maxDepth, minPcaConfidence, minStdConfidence, recursivityLimit, subPropertyString, totalObjectCount, totalSubjectCount, typeString, verbose

Constructor Summary

Constructors

Constructor and Description
KeyMinerMiningAssistant(KB dataSource)

Method Summary

Modifier and Type	Method and Description
void	getClosingAtoms(Rule query, double minSupportThreshold, java.util.Collection<Rule> output) Returns all candidates obtained by adding a composite closing edge of the form r(x, z), r(y, z) where x, y are the head variables of the rule sent as argument.
void	getDanglingAtoms(Rule query, double minCardinality, java.util.Collection<Rule> output) Returns all candidates obtained by adding a new triple pattern to the query
java.lang.String	getDescription() Brief description of the MiningAssistant capabilities.
void	getInitialAtomsFromSeeds(java.util.Collection<ByteString> seedsRelations, double minSupportThreshold, java.util.Collection<Rule> output) We enforce always an equals relation on the head, no matter if the user provides seeds relations.

Methods inherited from class amie.mining.assistant.DefaultMiningAssistant

calculateConfidenceMetrics, computeBodySize, computeCardinality, computePcaBodySize, computePCAConfidence, computeStandardConfidence, containsHardCase, getDanglingAtoms, getInitialAtoms, getInstantiatedAtoms, getTotalCount, main, rewriteProjectionQuery

Methods inherited from class amie.mining.assistant.MiningAssistant

buildInitialQueries, calculateConfidenceApproximationFor3Atoms, calculateConfidenceApproximationForGeneralCase, calculateConfidenceBoundsAndApproximations, canAddInstantiatedAtoms, findCountingVariable, getBodyExcludedRelations, getBodyTargetRelations, getConfidenceMetric, getFactsCount, getHeadCardinality, getHeadExcludedRelations, getInstantiatedAtoms, getKb, getKbSchema, getMaxDepth, getMinConfidence, getPcaConfidenceThreshold, getRecursivityLimit, getRelationCardinality, getRelationCardinality, getSubClasses, getTotalCount, getTotalObjectCount, getTotalSubjectCount, isAvoidUnboundTypeAtoms, isEnabledConfidenceUpperBounds, isEnabledFunctionalityHeuristic, isEnablePerfectRules, isEnableQueryRewriting, isEnforceConstants, isExploitMaxLengthOption, isVerbose, registerHeadRelation, setAllowConstants, setAvoidUnboundTypeAtoms, setBodyExcludedRelations, setConfidenceMetric, setCountAlwaysOnSubject, setEnabledConfidenceUpperBounds, setEnabledFunctionalityHeuristic, setEnablePerfectRules, setEnableQueryRewriting, setEnforceConstants, setExploitMaxLengthOption, setHeadExcludedRelations, setKbSchema, setMaxDepth, setPcaConfidenceThreshold, setRecursivityLimit, setStdConfidenceThreshold, setTargetBodyRelations, setVerbose, testConfidenceThresholds, testLength

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

KeyMinerMiningAssistant

public KeyMinerMiningAssistant(KB dataSource)

Method Detail

getDescription

public java.lang.String getDescription()

Description copied from class: MiningAssistant

Brief description of the MiningAssistant capabilities.

Overrides:

getDescription in class DefaultMiningAssistant

getInitialAtomsFromSeeds

public void getInitialAtomsFromSeeds(java.util.Collection<ByteString> seedsRelations,
                                     double minSupportThreshold,
                                     java.util.Collection<Rule> output)

We enforce always an equals relation on the head, no matter if the user provides seeds relations.

Overrides:

getInitialAtomsFromSeeds in class DefaultMiningAssistant

minSupportThreshold - Only relations of size bigger or equal than this value will be considered.

output - The results of the method are added directly to this collection.

getDanglingAtoms

public void getDanglingAtoms(Rule query,
                             double minCardinality,
                             java.util.Collection<Rule> output)

Description copied from class: DefaultMiningAssistant

Returns all candidates obtained by adding a new triple pattern to the query

Overrides:

getDanglingAtoms in class DefaultMiningAssistant

getClosingAtoms

public void getClosingAtoms(Rule query,
                            double minSupportThreshold,
                            java.util.Collection<Rule> output)

Returns all candidates obtained by adding a composite closing edge of the form r(x, z), r(y, z) where x, y are the head variables of the rule sent as argument.

Overrides:

getClosingAtoms in class DefaultMiningAssistant

Parameters:

currentNode -

minSupportThreshold -

omittedVariables -