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# Disclaimer: http://www.lockheedmartin.com/disclaimer.html
##
# This file is in N3 format, a language equivalent to XML but easier to
# read and write.  It is best viewed with tab stops at 8 spaces.
# The following are bindings for namespace shorthands.
##

@prefix rdf:<http://www.w3.org/1999/02/22-rdf-syntax-ns#>. 
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>.
@prefix owl: <http://www.w3.org/2002/07/owl#>.
@prefix dc: <http://www.dublincore.org/2003/03/24/dces#>.
@prefix dct: <http://dublincore.org/2003/03/24/dcq#>.
@prefix log: <http://www.w3.org/2000/10/swap/log#>.
@prefix xsd:  <http://www.w3.org/2001/XMLSchema#>.
@prefix oe: <http://www.atl.lmco.com/projects/ontology/ontologies/core/operation/OperationEvaluation.n3#>.
@prefix ao: <http://www.atl.lmco.com/projects/ontology/ontologies/core/alignment/Alignment.n3#>. 
@prefix : <http://www.atl.lmco.com/projects/ontology/ontologies/core/alignment/AlignmentEvaluation.n3#>.

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# This is an ontology for expressing the evaluation metrics for ontology alignment tasks. These
# are "intrinsic" metrics for alignment only.  They do not address the the impact of an 
# alignment on the performance of an application using an alignment.
##

<http://www.atl.lmco.com/projects/ontology/ontologies/core/alignment/AlignmentEvaluation.n3>=<>;
	a log:N3Document;
	a owl:Ontology;
	dc:title "Ontology of Ontology Alignment Evaluation";
	dc:publisher "Lockheed Martin Advanced Technology Laboratories";
	dc:creator "Todd Hughes, thughes@atl.lmco.com";
	dc:creator "Benjamin Ashpole, bashpole@atl.lmco.com";
	dct:created "2003-04-30";
	dct:issued "2004-04-30";
	dct:modified "2004-04-30"; 
	owl:versionInfo "0.0.1";
	dc:format "text/n3";
	dc:language "en";
	rdfs:label "Ontology of Ontology Alignment Evaluation".

:AlignmentEvaluationFile
	rdfs:comment "Alignment Evaluation Files are the standard output for ontology alignment experiments graders. These files contain a set of metrics for evaluating the performance of an aligner in an experiment.";
	a owl:Class;
	rdfs:subClassOf oe:EvaluationFile.

:AlignmentTask
	rdfs:comment "The class of statements with properties that specify input ontologies and true alignment files for the purpose of alignment.";
	a owl:Class.

:alignmentTask
	rdfs:comment "A property relating alignment results to an AlignmentTask (source of ontologies).";
	a rdf:Property;
	rdfs:range :AlignmentTask.

:trueAlignment
	rdfs:comment "A property relating an ontology alignment file with the document containing the 'optimal' alignment solution.";
	a rdf:Property;
	rdfs:subPropertyOf oe:answerKey;
	rdfs:domain ao:AlignmentFile.

#Experiment Metrics

:meanGlobalCardinality
	rdfs:comment "For 1:n mappings between elements between inputA and inputB, this property expresses the average value for n."; 
	a oe:ExperimentMetric;
	rdfs:domain ao:AlignmentFile;
	rdfs:range xsd:decimal.

:sdGlobalCardinality
	rdfs:comment "For 1:n mappings between elements between inputA and inputB, this property expresses the standard deviation value for n."; 
	a oe:ExperimentMetric;
	rdfs:domain ao:AlignmentFile;
	rdfs:range xsd:decimal.

:unalignedElements
	rdfs:comment "The number of elements in inputA for which no corresponding element in inputB has been found.";
	a oe:ExperimentMetric;
	rdfs:domain ao:AlignmentFile;
	rdfs:range xsd:decimal.

:alignmentProportion
	rdfs:comment "The proportion of elements from inputB that were mapped to elements from inputA.";
	a oe:ExperimentMetric;
	rdfs:domain ao:AlignmentFile;
	rdfs:range xsd:decimal.

:uniqueElements
	rdfs:comment "The proportion of resources not shared (i.e, having different URIs) between inputA and inputB.";
	a oe:ExperimentMetric;
	rdfs:domain ao:AlignmentFile;
	rdfs:range xsd:decimal.

:alignmentChallenge
	rdfs:comment "The proportion of unique elements between inputA and inputB to the total number of elements in inputA and inputB.";
	a oe:ExperimentMetric;
	rdfs:domain ao:AlignmentFile;
	rdfs:range xsd:decimal.

#Performance Metrics.  All require use of a "gold standard," i.e., the trueAlignment.

:truePositives
	rdfs:comment "A property relating an ontology alignment file with the number of correct identifications it contains, as determined by the grader.";
	a oe:PerformanceMetric;
	rdfs:domain ao:AlignmentFile;
	rdfs:range xsd:decimal.

:falseNegatives
	rdfs:comment "A property relating an ontology alignment file with the number of correct identifications it misses, as determined by the grader.";
	a oe:PerformanceMetric;
	rdfs:domain ao:AlignmentFile;
	rdfs:range xsd:decimal.

:falsePositives
	rdfs:comment "A property relating an ontology alignment file with the number of incorrect identifications it contains, as determined by the grader.";
	a oe:PerformanceMetric;
	rdfs:domain ao:AlignmentFile;
	rdfs:range xsd:decimal.

:precision
	rdfs:comment "A property relating an ontology alignment file with a numerical value indicating its alignment precision, calculated: truePositives / (truePositives + falsePositives).";
	a oe:PerformanceMetric;
	rdfs:domain ao:AlignmentFile;
	rdfs:range xsd:decimal.

:recall
	rdfs:comment "A property relating an ontology alignment file with a numerical value indicating its alignment recall, calculated: truePositives / (truePositives + falseNegatives).";
	a oe:PerformanceMetric;
	rdfs:domain ao:AlignmentFile;
	rdfs:range xsd:decimal.

:fMeasure
	rdfs:comment "A property relating an ontology alignment file with a numerical value indicating its alignment fMeasure, calculated: 2*(precision*recall)/(precision + recall).";
	a oe:PerformanceMetric;
	rdfs:domain ao:AlignmentFile;
	rdfs:range xsd:decimal.

:alignmentPerformance
	rdfs:comment "A property relating an ontology alignment file with a numerical value indicating its alignment performance given the proportion of overlapping resources between inputA and inputB, calculated: resourceChallenge * fMeasure.";
	a oe:PerformanceMetric;
	rdfs:domain ao:AlignmentFile;
	rdfs:range xsd:decimal.