Automa’c Enrichment of Ontology for Engineering Design Process … · 2019. 9. 20. · Challenge...

Automa'cEnrichmentofOntologyforEngineeringDesignProcess

KobkaewOpasjumruskitGermanAerospaceCenter(DLR)Ins=tuteofDataScienceSEMANTiCS2019,September9-12Karlsruhe

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Agenda•  Scenario

•  OntologyforSatelliteDesignProcess–  Structure&CurrentDevelopment

•  Automa=cImprovementofOntology–  ConTrOn–Con=nuouslyTrainedOntology

•  Summary&Outlook

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Introduc=on Ontology ConTrOn Summary

CopyrightESA-ScienceOffice.org

ConcurrentEngineeringFacility

ProductSpecifica=on

ModelBasedSystemEngineeringTool

3UseScenario


Challenge#1HeterogeneousFormats

4UseScenario


Challenge#2Standarddescrip=on

Ø  Notmachine-interpretableØ  Requiremanualefforts

transferringdataintotools

ECSS-E-ST-60-20C–Starsensorterminologyandperformancespecifica=on

5UseScenario


#1ONTOLOGYFORSATELLITEPARTS

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Ontology:Sources•  DatamodelsdevelopedbyDLR'sin-houseMBSEtool

–  hcps://github.com/virtualsatellite

•  Exis=ngproductdescrip=onstandards

•  Actualproductdatasheets

•  Interviewwithsystemengineersandmanufacturers

•  Currentversion:hcps://zenodo.org/record/2616374

7OntologyforProductData


Ontology:HierarchicalStructure

Base

Core

Spacecraft parts ontologies External Ontologies

hcps://schema.org/Organiza=on.cl

hcps://github.com/HajoRijgersberg/OM



SpacecraiPartsOntology:Base•  Primaryclasses

–  Part(Product)–  Part’sacribute–  Typeofacribute

•  Primaryproper=es–  “ispropertyof”–  “hasproperty”–  “hasunit”

Base

Core



SpacecraiPartsOntology:Core•  Commonacributesforallparts

–  Mass–  Life=me–  Opera=ngTemperature–  Width,Height,Length

•  26acributesBase

Core

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SpacecraiPartsOntology:StarTracker•  Specificacributestostartrackers

–  Antudeaccuracy–  Fieldofview–  SNR–  Etc.

•  36Acributes

Base

Core



ProductOntology:FurtherUsages•  Conversiontodatabaseschema

hcps://gitlab.com/dlr-dw/ontocode

•  Partdataexchangeinterface– WebAPI

•  Knowledgegraph–  Informa=onretrieval



However,as=meflies

hcp://spaceflight101.com/meteor-m-2-1

Peoplechange,productschange

AndontologyshouldevolveBut,how…

13Auto-Improvementofontology


#2AUTO-IMPROVEMENTOFONTOLOGY


Informa'onExtrac'on

Ø NaturalLanguageProcessingØ  Seman=cKnowledge



Exis=ngTools:En==esExtrac=on


DBpedia Spotlight

OPEN CALAIS


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Con=nuouslyTrainedOntology


DomainKnowledgeExtractor

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data,power,mm,space,receiver,temperature,mass,thruster,radia=on,noise,bacery,weight,

magne'c_field,reliability,data_rate,payload,telemetry,resolu=on,thermal,baffle,life=me,gauss,

data_rates,propulsion_system,tracker,solar

Ø  ExtractkeywordsØ  Bag-of-wordsØ  Tf-idf

Ø  WordDisambigua=onØ  hcps://wordnet.princeton.edu/Ø  Part-of-SpeechTaggingØ  VectorSpaceModel

Defini=on,Synonyms,Hypernyms,…

Auto-Improvementofontology


OntologyEnricher

Ø  Ifambiguous(mul=pleen==esmatched),comparetodomainknowledgekeywords

Ø  Atthisstep,onlyenrichingtheexis=ngclasses

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Ontology

A battery has an attribute “Operating Temperature”

Opera'ngTemperature(P5066)temperatureatwhichadeviceoperates.Usevaluessuchas"maximum"(Q10578722),"minimum"(Q10585806).

Semantic Knowledge Base

Auto-Improvementofontology


Informa=onExtractor•  Searchtextbasedonontologyclasses

–  Name,label,superclass,sameas•  Extractvaluesthatcomeaierkeywords

•  Needhuman-in-the-loop:Next



Key-ValuePacernLearner•  UsersprovidefeedbackviaaUI

(human-in-the-loop)

•  Key→Addtotheontology–  Enrichbyaddingnewclasses

•  Value→Improvetheinforma=onextrac=on21Auto-Improvementofontology


PacernExample

•  Learnedpacerns–  <number>+"x"+<number>+"x"+<number>+<unit>–  <number><unit>+"x“+<number><unit>+"x“+<number><unit>

•  Verifythepacern

–  Applytotheinforma=onextractor–  Choosethepacernthatyieldtheminimumerror



Summary•  Currentsatellitepartsontologyisavailableat:hcps://zenodo.org/record/

2616374

•  ConTrOn:automa=callyimproveontologyfromdatasheetsü  OntologyEnrichmentü  DomainKnowledgeExtrac=onü  Ontology-basedInforma=onExtrac=onq Key-ValuePacernLearner(human-in-the-loop)

23Summary&Outlook


Outlook

•  Collec=ngfeedbacksfromusers

–  Baselineforevalua=onofinforma=onextrac=on

•  Extensionofontology

•  Knowledgegraphfromdatasheets

24Summary&Outlook


Thankyouforyouracen=on!

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[email protected]

Ontology:Concept

26hcps://www.ontotext.com/knowledgehub/fundamentals/

Seman=cKnowledge

hcps://www.ontotext.com/knowledgehub/fundamentals/


Automa’c Enrichment of Ontology for Engineering Design Process … · 2019. 9. 20. · Challenge...

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