kwm clarke loh lod 20161115 - green chameleon · © 2016 synaptica, llc what is linked data agenda...

Linked Data

Dave ClarkeSynaptica CEO

Gene LohSynaptica Software Architect

The World is Your Database

WhatisLinkedData

Agenda

1. WhatisLinkedData,andwhyisitgoodforyou(15mins)

2. Howitworks(techtalk)(15mins)

3. Howyoucangetstarted(5mins)

4. DiscussionandQ&A(5-10mins)

WhatisLinkedData

What Makes Linked Data Special: 1 of 4

Before LinkedData:Informationwaslockedinsideproprietarydatabases,eachofwhichusedcustomdatabaseschemaandeverydatabaserecordwasaccessedbyidentifiersthatwere

onlyuniqueandintelligiblewithinthesystemwheretheyoriginated.

Theguardiansofthesedata‘fortresses’didn’tlikesharingdata.Ifithadtobedoneatallthendatawasextractedanddeliveredunderlockandkeywithcrypticinstructionsonhowtouseit.

AfterLinkedData:everyresource(concept,name,databaserecord,etc.)hasagloballyUniqueResourceIdentifier(URI)thatisintelligibletoanyoneelseontheplanet.

MeSH(MedicalSubjectHeadings):InternalMedicine

http://id.nlm.nih.gov/mesh/D007388

GettyArt&ArchitectureThesaurus:Renaissance

http://vocab.getty.edu/aat/300021140

LibraryofCongressNameAuthority:BarackObama

http://id.loc.gov/authorities/names/n94112934

GeoNames:London

http://www.geonames.org/2643743

EuropeanEnvironmentAgency:Inlandsurfacewaters

http://eunis.eea.europa.eu/habitats/58

WordNetLexicalDatabase:finance

http://wordnet-rdf.princeton.edu/wn31/101136358-n

WorldWideWeb Database

BeforeLinkedData:webhyperlinksweremeresignpoststootherwebpages.

AfterLinkedData:linksbecomesemantic,theyexpressthespecificreason

whytwoentitiesarerelated.

Thesesemanticallyexpressivelinks,calledpredicates,assertfactualstatementsandsupportmachinereasoning.Theyalsohavetheirown

URIsidentifyingtheirplaceinontologicalschema.

foaf:Topic owl:sameAs prov:wasInfluencedBy

Is Linked Data Always Open Data? If I create Linked Data is it automatically exposed to the public?

noopenisoptional

allLinkedDataiscapableofbeingshared

butLinkedDatacanalsoresidebehindthefirewall

LinkedEnterprise

LinkedOpenData

Whyitisgoodforyou1. Adoptingandre-usingLinked

OpenDatataxonomies2. SemanticEnrichment

Example1:Adoptingandre-usingLinkedOpenDataTaxonomies

Build Buy

Build BuyNewmantrafortaxonomyprojects:

ADOPT first

ADAPT second

CREATE third

Linked Open Data Taxonomy Sources

Jumpstartyourtaxonomyproject

Trustedauthorities

Manydifferentsubjectdomains

Millionsofconcepts

Manysourcesinthepublicdomain

Standardelectronicformat

Livequeryand/ordownload

When Do Third Party Taxonomies Work Best

Corporate&EnterpriseTaxonomies

STEMs:Science,Technology,Engineering&Mathematics

HCLS:HealthCare&LifeSciencesCulturalHeritageNewsMediaGeospatial

PersonNames

Products&ServicesCommodities

FinanceLegal&Regulatory

Example 1: Linked Canvas

Example 1: Getty AAT, IconClass & DBpedia Imported for Search / Browse

DBpedia• 1.3Mprimaryresources• 31Mrelationships&propertiesGettyAAT• 42Kprimaryresources• 14.7Mrelationships&propertiesIconClass• 40Kprimaryresources• 3.4Mrelationships&propertiesLCNAF• 9.5Mprimaryresources• 80Mrelationships&propertiesLCSH• 419Kprimaryresources• 3.9Mrelationships&properties

Totalinthissystem• 11.3Mprimaryresources• 133Mrelationships&properties

Example 1: Getty AAT, IconClass & DBpedia Imported for Search / Browse

ProcessofindexingavisualdetailinsideapaintingtotheDBpediacategoryresourceforLutes

http://dbpedia.org/resource/Category:Lutes

viatheFOAFpredicateDepicts

foaf:depicts

Example 1: Semantic Indexing Using Linked Open Data Taxonomies

Example 1: Linked Open Data – a World Wide Database

Forimageattributionspleasevisitwww.linkedcanvas.org

Example2:MappingtoLinkedOpenDataresourcesforSemanticEnrichment

Example 2: Semantic Enrichment – Internal record has minimal data

UseCaseAninternaltaxonomyofpersonnamesstoresonlyminimalinformation:First

Name,LastNameandafieldforBiographicNotes

Example 2: Semantic Enrichment – search for equivalent in external LOD source

ByclickingontheLinkedDatabuttonwecanautomaticallysearchforourpersonin

DBpediaoranyotherLinkedDatasourcesuchasVIAFor

Matchingresultsarereturnedandthechosen

entityselected

Example 2: Semantic Enrichment – mapping and choosing properties

Amappingrelationshipconnectstheinternaltaxonomyrecordtothe

externalLinkedDataresource.InthisinstancetheOWLpredicatesameAs isused.

Lastlyselectionsfromanarrayofdescriptive

propertiescanbemade.

Semantic Enrichment Benefits

1. Beforesemanticenrichmentwehadonlyournameandsomebriefbiographicnotes.

2. Aftersemanticenrichmentwehadtheseplusanauthoritativename,adetailedbiographicabstract,birthdate,birthplace.

3. Thenewdatacanbeseamlesslyblendedwithinternaldataforpresentationinscreens,reports andexportfiles.

4. URIlinksarestoredinthebackgroundtoprovideauthoritativeprovenanceinformationonwherethisdatacamefromandwhen.

Howitworks(techtalk)

Semantic Web,RDF, Triples, URIs, SPARQL

Fundamental Concepts

HowisLinkedDatadifferentfromotherdataandtraditional

relationaldatabases?

name: Charles Babbage name: Ada

Lovelaceinfluenced

Subject Predicate Object

<http://id.loc.gov/authorities/names/n50031102> prov:influenced <http://id.loc.gov/authorities/names/n78030997>

<http://id.loc.gov/authorities/names/n50031102> foaf:name ”Charles Babbage"

<http://id.loc.gov/authorities/names/n78030997> foaf:name “Ada Lovelace”

RDF Triples

A B C D

influenced influenced influenced

Science

MathsComputerScience

Astronomy

Astrophysics

CharlesBabbage

BlaisePascal

AdaLovelace

MarySomerville

France UnitedKingdom

PhysicalSciences

Physics

Graph Model

LC Name Authority File

LC Subject Headings

GeoNames

ComputationalTime

Size ofDataset

Graph Database

Relational Database

Pattern Matching and Nested Queries with Triplestores

RDF-XMLJSON-LDN-TriplesN-QuadsTurtleTriGN3

RDF Formats

Whyusetriplestoresinsteadofothertypesofgraphdatabase?

Linked Open Data Vocabularies

1. http://www.getty.edu/research/tools/vocabularies/lod/index.html2. http://www.iconclass.org/help/lod3. http://www.geonames.org/ontology/documentation.html4. http://id.loc.gov/

LODsourcescanbeavailablefordownloadorforlivequery… whichmethod

ofaccessisbest?

curl –H Content-type:text/turtle –upload-file ./authoritiesnames.nthttp://localhost:1234/repositories/linkedcanvas?graph=graphName

curl –X GET –H Accept:application/x-trighttp://localhost:1234/repositories/linkedcanvas

Importing and Exporting Linked Data Vocabularies

Describing a Primary Resource in Linked Data

1.http://vocab.getty.edu/queries#Full_Text_Search_Query

Free-Text Search using SPARQL

Graphdatabasesaren’tsupposetoworkthatwellwithfreetextsearch… howcanthis

beovercome?

Free-Text Search in Linked Canvas

GraphStoreHTTP

SPARQLendpoint

StaticfilesinRDFformats

Publishing Linked Open Data

Howtogetstarted

https://www.blazegraph.com/http://graphdb.ontotext.com/

Option 1: Get an Open Source Triple Storeand Some Good Reads

Ruth,Wood&ZaidmanManning(pub.)

Heath&BizerMorgan&Claypool(pub.)

Allemang &HendlerMorganKlaufman (pub.)

Option 2: Adopt, Adapt and Create Linked Dataas part of your Taxonomy Management

Jumpstartyourtaxonomyproject

Trustedauthorities

Manydifferentsubjectdomains

Millionsofconcepts

Manysourcesinthepublicdomain

Standardelectronicformat

Livequeryand/ordownload

Adopt any external ontology

Start minting HTTP-URI’s for everything you create

LinkedData

1. Awaytojump-starttaxonomyprojectsandreducecosts

2. Awaytotapintoexternalknowledgethatcanhelpansweryourbusinessquestions

3. Apowerfultoolforperformingcomplexsearchesandbuildingsmartapplications

Linked DataThe World is Your Database

Dave ClarkeSynaptica CEO

Gene LohSynaptica Software Architect

Thank you!

Visit us at Booth 201

kwm clarke loh lod 20161115 - green chameleon · © 2016 synaptica, llc what is linked data agenda...

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