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

©2016Synaptica,LLC www.synaptica.com

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

Data

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

üû

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

LCNAF

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

X Y

L

M N O

P Q

R

know

nFor

know

nFor

influenced influenced influenced

coun

tryO

fB

irth

Science

MathsComputerScience

Astronomy

Astrophysics

CharlesBabbage

BlaisePascal

AdaLovelace

MarySomerville

France UnitedKingdom

PhysicalSciences

Physics

NT

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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