Linked data under the hood

Tim Hodson

Technical Consultant

@timhodson

#talisldod

Linked DataUnder the Hood

Thursday, 20 October 11

Where do I start?



http://www.flickr.com/photos/thienzieyung/5147954561

SPARQLtr

iple

RDFontologypropertyid

entifie

r

urlresourceAPI

merg

ing

modeldereference





SPARQL

trip

le

RDF

ontology

property

identif

ier

url

resource API

merg

ing

model dereference




Simple Process

Model

Nam

e

Describ

e

Convert

Publish


Simple Process

Model

Nam

e

Describ

e

Convert

Publish


Simple Process

Model


Look at your data

http://www.flickr.com/photos/pss/4876189045/




What am I looking for?


http://www.flickr.com/photos/striatic/729822




Simple Process

Model


Simple Process

Model

Nam

e


identifier


identifier

thing


identifier

thing


identifier

thing1969-059A


identifier

thingspacecraft/1969-059A

1969-059A


identifier


nasa.dataincubator.org/spacecraft/1969-059A

1969-059A


identifier



http://nasa.dataincubator.org/spacecraft/1969-059A

1969-059A


identifier




1969-059A

28801.0kg


identifier




1969-059A

28801.0kg

Columbia

Apollo 11 CSM

CSM-107


identifier




1969-059A

28801.0kg

Columbia

Apollo 11 CSM

CSM-107

United States


identifier




1969-059A

28801.0kg

Columbia

Apollo 11 CSM

CSM-107

United States

Cape Canaveral


identifier




1969-059A

28801.0kg

Columbia

Apollo 11 CSM

CSM-107

United States

Cape Canaveral

Saturn 5


identifier




1969-059A

28801.0kg

Columbia

Apollo 11 CSM

CSM-107

United States

Cape Canaveral

Saturn 5


identifier


identifier

.../1969-059A


identifier

.../1969-059A

⤵

mass

28801.0


identifier

.../1969-059A

⤵

mass

28801.0

Apollo 11 CSM⤵name


identifier

.../1969-059A

⤵

mass

28801.0

Apollo 11 CSM⤵ Columbia⤵name name


identifier

.../1969-059A

⤵⤵mass

28801.0


launch

../launch:1969-059


identifier

.../1969-059A

⤵⤵mass

28801.0


launch16 July 1969⤵

date../launch:1969-059


identifier

.../1969-059A

⤵⤵mass

28801.0



date

site⤵../launch:1969-059

Cape Canaveral


identifier

.../1969-059A

⤵⤵mass

28801.0



date

site

N 28° 27' 31''⤵lat

⤵../launch:1969-059

Cape Canaveral


identifier

.../1969-059A

⤵⤵mass

28801.0



date

site

N 28° 27' 31''

W 80° 31' 59''

⤵ ⤵lat

long

⤵../launch:1969-059

Cape Canaveral


identifier

.../1969-059A

⤵⤵mass

28801.0



date

site<../1969-059A> mass 28801.0 .<../1969-059A> name “Apollo 11 CSM” .<../1969-059A> name “Columbia” .<../1969-059A> launch <../launch/1969-059> .<../launch/1969-059> date 1969-07-16 .<../launch/1969-059> site <..site/capecanaveral> .<..site/capecanaveral> lat “N 28° 27' 31''” .<..site/capecanaveral> long “W 80° 31' 59''” .

N 28° 27' 31''

W 80° 31' 59''

⤵ ⤵lat

long

⤵../launch:1969-059

Cape Canaveral


That all looks a bit scary!


An easy structure for capturing dataSimple format


subject value


property


subject value

thingproperty

thing


property


subject value

thingproperty

thing


property

An easy way to bung stuff togetherSimple merging


subject value

thingproperty

thing

../person/A


property



subject value

thingproperty

thing

../person/A hasParent


property



subject value

thingproperty

thing

../person/B../person/A hasParent


property



subject value

thingproperty

thing

../person/B

../person/B



property



subject value

thingproperty

thing

../person/B

name../person/B



property



subject value

thingproperty

thing

../person/B

name../person/B



“Eric”

property



subject value

thingproperty

thing

../person/B

name../person/B



“Eric”

property



subject value

thingproperty

thing

name../person/B../person/A hasParent


“Eric”

property



RDF TripleMerging


RDF TripleMerging

The same identifier in a different place is still the same thing



Simple Process

Model

Nam

e


Simple Process

Model

Nam

e

Describ

e



Properties?


Properties?

Classes?


describe why something is linkedProperties?

Classes?


describe why something is linked

group similarly typed things together

Properties?

Classes?


How do I know what terms to

use?


Ask someone


Ask someone

•schemapedia.com


Ask someone

•schemapedia.com•scemacache.com


Ask someone

•schemapedia.com•scemacache.com•sindice.com


Why don’t I just use my own

terms for things?




Add ValueLink to external sources


Simple Process

Model

Nam

e

Describ

e


Simple Process

Model

Nam

e

Describ

e

Convert


Conversion


•Database / spreadsheet export

Conversion


•Database / spreadsheet export- Script/program convert

Conversion



•Pull existing Linked Data from sites

Conversion



•Pull existing Linked Data from sites- URI matching

Conversion




- Linksets

Conversion




- Linksets

•Google Refine

Conversion




- Linksets

•Google Refine- Facet analysis

Conversion




- Linksets

•Google Refine- Facet analysis

- Reconciliation API

Conversion


What does my data look like

now?


RDF Flavours

16 July 1969⤵date

⤵../launch:1969-059

Cape Canaveral


•RDF/XML

RDF Flavours

16 July 1969⤵date

⤵../launch:1969-059

Cape Canaveral


•RDF/XMLMachine to machine

RDF Flavours

16 July 1969⤵date

⤵../launch:1969-059

Cape Canaveral


•RDF/XML

•N-TriplesMachine to machine

RDF Flavours

16 July 1969⤵date

⤵../launch:1969-059

Cape Canaveral


•RDF/XML

•N-TriplesMachine to machine

Processing

RDF Flavours

16 July 1969⤵date

⤵../launch:1969-059

Cape Canaveral


•RDF/XML

•N-Triples

•Turtle

Machine to machine

Processing

RDF Flavours

16 July 1969⤵date

⤵../launch:1969-059

Cape Canaveral


•RDF/XML

•N-Triples

•Turtle

Machine to machine

Processing

Human readable

RDF Flavours

16 July 1969⤵date

⤵../launch:1969-059

Cape Canaveral


•RDF/XML

•N-Triples

•Turtle

•RDFa

Machine to machine

Processing

Human readable

RDF Flavours

16 July 1969⤵date

⤵../launch:1969-059

Cape Canaveral


•RDF/XML

•N-Triples

•Turtle

•RDFa

Machine to machine

Processing

Human readable

Html embedded

RDF Flavours

16 July 1969⤵date

⤵../launch:1969-059

Cape Canaveral


•RDF/XML

•N-Triples

•Turtle

•RDFa

Machine to machine

Processing

Human readable

Html embedded

All valid RDF

RDF Flavours

16 July 1969⤵date

⤵../launch:1969-059

Cape Canaveral


Simple Process

Model

Nam

e

Describ

e

Convert


Simple Process

Model

Nam

e

Describ

e

Convert

Publish


Put it on a web server

http://www.flickr.com/photos/traftery/4773457853




SPARQL


SPARQL RDF Query LanguageSPARQL


SPARQL RDF Query Language

•Triple pattern matching

SPARQL




SPARQL

16 July 1969⤵date

⤵../launch:1969-059

Cape Canaveral




- uses Turtle

SPARQL

16 July 1969⤵date

⤵../launch:1969-059

Cape Canaveral




- uses Turtle

SPARQL




- uses Turtle

•Requires a SPARQL-endpoint

SPARQL




- uses Turtle


•Backed by a Triple Store

SPARQL




- uses Turtle



- Local hosted

SPARQL




- uses Turtle



- Local hosted

- Hosted

SPARQL




- uses Turtle



- Local hosted

- Hosted

- Managed Service - Talis

SPARQL


eh?


Linked Data Views


Alternative views of your dataLinked Data Views


Alternative views of your data

•Linked Data API

Linked Data Views



•Linked Data API- Puelia

Linked Data Views




- Elda

Linked Data Views




- Elda

•Bespoke Views

Linked Data Views




- Elda

•Bespoke Views- Hand crafted webpages

Linked Data Views




- Elda



Linked Data Views




- Elda


•Backed by a Triple Store- Local hosted

Linked Data Views




- Elda



- Hosted

Linked Data Views




- Elda



- Hosted

- Managed Service - Talis

Linked Data Views





Links


Follow your noseLinks



Follow your noseLinks




Is RDF the only way to do Linked

Data?



Web Standards


But I just want to let people use

my data.


http://www.flickr.com/photos/jwilde/3499946512



Accessing your Data



Accessing your Data

Data API



Accessing your Data

Data API}All have APIs



Accessing your Data

Data API}All have APIs

All different!


Summary

Model

Nam

e

Describ

e

Convert

Publish

SPARQL

trip

le

RDFontologypropertyid

entifie

r

urlresourceAPI

merg

ing

model


Summary

Model

Nam

e

Describ

e

Convert

Publish

SPARQL

triple

RDFontologyproperty

identifier

url resourceAPI

merging

model



trip

leRDFURI





triple

RDF

URI





http://consulting.talis.com




Technology

Linked data under the hood