Linked Data Under the Hood
146
Tim Hodson Technical Consultant @timhodson #talisldod Linked Data Under the hood
-
Upload
talis-consulting -
Category
Technology
-
view
637 -
download
1
description
Presentation by Tim Hodson at the Talis Event 'The Web's Influence on Your Data' in London - 20th September 2011
Transcript of Linked Data Under the Hood
Tim Hodson
Technical Consultant
@timhodson
#talisldod
Linked DataUnder the hood
Where do I start?
http://www.flickr.com/photos/thienzieyung/5147954561
SPARQLtr
iple
RDFontologypropertyid
entifie
r
urlresourceAPI
merg
ing
modeldereference
http://www.flickr.com/photos/thienzieyung/5147954561
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
thingspacecraft/1969-059A
nasa.dataincubator.org/spacecraft/1969-059A
1969-059A
identifier
thingspacecraft/1969-059A
nasa.dataincubator.org/spacecraft/1969-059A
http://nasa.dataincubator.org/spacecraft/1969-059A
1969-059A
identifier
thingspacecraft/1969-059A
nasa.dataincubator.org/spacecraft/1969-059A
http://nasa.dataincubator.org/spacecraft/1969-059A
1969-059A
28801.0kg
identifier
thingspacecraft/1969-059A
nasa.dataincubator.org/spacecraft/1969-059A
http://nasa.dataincubator.org/spacecraft/1969-059A
1969-059A
28801.0kg
Columbia
Apollo 11 CSM
CSM-107
identifier
thingspacecraft/1969-059A
nasa.dataincubator.org/spacecraft/1969-059A
http://nasa.dataincubator.org/spacecraft/1969-059A
1969-059A
28801.0kg
Columbia
Apollo 11 CSM
CSM-107
United States
identifier
thingspacecraft/1969-059A
nasa.dataincubator.org/spacecraft/1969-059A
http://nasa.dataincubator.org/spacecraft/1969-059A
1969-059A
28801.0kg
Columbia
Apollo 11 CSM
CSM-107
United States
Cape Canaveral
identifier
thingspacecraft/1969-059A
nasa.dataincubator.org/spacecraft/1969-059A
http://nasa.dataincubator.org/spacecraft/1969-059A
1969-059A
28801.0kg
Columbia
Apollo 11 CSM
CSM-107
United States
Cape Canaveral
Saturn 5
identifier
thingspacecraft/1969-059A
nasa.dataincubator.org/spacecraft/1969-059A
http://nasa.dataincubator.org/spacecraft/1969-059A
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
Apollo 11 CSM⤵ Columbia⤵name name
launch
../launch:1969-059
identifier
.../1969-059A
⤵⤵mass
28801.0
Apollo 11 CSM⤵ Columbia⤵name name
launch16 July 1969⤵
date../launch:1969-059
identifier
.../1969-059A
⤵⤵mass
28801.0
Apollo 11 CSM⤵ Columbia⤵name name
launch16 July 1969⤵
date
site⤵../launch:1969-059
Cape Canaveral
identifier
.../1969-059A
⤵⤵mass
28801.0
Apollo 11 CSM⤵ Columbia⤵name name
launch16 July 1969⤵
date
site
N 28° 27' 31''⤵lat
⤵../launch:1969-059
Cape Canaveral
identifier
.../1969-059A
⤵⤵mass
28801.0
Apollo 11 CSM⤵ Columbia⤵name name
launch16 July 1969⤵
date
site
N 28° 27' 31''
W 80° 31' 59''
⤵ ⤵lat
long
⤵../launch:1969-059
Cape Canaveral
identifier
.../1969-059A
⤵⤵mass
28801.0
Apollo 11 CSM⤵ Columbia⤵name name
launch16 July 1969⤵
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
An easy structure for capturing dataSimple format
property
subject value
thingproperty
thing
An easy structure for capturing dataSimple format
property
subject value
thingproperty
thing
An easy structure for capturing dataSimple format
property
An easy way to bung stuff togetherSimple merging
subject value
thingproperty
thing
../person/A
An easy structure for capturing dataSimple format
property
An easy way to bung stuff togetherSimple merging
subject value
thingproperty
thing
../person/A hasParent
An easy structure for capturing dataSimple format
property
An easy way to bung stuff togetherSimple merging
subject value
thingproperty
thing
../person/B../person/A hasParent
An easy structure for capturing dataSimple format
property
An easy way to bung stuff togetherSimple merging
subject value
thingproperty
thing
../person/B
../person/B
../person/A hasParent
An easy structure for capturing dataSimple format
property
An easy way to bung stuff togetherSimple merging
subject value
thingproperty
thing
../person/B
name../person/B
../person/A hasParent
An easy structure for capturing dataSimple format
property
An easy way to bung stuff togetherSimple merging
subject value
thingproperty
thing
../person/B
name../person/B
../person/A hasParent
An easy structure for capturing dataSimple format
“Eric”
property
An easy way to bung stuff togetherSimple merging
subject value
thingproperty
thing
../person/B
name../person/B
../person/A hasParent
An easy structure for capturing dataSimple format
“Eric”
property
An easy way to bung stuff togetherSimple merging
subject value
thingproperty
thing
name../person/B../person/A hasParent
An easy structure for capturing dataSimple format
“Eric”
property
An easy way to bung stuff togetherSimple merging
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 and Classes
Properties and Classes
Properties?
Properties and Classes
Properties?
Classes?
they describe why something is linked
Properties and Classes
Properties?
Classes?
they describe why something is linked
Properties and Classes
they group similarly typed things together
Properties?
Classes?
How do I know what terms to
use?
Tools
• prefix.cc
Tools
• prefix.cc
- namespace lookup
Tools
• prefix.cc
- namespace lookup
• schemapedia.com, schemacache.com
Tools
• prefix.cc
- namespace lookup
• schemapedia.com, schemacache.com
- vocabulary search
Tools
• prefix.cc
- namespace lookup
• schemapedia.com, schemacache.com
- vocabulary search
• sindice.com, ckan.net, LOD Diagram
Tools
• prefix.cc
- namespace lookup
• schemapedia.com, schemacache.com
- vocabulary search
• sindice.com, ckan.net, LOD Diagram
- identify data sets to link with
Tools
• prefix.cc
- namespace lookup
• schemapedia.com, schemacache.com
- vocabulary search
• sindice.com, ckan.net, LOD Diagram
- identify data sets to link with
• Kasabi Linked Data Marketplace
Tools
• prefix.cc
- namespace lookup
• schemapedia.com, schemacache.com
- vocabulary search
• sindice.com, ckan.net, LOD Diagram
- identify data sets to link with
• Kasabi Linked Data Marketplace
- access other data sources
Tools
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
•Database / spreadsheet export- Script/program convert
•Pull existing Linked Data from sites
Conversion
•Database / spreadsheet export- Script/program convert
•Pull existing Linked Data from sites- URI matching
Conversion
•Database / spreadsheet export- Script/program convert
•Pull existing Linked Data from sites- URI matching
- Linksets
Conversion
•Database / spreadsheet export- Script/program convert
•Pull existing Linked Data from sites- URI matching
- Linksets
•Google Refine
Conversion
•Database / spreadsheet export- Script/program convert
•Pull existing Linked Data from sites- URI matching
- Linksets
•Google Refine- Facet analysis
Conversion
•Database / spreadsheet export- Script/program convert
•Pull existing Linked Data from sites- URI matching
- 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 RDF Query Language
•Triple pattern matching
SPARQL
16 July 1969⤵date
⤵../launch:1969-059
Cape Canaveral
SPARQL RDF Query Language
•Triple pattern matching
- uses Turtle
SPARQL
16 July 1969⤵date
⤵../launch:1969-059
Cape Canaveral
SPARQL RDF Query Language
•Triple pattern matching
- uses Turtle
SPARQL
SPARQL RDF Query Language
•Triple pattern matching
- uses Turtle
•Requires a SPARQL-endpoint
SPARQL
SPARQL RDF Query Language
•Triple pattern matching
- uses Turtle
•Requires a SPARQL-endpoint
•Backed by a Triple Store
SPARQL
SPARQL RDF Query Language
•Triple pattern matching
- uses Turtle
•Requires a SPARQL-endpoint
•Backed by a Triple Store
- Local hosted
SPARQL
SPARQL RDF Query Language
•Triple pattern matching
- uses Turtle
•Requires a SPARQL-endpoint
•Backed by a Triple Store
- Local hosted
- Hosted
SPARQL
SPARQL RDF Query Language
•Triple pattern matching
- uses Turtle
•Requires a SPARQL-endpoint
•Backed by a Triple Store
- Local hosted
- Hosted
- Managed Service - Talis
SPARQL
eh?
Linked Data Views
HTML based views of your dataLinked Data Views
HTML based views of your data
•Linked Data API
Linked Data Views
HTML based views of your data
•Linked Data API- Puelia
Linked Data Views
HTML based views of your data
•Linked Data API- Puelia
- Elda
Linked Data Views
HTML based views of your data
•Linked Data API- Puelia
- Elda
•Bespoke Views
Linked Data Views
HTML based views of your data
•Linked Data API- Puelia
- Elda
•Bespoke Views- Hand crafted webpages
Linked Data Views
HTML based views of your data
•Linked Data API- Puelia
- Elda
•Bespoke Views- Hand crafted webpages
•Backed by a Triple Store
Linked Data Views
HTML based views of your data
•Linked Data API- Puelia
- Elda
•Bespoke Views- Hand crafted webpages
•Backed by a Triple Store- Local hosted
Linked Data Views
HTML based views of your data
•Linked Data API- Puelia
- Elda
•Bespoke Views- Hand crafted webpages
•Backed by a Triple Store- Local hosted
- Hosted
Linked Data Views
HTML based views of your data
•Linked Data API- Puelia
- Elda
•Bespoke Views- Hand crafted webpages
•Backed by a Triple Store- Local hosted
- 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
http://www.flickr.com/photos/jwilde/3499946512
Accessing your Data
http://www.flickr.com/photos/jwilde/3499946512
Accessing your Data
Data API
http://www.flickr.com/photos/jwilde/3499946512
Accessing your Data
Data API}All have APIs
http://www.flickr.com/photos/jwilde/3499946512
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
http://www.flickr.com/photos/thienzieyung/5147954561
trip
leRDFURI
http://www.flickr.com/photos/thienzieyung/5147954561
triple
RDF
URI
