why link?

Richard Wallis@rjw

Why Link?Linking has value for data

big and small

Leading Semantic WebTechnology


40 Year RichMetadata Heritage


40 Year RichMetadata Heritage

Shared InnovationEthos

kasabi.com

RelatingStuff

?Finding Stuff

RelatingStuff

?

Finding StuffRelating Stuff

?

Finding StuffRelating Stuff

Not a human-scale challenge...

Which ‘thing’ are you referencing ...


Feed of Weather/Buoy Data•Updated every 6 mins•Temp - Air/Water•Humidity•Wind - Speed/Direction•Atmospheric Pressure

http://www.wunderground.com

Linked Data

Linked DataBuilt on Semantic Web Standards

Linked DataBuilt on Semantic Web Standards

All about identifying and linking things

Thing

Identifying things

Identifying things

1969-059A

Identifying things

spacecraft/1969-059A

1969-059A

Identifying things


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

1969-059A

Identifying things


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

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

1969-059A

with URIs

Things have attributeshttp://nasa.dataincubator.org/spacecraft/1969-059A


28801.0kg


28801.0kg

Columbia


28801.0kg

Columbia

Apollo 11 CSM

CSM-107

United States

Cape Canaveral

Saturn 5


.../spacecraft/1969-059A

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

⤵mass

28801.0


⤵mass

28801.0

Apollo 11 CSM⤵name


⤵mass

28801.0

Apollo 11 CSM⤵⤵name name


Columbia

⤵⤵mass

28801.0


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

1969-059A

../launch/1969-059

Columbia

⤵⤵mass

28801.0


launch⤵

date


../launch/1969-059

Columbia

16 July 1969

⤵⤵mass

28801.0


launch⤵

date

⤵site


../launch/1969-059

../cape canaveral

Columbia

16 July 1969

⤵⤵mass

28801.0


launch⤵

date

⤵site

⤵lat


../launch/1969-059

../cape canaveral

Columbia

16 July 1969

N 28° 27' 31''

⤵⤵mass

28801.0


launch⤵

date

⤵site

W 80° 31' 59''

⤵⤵lat

long


../launch/1969-059

../cape canaveral

Columbia

16 July 1969

N 28° 27' 31''

⤵⤵mass

28801.0


launch⤵

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''” . W 80° 31' 59''

⤵⤵lat

long


../launch/1969-059

../cape canaveral

Columbia

16 July 1969

N 28° 27' 31''

⤵⤵mass

28801.0


launch⤵

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''” .

RDF

W 80° 31' 59''

⤵⤵lat

long


../launch/1969-059

../cape canaveral

Columbia

16 July 1969

N 28° 27' 31''

RDF Triple

RDF Triple

Thing attribute value

property

RDF Triple

Thing value

property

RDF Triple

Thing value

Thing property Thing

property

RDF Triple

Thing value


../person/A

property

RDF Triple

Thing value


../person/A hasParent

property

RDF Triple

Thing value


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

property

RDF Triple

Thing value


../person/B

../person/B


property

RDF Triple

Thing value


../person/B

name../person/B


property

“Eric”

RDF Triple

Thing value


../person/B

name../person/B


property

“Eric”

RDF Triple

Thing value


../person/B

name../person/B


Merging

property

“Eric”

RDF Triple

Thing value


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

Merging

RDF TripleMerging

RDF TripleMerging

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

Linked Data Principles

Linked Data Principles1. Use URIs as names for things


2. Use HTTP URIs so people can look up those names



3. When someone looks up a URI, provide useful information, using the standards - RDF



3. When someone looks up a URI, provide useful information, using the standards - RDF

4. Include links to other URIs, so that they can discover more

Tim Berners-Lee - 2006

Feed of Weather/Buoy Data•Updated every 6mins•Temp - Air/Water•Humidity•Wind - Speed/Direction•Atmospheric Pressure




http://dbpedia.org/resource/Boston



http://dbpedia.org/resource/Boston%2C_Lincolnshirehttp://dbpedia.org/resource/Boston


http://dbpedia.org/resource/Boston%2C_Lincolnshire





Linked Data example

What do I need to know?Linked Data

What do I need to know?

•Globally distributed / adopted

Linked Data



•Still evolving

Linked Data



•Still evolving

•Built on Web standards

Linked Data



•Still evolving


•Low barrier to

Linked Data

data



•Still evolving


•Low barrier to

Linked Data

[other people’s] data



•Still evolving


•Low barrier to

•Integration without ‘need’ for coordination

Linked Data




•Still evolving


•Low barrier to

•Integration without ‘need’ for coordination

•Follow-your-nose discovery/navigation

Linked Data


What do I need to know?Linked Data


•Not all Linked Data is Open

Linked Data



•Not all Open Data is Linked

Linked Data




•All your data does not need to be open

Linked Data




•All your data does not need to be open

•Linking your [open] data liberates it’s value

Linked Data

Linked Data

How much do I need to do?

•As much as practicable

Linked Data



•Identify your ‘things’ and link to ...

Linked Data




- add value to your data

Linked Data




- add value to your data

- help others discover

Linked Data

Linked Data

Who is doing it?Linked Data

Richard Wallis@rjw


big and small

Richard Wallis@rjw


big and small

http://slideshare.net/rjw

why link?

Technology

rdf triplething attributevalue

launch date

persona hasparent

cape launch

rdf triple mergingthe

canaverallat date

feed of weatherbuoy

cape canaverallat n