Linked Data: Building a Semantic Web Ecosystem
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Nicholas Car
GA’s Data Architect
& member, Aust gov Linked Data WG
I THINK WE SHOULD
BUILD A LINKED DATA
SYSTEM
SYSTEM
?
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1.
Who is the AGLDWG and what does it do?
2.
Internal drivers: GA’s library and multi-collection use of LD
3.
Libraries and Semantic Web vocabs, current & future
4.
The Big Database in the Sky: the future Semantic Web
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“Linked Data provides a publishing paradigm in which not only
documents [web pages] but also data can be first class citizens
of the Web”
[1]
[1]
Linked Data: Evolving the Web into a Global Data SpaceHeath, T. & Bizer, C., 2011. Linked Data:
Evolving the Web into a Global Data SpaceJ. Hendler, ed., Morgan & Claypool. Available at:
http://linkeddatabook.com
.
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“Linked Data provides a publishing paradigm in which not only
documents [web pages] but also data can be first class citizens
of the Web”
[1]
The
Semantic Web
is an extension of the Web through
standards by the World Wide Web Consortium (W3C). The
standards promote common data formats and exchange
protocols
[2]
[1]
Linked Data: Evolving the Web into a Global Data SpaceHeath, T. & Bizer, C., 2011. Linked Data:
Evolving the Web into a Global Data SpaceJ. Hendler, ed., Morgan & Claypool. Available at:
http://linkeddatabook.com
.
[2]
https://en.wikipedia.org/wiki/Semantic_Web
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GA has always worked with standards:
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GA has always worked with standards:
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GA has always worked with standards
•
What’s new?
•
Semantic Web universality
•
Linked Data access mechanisms
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GA has always worked with standards
•
What’s new?
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Semantic Web universality
•
Linked Data access mechanisms
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GA has always worked with standards
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What’s new?
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Semantic Web universality
•
Linked Data access mechanisms
Dataset
Service
PROV, DCAT, Data Provider Node
…
Multiple models in play
at the same time.
Important for different
internal users
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GA has always worked with standards
•
What’s new?
•
Semantic Web universality
•
Linked Data access mechanisms
Multiple access methods.
Also important for internal
Users.
ISO 19115
ISO 19115-3
ISO 19115-1
DCAT
provenance
LD methods to choose
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GA has always worked with standards
•
What’s new?
•
Semantic Web universality
•
Linked Data access mechanisms
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Multi collection access – internal
Legacy X
Legacy Y
Legacy
Z
Linked
Data
Geoscience Australia
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GA has always worked with standards
•
What’s new?
•
Semantic Web universality
•
Linked Data access mechanisms
•
Multi collection access – internal/external
Legacy X
Legacy Y
Linked
Data
Geoscience Australia
System
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GA has always worked with standards
•
What’s new?
•
Semantic Web universality
•
Linked Data access mechanisms
•
Multi collection access – Library e.g.
Field
Notebooks
Photos
Samples
Catalogue
Geoscience Australia
Linked
Data
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GA has always worked with standards
•
What’s new?
•
Semantic Web universality
•
Linked Data access mechanisms
•
Multi collection access – Library e.g.
Field
Notebooks
Photos
Samples
Catalogue
Geoscience Australia
Linked
Data
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GA has always worked with standards
•
What’s new?
•
Semantic Web universality
•
Linked Data access mechanisms
•
Multi collection access – Library e.g.
Field Notebook
Image
Sample
These independent
collections now
operate as a federated
database
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The key to good Linked Data is good data management
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Libraries organise many things
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The key to good Linked Data is good data management
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Libraries organise many things
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Libraries have always worked with classification
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Ashurbanipal’s indexes
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LoC Subject Headings
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The key to good Linked Data is good data management
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Libraries organise many things
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Libraries have always worked with classification
•
Ashurbanipal’s indexes
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LoC Subject Headings
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Libraries have always worked with interoperable collection
mechanisms:
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OAI-PMH, MARC etc.
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Data management
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Classification
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Interoperability
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Data management
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Classification
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Interoperability
Still required!
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Data management
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Classification
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Interoperability
Helped by modern
vocabulary and
ontology tools
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Data management
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Classification
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Interoperability
The RVA vocab portal
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Data management
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Classification
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Interoperability
A particular vocab, managed by GA and others
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Data management
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Classification
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Interoperability
Feature Types relevant to a sample – managed list
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Data management
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Classification
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Interoperability
Helped by using
“normal” Internet
protocols
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Reminder:
“Linked Data provides a publishing paradigm in which not
only documents [web pages] but also data can be first
class citizens of the Web”
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DOIs point to web pages:
•
http://doi.org/10.1007/978-3-319-15994-2_9
https://link.springer.com/chapter/10.1007%2F978-3-319-15994-2_9
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DOIs point to web pages:
•
http://doi.org/10.1007/978-3-319-15994-2_9
https://link.springer.com/chapter/10.1007%2F978-3-319-15994-2_9
•
This is the HTML version of the DOI only!
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DOIs point to web pages:
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http://doi.org/10.1007/978-3-319-15994-2_9
https://link.springer.com/chapter/10.1007%2F978-3-319-15994-2_9
•
This is the HTML version of the DOI only!
•
Linked Data, machine readable, version:
•
http://doi.org/10.1007/978-3-319-15994-2_9
https://data.crossref.org/10.1007%2F978-3-319-15994-2_9
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DOIs point to web pages:
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http://doi.org/10.1007/978-3-319-15994-2_9
https://link.springer.com/chapter/10.1007%2F978-3-319-15994-2_9
•
This is the HTML version of the DOI only!
•
Linked Data, machine readable, version:
•
http://doi.org/10.1007/978-3-319-15994-2_9
https://data.crossref.org/10.1007%2F978-3-319-15994-2_9
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Web
Page
Web
Page
hyperlink
Normal web page linking
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Web
Page
Web
Page
Style
Sheet
hyperlink
typed
hyperlink
Normal web page linking
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Normal web page linking
Web
Page
Web
Page
Style
Sheet
hyperlink
typed
hyperlink
Semantic Web linking
Object
type A
Type C
Typ
e
B
typed
hyperlink
typed
hyperlink
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A Relational Database
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A Relational Database
A Graph Database
u48876
GA staff
member
Person
“Nick”
is a
is a
first name
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The Internet: a Virtual Graph Database
Subgraph
Subgraph
Subgraph
Subgraph
Subgraph
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The LOD Cloud
Linking Open Data cloud diagram 2017,
by Andrejs Abele, John P. McCrae, Paul Buitelaar,
Anja Jentzsch and Richard Cyganiak.
http://lod-cloud.net
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The LOD Cloud
Linking Open Data cloud diagram 2017,
by Andrejs Abele, John P. McCrae, Paul Buitelaar,
Anja Jentzsch and Richard Cyganiak.
http://lod-cloud.net
Universal uniqueness and
persistence are
very
hard
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The LOD Cloud
Linking Open Data cloud diagram 2017,
by Andrejs Abele, John P. McCrae, Paul Buitelaar,
Anja Jentzsch and Richard Cyganiak.
http://lod-cloud.net
Universal uniqueness and
persistence are
very
hard
Libraries know this
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The LOD Cloud
Linking Open Data cloud diagram 2017,
by Andrejs Abele, John P. McCrae, Paul Buitelaar,
Anja Jentzsch and Richard Cyganiak.
http://lod-cloud.net
Universal uniqueness and
persistence are
very
hard
Libraries know this
+ talk to the AGLDWG!
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Libraries role:
•
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Expect finer granules… of everything
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Who is the AGLDWG and what does it do?
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Internal drivers: GA’s library and multi-collection use of LD
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Libraries and Semantic Web vocabs, current & future
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The Big Database in the Sky: the future Semantic Web
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Data Architect
Geoscience Australia
nicholas.car@ga.gov.au
LINKED DATA
LINKED DATA
Explore the world of Linked Data from the perspective of Nicholas Car, a data architect and member of Aust.gov Linked Data WG. Uncover the significance of Linked Data, its role in evolving the web into a global data space, and the Australian Govt. Linked Data Working Group's initiatives. Dive into internal drivers, challenges, and the future of Semantic Web universality. Join the journey towards building a Linked Data system for a brighter digital future.
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Libraries & Linked Data From a Linked Data point of view Nicholas Car GA s Data Architect & member, Aust gov Linked Data WG I THINK WE SHOULD BUILD A LINKED DATA SYSTEM SYSTEM?
Outline 1. Who is the AGLDWG and what does it do? 2. Internal drivers: GA s library and multi-collection use of LD 3. Libraries and Semantic Web vocabs, current & future 4. The Big Database in the Sky: the future Semantic Web
What is Linked Data? Linked Data provides a publishing paradigm in which not only documents [web pages] but also data can be first class citizens of the Web [1] [1] Linked Data: Evolving the Web into a Global Data SpaceHeath, T. & Bizer, C., 2011. Linked Data: Evolving the Web into a Global Data SpaceJ. Hendler, ed., Morgan & Claypool. Available at: http://linkeddatabook.com.
What is Linked Data? Linked Data provides a publishing paradigm in which not only documents [web pages] but also data can be first class citizens of the Web [1] The Semantic Web is an extension of the Web through standards by the World Wide Web Consortium (W3C). The standards promote common data formats and exchange protocols[2] [1] Linked Data: Evolving the Web into a Global Data SpaceHeath, T. & Bizer, C., 2011. Linked Data: Evolving the Web into a Global Data SpaceJ. Hendler, ed., Morgan & Claypool. Available at: http://linkeddatabook.com. [2] https://en.wikipedia.org/wiki/Semantic_Web
Internal drivers: GAs library and multi-collection use of LD GA has always worked with standards:
Internal drivers: GAs library and multi-collection use of LD GA has always worked with standards:
Internal drivers: GAs library and multi-collection use of LD GA has always worked with standards What s new? Semantic Web universality Linked Data access mechanisms
Internal drivers: GAs library and multi-collection use of LD GA has always worked with standards What s new? Semantic Web universality Linked Data access mechanisms This is exciting stuff!
Internal drivers: GAs library and multi-collection use of LD GA has always worked with standards What s new? Semantic Web universality Linked Data access mechanisms Dataset Multiple models in play at the same time. Service Important for different internal users PROV, DCAT, Data Provider Node
Internal drivers: GAs library and multi-collection use of LD GA has always worked with standards What s new? Semantic Web universality Linked Data access mechanisms ISO 19115-1 ISO 19115 DCAT ISO 19115-3 Multiple access methods. provenance Also important for internal Users. LD methods to choose
Internal drivers: GAs library and multi-collection use of LD GA has always worked with standards What s new? Semantic Web universality Linked Data access mechanisms Multi collection access internal Geoscience Australia Linked Data Legacy X Legacy Y Legacy Z
Internal drivers: GAs library and multi-collection use of LD GA has always worked with standards What s new? Semantic Web universality Linked Data access mechanisms Multi collection access internal/external Geoscience Australia System Z Linked Data Legacy X Legacy Y
Internal drivers: GAs library and multi-collection use of LD GA has always worked with standards What s new? Semantic Web universality Linked Data access mechanisms Multi collection access Library e.g. Geoscience Australia Linked Data Samples Catalogue Field Photos Notebooks
Internal drivers: GAs library and multi-collection use of LD GA has always worked with standards What s new? Semantic Web universality Linked Data access mechanisms Multi collection access Library e.g. Geoscience Australia Linked Data Samples Catalogue Field Photos Notebooks
Internal drivers: GAs library and multi-collection use of LD GA has always worked with standards What s new? Semantic Web universality Linked Data access mechanisms Multi collection access Library e.g. Field Notebook These independent collections now operate as a federated database Image Sample
Libraries and Semantic Web vocabs, current & future The key to good Linked Data is good data management Libraries organise many things
Libraries and Semantic Web vocabs, current & future The key to good Linked Data is good data management Libraries organise many things Libraries have always worked with classification Ashurbanipal s indexes LoC Subject Headings
Libraries and Semantic Web vocabs, current & future The key to good Linked Data is good data management Libraries organise many things Libraries have always worked with classification Ashurbanipal s indexes LoC Subject Headings Libraries have always worked with interoperable collection mechanisms: OAI-PMH, MARC etc.
Libraries and Semantic Web vocabs, current & future Data management Classification Interoperability
Libraries and Semantic Web vocabs, current & future Data management Still required! Classification Interoperability
Libraries and Semantic Web vocabs, current & future Data management Classification Helped by modern vocabulary and ontology tools Interoperability
Libraries and Semantic Web vocabs, current & future Data management Classification Interoperability The RVA vocab portal
Libraries and Semantic Web vocabs, current & future Data management Classification Interoperability A particular vocab, managed by GA and others
Libraries and Semantic Web vocabs, current & future Data management Classification Interoperability Feature Types relevant to a sample managed list
Libraries and Semantic Web vocabs, current & future Data management Classification Interoperability Helped by using normal Internet protocols
Libraries and Semantic Web vocabs, current & future Reminder: Linked Data provides a publishing paradigm in which not only documents [web pages] but also data can be first class citizens of the Web
Example: DOIs DOIs point to web pages: http://doi.org/10.1007/978-3-319-15994-2_9 https://link.springer.com/chapter/10.1007%2F978-3-319-15994-2_9
Example: DOIs DOIs point to web pages: http://doi.org/10.1007/978-3-319-15994-2_9 https://link.springer.com/chapter/10.1007%2F978-3-319-15994-2_9 This is the HTML version of the DOI only!
Example: DOIs DOIs point to web pages: http://doi.org/10.1007/978-3-319-15994-2_9 https://link.springer.com/chapter/10.1007%2F978-3-319-15994-2_9 This is the HTML version of the DOI only! Linked Data, machine readable, version: http://doi.org/10.1007/978-3-319-15994-2_9 https://data.crossref.org/10.1007%2F978-3-319-15994-2_9
Example: DOIs DOIs point to web pages: http://doi.org/10.1007/978-3-319-15994-2_9 https://link.springer.com/chapter/10.1007%2F978-3-319-15994-2_9 This is the HTML version of the DOI only! Linked Data, machine readable, version: http://doi.org/10.1007/978-3-319-15994-2_9 https://data.crossref.org/10.1007%2F978-3-319-15994-2_9
The Big Database in the Sky: the future Semantic Web Normal web page linking Web Page Web Page hyperlink
The Big Database in the Sky: the future Semantic Web Normal web page linking typed hyperlink Style Sheet Web Page Web Page hyperlink
The Big Database in the Sky: the future Semantic Web Normal web page linking Semantic Web linking typed hyperlink typed hyperlink Style Sheet Type B Object type A Web Page Web Page typed hyperlink hyperlink Type C
The Big Database in the Sky: the future Semantic Web A Relational Database Node Edge Node u48876 is a GA staff member Nick u48876 first name GA staff member is a Person
The Big Database in the Sky: the future Semantic Web A Graph Database A Relational Database Node Edge Node first name Nick u48876 is a GA staff member Nick is a u48876 u48876 first name GA staff member is a Person GA staff member Person is a
The Big Database in the Sky: the future Semantic Web The Internet: a Virtual Graph Database Subgraph Subgraph Subgraph Subgraph Subgraph HTTP/Internet: the pipeline URIs: Semantic Web: the data model the DB/item keys
The Big Database in the Sky: the future Semantic Web The LOD Cloud Linking Open Data cloud diagram 2017, by Andrejs Abele, John P. McCrae, Paul Buitelaar, Anja Jentzsch and Richard Cyganiak. http://lod-cloud.net
The Big Database in the Sky: the future Semantic Web The LOD Cloud Linking Open Data cloud diagram 2017, by Andrejs Abele, John P. McCrae, Paul Buitelaar, Anja Jentzsch and Richard Cyganiak. http://lod-cloud.net Universal uniqueness and persistence are very hard
The Big Database in the Sky: the future Semantic Web The LOD Cloud Linking Open Data cloud diagram 2017, by Andrejs Abele, John P. McCrae, Paul Buitelaar, Anja Jentzsch and Richard Cyganiak. http://lod-cloud.net Universal uniqueness and persistence are very hard Libraries know this
The Big Database in the Sky: the future Semantic Web The LOD Cloud Linking Open Data cloud diagram 2017, by Andrejs Abele, John P. McCrae, Paul Buitelaar, Anja Jentzsch and Richard Cyganiak. http://lod-cloud.net Universal uniqueness and persistence are very hard Libraries know this + talk to the AGLDWG!
The Big Database in the Sky: the future Semantic Web Libraries role: Keep doing your core work of Data management & Classification Keep striving for more Interoperability
The Big Database in the Sky: the future Semantic Web Libraries role: Keep doing your core work of Data management & Classification Keep striving for more Interoperability Keep working with data people A 2-way sharing (I ve learned a lot)
The Big Database in the Sky: the future Semantic Web Libraries role: Keep doing your core work of Data management & Classification Keep striving for more Interoperability Keep working with data people Expect finer granules of everything
Outline 1. Who is the AGLDWG and what does it do? 2. Internal drivers: GA s library and multi-collection use of LD 3. Libraries and Semantic Web vocabs, current & future 4. The Big Database in the Sky: the future Semantic Web
Nicholas Car Data Architect Geoscience Australia nicholas.car@ga.gov.au LINKED DATA LINKED DATA
