ways of thinking about linked data
DESCRIPTION
A presentation I've been using with various audiences who want to understand the principles behind Linked Data from a non-technical perspective. Doesn't tell you much without hearing the words with it...TRANSCRIPT
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Ways of thinking about Linked Data
Rob Styles, Senior Technical [email protected]
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A brief history of the Web.
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The Web is not The Internet.
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1990 — Tim Berners-Lee starts WorldWideWeb
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1990 — Tim Berners-Lee starts WorldWideWeb
2000 — Jimmy Wales starts Wikipedia
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1980 — Tim Berners-Lee wrote Enquire-Within-Upon-Everything
1990 — Tim Berners-Lee starts WorldWideWeb
2000 — Jimmy Wales starts Wikipedia
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1980 — Tim Berners-Lee wrote Enquire-Within-Upon-Everything
1990 — Tim Berners-Lee starts WorldWideWeb
2000 — Jimmy Wales starts Wikipedia
2007 — Tim Berners-Lee starts Linking Open Data
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What are people looking for?
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What are people looking for?
1. roberta mancino
2. tokyo sandblaster
3. josiah viera
4. marcus dupree
5. missle launch california
6. missile launch california
7. jack mcbrayer
8. dot jones
9. paul millsap
10. ab cuts
http://www.google.com/trends/hottrends?sa=X&date=2010-11-9
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Format.
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Search Engine Results.
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PageRank.
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Ambiguity.(the Paris Hilton problem)
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Wikipedia.
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Data is just people saying stuff.
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http://www.bbc.co.uk/news/uk-11372185
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Semantics is meaning.
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Syntax is the rules.
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The Web of Documents;a Syntactic Web.
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The Web of Data;a Semantic Web.
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Use web addresses as names for real things.
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http://www.bbc.co.uk/nature/species/Lion#species
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When someone requests that URL, give back useful information.
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Provide links to other things, both in your own site and elsewhere.
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Linked Data is not* about publishing data on the web, it’s about making the things your
website says machine-readable.
* just
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• “Mallard” is a Species.
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• “Mallard” is a Species.
• “Mallard” has a scientific name of “Anas Platyrhynchos”.
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• “Mallard” is a Species.
• “Mallard” has a scientific name of “Anas Platyrhynchos”.
• “Mallard” has a common name of “Wild duck”.
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• “Mallard” is a Species.
• “Mallard” has a scientific name of “Anas Platyrhynchos”.
• “Mallard” has a common name of “Wild duck”.
• “Mallard” lives in the “Lake” habitat (amongst others).
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• “Mallard” is a Species.
• “Mallard” has a scientific name of “Anas Platyrhynchos”.
• “Mallard” has a common name of “Wild duck”.
• “Mallard” lives in the “Lake” habitat (amongst others).
• “Wild Nature” is a video clip.
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• “Mallard” is a Species.
• “Mallard” has a scientific name of “Anas Platyrhynchos”.
• “Mallard” has a common name of “Wild duck”.
• “Mallard” lives in the “Lake” habitat (amongst others).
• “Wild Nature” is a video clip.
• “Wild Nature” is about the species “Mallard”.
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• “Mallard” is a Species.
• “Mallard” has a scientific name of “Anas Platyrhynchos”.
• “Mallard” has a common name of “Wild duck”.
• “Mallard” lives in the “Lake” habitat (amongst others).
• “Wild Nature” is a video clip.
• “Wild Nature” is about the species “Mallard”.
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• “Mallard” is a Species.
• “Mallard” has a scientific name of “Anas Platyrhynchos”.
• “Mallard” has a common name of “Wild duck”.
• “Mallard” lives in the “Lake” habitat (amongst others).
• “Wild Nature” is a video clip.
• “Wild Nature” is about the species “Mallard”.
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• “Mallard” is a Species.
• “Mallard” has a scientific name of “Anas Platyrhynchos”.
• “Mallard” has a common name of “Wild duck”.
• “Mallard” lives in the “Lake” habitat (amongst others).
• “Wild Nature” is a video clip.
• “Wild Nature” is about the species “Mallard”.
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• “Mallard” is a Species.
• “Mallard” has a scientific name of “Anas Platyrhynchos”.
• “Mallard” has a common name of “Wild duck”.
• “Mallard” lives in the “Lake” habitat (amongst others).
• “Wild Nature” is a video clip.
• “Wild Nature” is about the species “Mallard”.
MallardSpecies
a
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• “Mallard” is a Species.
• “Mallard” has a scientific name of “Anas Platyrhynchos”.
• “Mallard” has a common name of “Wild duck”.
• “Mallard” lives in the “Lake” habitat (amongst others).
• “Wild Nature” is a video clip.
• “Wild Nature” is about the species “Mallard”.
MallardSpecies
a
Anas Platyrhynchos
scientific name
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• “Mallard” is a Species.
• “Mallard” has a scientific name of “Anas Platyrhynchos”.
• “Mallard” has a common name of “Wild duck”.
• “Mallard” lives in the “Lake” habitat (amongst others).
• “Wild Nature” is a video clip.
• “Wild Nature” is about the species “Mallard”.
MallardSpecies
a
Anas Platyrhynchos
scientific name
Wild duck
common name
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• “Mallard” is a Species.
• “Mallard” has a scientific name of “Anas Platyrhynchos”.
• “Mallard” has a common name of “Wild duck”.
• “Mallard” lives in the “Lake” habitat (amongst others).
• “Wild Nature” is a video clip.
• “Wild Nature” is about the species “Mallard”.
MallardSpecies
a
Anas Platyrhynchos
scientific name
Wild duck
common name
Lake Habitat
a
lives in
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• “Mallard” is a Species.
• “Mallard” has a scientific name of “Anas Platyrhynchos”.
• “Mallard” has a common name of “Wild duck”.
• “Mallard” lives in the “Lake” habitat (amongst others).
• “Wild Nature” is a video clip.
• “Wild Nature” is about the species “Mallard”.
MallardSpecies
a
Anas Platyrhynchos
scientific name
Wild Nature
VideoClipa
Wild duck
common name
Lake Habitat
a
lives in
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• “Mallard” is a Species.
• “Mallard” has a scientific name of “Anas Platyrhynchos”.
• “Mallard” has a common name of “Wild duck”.
• “Mallard” lives in the “Lake” habitat (amongst others).
• “Wild Nature” is a video clip.
• “Wild Nature” is about the species “Mallard”.
MallardSpecies
a
Anas Platyrhynchos
scientific name
Wild Nature
VideoClipa
aboutWild duck
common name
Lake Habitat
a
lives in
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Properties of Linked Data
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Properties of Linked Data
• Repeated values are simple(hard in CSV, simple in XML)
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Properties of Linked Data
• Repeated values are simple(hard in CSV, simple in XML)
• Removing duplication is simple(no mechanism in CSV, or XML)
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Properties of Linked Data
• Repeated values are simple(hard in CSV, simple in XML)
• Removing duplication is simple(no mechanism in CSV, or XML)
• Many-to-Many relationships are simple(no built-in mechanism in CSV, or XML, complicated in RDBMS)
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Properties of Linked Data
• Repeated values are simple(hard in CSV, simple in XML)
• Removing duplication is simple(no mechanism in CSV, or XML)
• Many-to-Many relationships are simple(no built-in mechanism in CSV, or XML, complicated in RDBMS)
• Mixing data from several places is simple(no built-in mechanism in CSV, XML or RDBMS)
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Properties of Linked Data
• Repeated values are simple(hard in CSV, simple in XML)
• Removing duplication is simple(no mechanism in CSV, or XML)
• Many-to-Many relationships are simple(no built-in mechanism in CSV, or XML, complicated in RDBMS)
• Mixing data from several places is simple(no built-in mechanism in CSV, XML or RDBMS)
• Data Structure is self-describing(CSV needs you to know the structure, XML has limited support)
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Licensing...
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Licensing...
• Data is not a Creative Work
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Licensing...
• Data is not a Creative Work
• Copyright does not apply (consistently)
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Licensing...
• Data is not a Creative Work
• Copyright does not apply (consistently)
• Creative Commons is a Copyright-based license
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Licensing...
• Data is not a Creative Work
• Copyright does not apply (consistently)
• Creative Commons is a Copyright-based license
• Therefore...
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Licensing...
• Data is not a Creative Work
• Copyright does not apply (consistently)
• Creative Commons is a Copyright-based license
• Therefore...
• Creative Commons does not apply to data...
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Licensing...
• Data is not a Creative Work
• Copyright does not apply (consistently)
• Creative Commons is a Copyright-based license
• Therefore...
• Creative Commons does not apply to data...
• Use CC0 or ODC PDDL or ODC ODbL (for share-alike)
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but more... Think in terms of webs of things, not hierarchies,
site maps or user journeys.
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still more... An internet of things
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Key Points !
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Key Points !
• Linked Data, RDF, is the HTML for data.(it’s 1995 all over again)
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Key Points !
• Linked Data, RDF, is the HTML for data.(it’s 1995 all over again)
• Linked Data, web-thinking, is as old as the Library of Alexandria(and like Alexandria, it is a great way to share knowledge)
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Key Points !
• Linked Data, RDF, is the HTML for data.(it’s 1995 all over again)
• Linked Data, web-thinking, is as old as the Library of Alexandria(and like Alexandria, it is a great way to share knowledge)
• Linked Data makes data part of the web.(a first class citizen alongside HTML, a target for linking to)
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Key Points !
• Linked Data, RDF, is the HTML for data.(it’s 1995 all over again)
• Linked Data, web-thinking, is as old as the Library of Alexandria(and like Alexandria, it is a great way to share knowledge)
• Linked Data makes data part of the web.(a first class citizen alongside HTML, a target for linking to)
• Linked Data lets anyone say anything about anything.(so don’t trust everything you read...)
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