the potential of linked data stephen rhind-tutt, president singapore, august 2013
TRANSCRIPT
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The Potential of Linked Data
Stephen Rhind-Tutt, President
Singapore, August 2013
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Overview
• Some background• The landscape - challenges facing academic
publishing• What’s the role of (open) linking?• ASP’s experience of linking between databases• Inbound links• Outbound links• Are we moving fast enough?• Where will it end?• If we have enough time…a couple of exciting
projects
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Some background
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• 13 years old• 100+ people• Based in Alexandria, Virginia• Offices in the UK, ANZ, Kuala Lumpur, Shanghai• ‘Born digital’ publisher• Improve access and utility for learning and research
Alexander Street Press
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Make silent voices heard
Our Purpose
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Some of our publications
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The Landscape….challenges facing us
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By 2020 the web will contain…?
• 90% of published works prior to 1923
• Majority of works published to 2020
• > 100 billion pages of e-mail, phone logs, databases, blogs, and Web sites (currently 45 billion)
• > 1 Trillion Photos (As of 1/13 Facebook had 240 Bn photos. 1.1 Bn uploaded over New Years alone)
• > 100 million facsimile pages of manuscripts
• > 30 million published audio files
• > 2.4 Bn video files on YouTube (1 Bn unique users per month)
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Exponentially more use…
• >1 billion unique users monthly• >4 billion hours watched monthly• 72 hours of video are uploaded every minute• 70% of YouTube traffic comes from outside the US• In 2011, YouTube had more than 1 trillion views or
around 140 views for every person on Earth
http://www.youtube.com/yt/press/statistics.html 4/3/2013
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What does this have to do with academic publishing?
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Watch out…
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We are going to need bigger boats
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What happens when?
• (Almost) all content is machine readable • (Almost) everyone can access it instantly• (Almost) everyone uses it
• Machines must help us learn, discover, understand
• Search• Publish• Analyze• Process data• Identify patterns• Draw conclusions• Etc…• To do e-science, e-humanities,
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Evolution of publisher tasks
Fading Growing
Typesetting Printing
Print monograph Print directory
Public domain reprintsSimple, one database search
Rare and unpublished material
Linking
Licensing
Free materials
Semantic indexing
Process integration
Unified search software
Workflow tools
Warehousing
Community buildingAsset management
Commissioning
Editorial
QualitySelection
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What role does (open) linking have to play?
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It’s the next hurdle
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It’s the nature of the Web
• Atomic• Interconnected • Interdependent• Value of the Connection = Value of the object
• Pliable• Constantly evolving• Practically unlimited in size
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• Speeds research and learning• Fewer interfaces to learn and navigate• Reduces duplication• Increases comprehensiveness• Allow unified annotation and
• Lowers costs• Libraries don’t purchase same content twice• Publishers don’t need to license and re-sell ubiquitous content• Obviates need for updates
• Maximizes usage• Content can be part of every search
• Increases functionality• Allows machine manipulation of data• Linkages not just between content but between apps
Linking
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It’s the future of academic publishing…
• We seek knowledge and learning, not journals, books and publishers
• Publishers need to deliver the right content, in the right way to the right people.
• In a network a node is less important than the links between the nodes. No one site will have all information
• We need actionable, high quality access to content across different publishers, libraries and websites.
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Where we’re headed
After Data, Information, Knowledge, and Wisdom, Gene Bellinger, Durval Castro, Anthony Mills. http://www.systems-thinking.org/
Who, What, When, Where?
Therefore
Why?
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ASP experience in linking
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Building The American Civil War Online
How to build links between lots of relevant but different files?
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100,000+ pages, including previously unpublished manuscripts
Began with…
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Analyzed what’s studied in the “real” world
Book
Author
Captain
Navy
SongBattle
Battlefield Rank
Article
SkirmishLocation
Company
General
Casualty
Memoir
Letter
Gun
Promotion
Army
Diary
Acts
Date
Event
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Built a structure to capture it…
Battle Author Event Source
Where ?When ?Who ?DeathsLeadersEtc…
Birth ?Death ?Where ?When ?OccupationEtc…
DayEventEtc…
SourceEditorPublisherPlaceEtc…
DocumentBattle IDAuthor IDEvent IDSource IDDateSubjectAge writing
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Launched theCivil War Research Database
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American Civil War Research Database
Illustrated Civil War Newspapers
User wants to cross search and cross link
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SubjectEntity
Make the system understand how things are connected
Resource Description Framework (RDF)
Charles W. Johnson
Battle of Manassas
Fought in
ObjectEntity
Predicate (Property)
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Reconcile the semantic entities
Civil War Research Database5,441 ‘battles’
• Includes skirmishes, naval encounters
Individual details
July 21st - Bull Run
US National Park Service Database
• 382 ‘battles’ • Land based only
Major developments
No individual details
July 21st – Manassas
What is a battle?When does a battle begin?Where is a battle actually fought?Inference issues: if Johnson was in the 124th regiment and the 124th fought at Bull Run can we assume he fought at Bull Run?Etc….
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Place (geocodes) and Date are• Universal• Authoritative• Comprehensive • Standardizable
Other vocabularies not so straightforward• UMLS unifies over 150 medical subjects such as ICD-10,
MeSH, SNOMED CT, DSM-IV and more• Requires Continuous error correction, updating and
improvements.
Entity matching isn’t easy…
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Add lots more dbs and content
How to build links between lots of relevant but different files?
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- Machine aided indexing tags subjects, names, places- Struggles with relationships- Work has been going on since the 1990’s- Some success, but most had to be done manually
Automated entity/property extraction?
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Make relationships linkable (in process)
Is a photo of
Sung this songWrote
Is mentioned inEnlisted in
Died in
Fought Under
Died on
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Music
NewspapersWebsites
Monographs
Primary Works
Journals
90 databases25,000 video titles>1m tracks of music>5m pages of text1.2m digital objects
Goal: Inbound and outbound links to all
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Steps to integration
The American Civil War Letters and Diaries
The American Civil War Online
All Alexander Street Content
All linkable content
Not to scale ;)
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• Unified, multi-database, multi-discipline cross-search• Preserving and opening controlled vocabularies • Single Open API for third-party access• Launched in July 2013
Start with all ASP content on one platform…
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Inbound linking
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Mobile
Embeds
DiscoveryServices
MARC
Inbound links
SearchEngines
RDF ?
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Philosophical issues• Many don’t want to link to ‘for fee’ objects• Charge for traffic generated or to generate traffic?• Building links is expensive. Who pays?• When things change who’s responsible?• Vested interests
Technical• Authentication• Permissions• Automated tools lacking
Challenges to building semantic links
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If the data isn’t there
Not that useful
UnhappyStudents…
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If the data is there…
‘Churchill’ ‘Mozart’ ‘Child Therapy’
3 search examples keyed into one box…
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If the data’s there and the usage is there…
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Outbound links
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• Higher value links• Semantic indexing and keyword
searching of more than 3,000 oral history collections
• Represents the personal histories of some 300,000 people
• Value:– Context– Selection– Search power– Licensed material– Integration
Experience so far Oral History Online
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Browsing value…
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Search Power
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Context for results
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Done by linking alone
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Rather than… Do the following…
• Have permanent links• Invite others to link to you• Exchange links in batch
through protocols like OpenURIs/URLs
• Make citations visible to the outside world
• If necessary charge for links/crawlers/APIs
• Engineer for multiple interfaces• Ask others (e.g. Google) to do
the same!
Challenge - Linking behaviors
• Change links constantly
• Forbid others to link to you
• Refuse to license for crawlers
• Insist on one interface
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• ‘We want full-text content, not indexes’• ‘Why should we pay for content that’s free?’• ‘It’s not our job to index content we don’t own’• ‘Should it be in the OPAC?’• Not sure what to do about MARC records…
• Metrics and development funds prioritized towards 1. Content (look what we own) 2. Usage (look how much it’s being used) 3. Utility (look how much is learned/discovered)
Challenge - Library Perceptions
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• Who pays for the links?• Connections don’t lend themselves to advertising• Utility is largely in the background• OCLC aside, discovery services don’t pay for metadata
• Permissions control is complex• Authentication • Determining ownership before providing access
• Competitive forces • Major players (e.g. Google) won’t allow data mining• Discovery services
Business Issues
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Room for improvement?
Feature ASP Discovery Service
Quality content Y Y N
Discipline relevance: comprehensive, covers rare, small sites
Y N N
Stability: automated re-directs and indicators of broken links
Y Some Some
Integration – playlist integration, easy citation, annotation.
Y Some Some
Usage statistics Y Y N
Broken link user alerting Y ? NDeep integration of selected items – semantic indexing Y N N
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Adding discovery to Academic Video Online
Source # of Titles What is it? LevelC-Span 400,000 News broadcasts since 1983. Cross-searchedTED Talks 700 Unique lectures Cross-searchedWGBH Open Vault 1,025 Interviews with famous people Title by titleAnnenberg Media 300 Scientific Videos Title by titleScience Cinema 250 Experimental Videos Title by titleCivil Rights Movement 125 Oral Histories Title by title
Total 50 Sites, over 500k titles
Target Sites for Connectors
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Are publishers and librarians making progress quickly enough?
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Some great sites…
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Too many Mash-ups to mention…
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Growing number of targets…
http://lod-cloud.net/state
Distribution of links by domain
Distribution of triples by domain
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Freebase – entity definitions
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Knowledge GraphSearch for Singapore…
Google:– 715 million hits
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Discovery
Semantic Web
Meaning based search
Inference ‘knowledge’
Automated Data interactions/Mash-ups
Progress could be faster…
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• Ted Nelson outlined Hypertext in 1963.
• Berners-Lee wrote/published on a Hypertext project - The World Wide Web - in 1989/1990.
• In 1999 Ted Nelson opined
“HTML is precisely what we were trying to PREVENT— ever-breaking links, links going outward only, quotes you can't follow to their origins, no version management, no rights management”
Goes slower than you think…
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Where we’re headed
After Data, Information, Knowledge, and Wisdom, Gene Bellinger, Durval
Castro, Anthony Mills. http://www.systems-thinking.org/
Who, What, When, Where?
Therefore
Why?
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www.alexanderstreet.com
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Nano-publication…
New ideas…
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Nano-publication…
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• Equations, tables and graphs interactive so reviewers, readers and machines can check, manipulate and explore the result space
• Long term technical compatibility • Data and code validated easily and automatically• Balances author rights, institutional rights, and open access.• Registration and tracking of actions for provenance• Viruses and code contamination, plagiarism proof• Open API to enable automated queries by outsiders
Elsevier’s Executable Article Challenge
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Search Tool
Sequences alignment editor
3D Structure Tool
PRECIS results with citations
Utopia Suite – selected tools