why libraries will care how linking works
DESCRIPTION
WHY LIBRARIES WILL CARE HOW LINKING WORKS. November, 2000. WHAT WE ALL WANT TO ACCOMPLISH. Any old system. Citation. Citation. LINK. CLICK. LINK. MAGIC. Cited Article. HOW DOI PERFORMS “MAGIC”. Any old system. Step 1. Citation. Search response. DOI. CLICK. Step 2. DOI. - PowerPoint PPT PresentationTRANSCRIPT
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WHY LIBRARIES WILL CARE HOW
LINKING WORKS...
November, 2000
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Citation LINK
MAGICLINK
Cited Article
Citation
WHAT WE ALL WANT TO ACCOMPLISH
CLICK
Any old system
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Any old system
CitationDOI
Step1
Step2 DOI Resolver
DOI
URL
Cited article
Search response
RepositoryURL
Article
Step3
HOW DOI PERFORMS “MAGIC”
CLICK
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BUT -- WHAT IF MORE THAN 1 COPY EXISTS?
• Elsevier journals, for example, are on-line at:– Elsevier ScienceDirect– OhioLink– University of Toronto
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WHICH URL?
HandleServer
DOI
URL?
Sciencedirect.com?
Ohiolink.edu?
Utoronto.ca?
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A PROBLEM
DOI today cannot resolve to more than 1 copy
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ACM
DOI (to Elsevier)
Ohio State User
ELSEVIER
Cited article
OhioLink
A BAD THING….
(or: “$25, please”)
CLICK
ARTICLECitation
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WHY MULTIPLE COPIES
• “Local loading”– A number of institutions are already loading e-
journals for their local populations• OhioLink, Toronto, University of Illinois...
– As local digital library infrastructures (and archiving projects??) grow, this may become more common
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WHY MULTIPLE COPIES
• Aggregators– Most electronic journal access in many
institutions today is through aggregators• OCLC EJO, EBSCO, Ovid, IAC, Bell & Howell
– Smaller publishers, publishers outside of STM, and smaller libraries rely much more on aggregators than direct access through publisher sites
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WHY MULTIPLE COPIES
• Mirror sites– Common for reasons of performance,
redundancy, and telecommunications costs– Which mirror (address) you should use can
depend on “where” you are on the net– Some publishers now negotiating for
institutions to mount mirror systems for archiving (eg., APS mirrors at Cornell and Library of Congress)
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WHY MULTIPLE COPIES
• E-print servers– A lot of current interest in building subject-
specific e-print collections (which include published articles)
• LANL, PubMedCentral, CDL, Cornell...
– And some interest in institution-specific services (D-Space at MIT)
– Relationship to formal publications certain to be complex and overlapping
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WHY MULTIPLE COPIES
• Preservation archives– Institutional failure is as great a danger as
technological failure • Multiple copies held by different parties is the best
protection
– May be no linkage problem if the archive is “dark”, but…
• How “safe” are unused copies?
• Much current discussion of “dim” (low functionality) full service archives for local use
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THE APPROPRIATE COPY
• When more than 1 copy exists, specific populations frequently have the right to access specific copies– Some systems today can do this tailored
linking (ISI, for instance)– But... it must be done by EVERY system from
which links can come• Can we expect every citation source to do this???
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LOCALIZATION (THE INSIGHT OF SFX)
• In a world of restricted access and complex business arrangements, what options a user is given and what information s/he is offered is frequently a local question
• SFX demonstrates there are any number of links that an institution might choose to offer a user from a given citation
• Appropriate electronic copy is only the most immediate issue….
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Paper is also a copy
• Electronic links are great, but users should also know there is local hard copy available
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Any old system
DOI (to Elsevier)
Harvard User
ELSEVIER
Search response
ANOTHER BAD THING….
(or: “$25, please”)
CLICK
but there is a free paper copy next door….
ARTICLECitation
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Proxy problem
• To provide access from off-campus, many libraries now provide proxy servers
• With most proxies, if you are not coming from a proxied resource, a link will not be proxied
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PubMed
DOI (to Elsevier)
Off-campus User
ELSEVIER
Local Proxy
Cited article
Search response
YET ANOTHER BAD THING….
(or: “$25, please”)
CLICK
ARTICLECitation
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DIGITAL LIBRARIES OF OLD
• Closed systems
• A designer at the top
• Predictable players and parts
• Control of both ends of a relationship
• Task was to build a system
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NOW WE KNOW
• Open, open, open
• No one designer -- evolves organically
• Unpredictable players and parts
• Nobody is in control
• Task is integration of independent parts
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WILL THE ENVIRONMENT BE CONSTRAINED?
• A generalized link-from-anywhere-to- anywhere solution will allow the e-journal environment to evolve naturally
• We are in a period of much necessary experimentation– Who are the players?– What are their roles?– How many options will users and libraries have?
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DOI INFRASTRUCTURE FEELSQUITE CONSTRAINING TODAY
(A HOT-LINKED DOI GOES ONLY 1 PLACE…)
BUT CHANGING THIS WILLNOT BE EASY!
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A CURIOUSITY (or, is something missing?)
The primary unit in the DOItechnical architecture is article
but….
the primary unit of business for journals is title + year
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SUMMARY
1. Multiple copies will exist, and if nothing is done we are going to have
a bit of a MESS!
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SUMMARY
2. Assuming a single point of resolution is too constraining at a time of rapid
evolution and massive uncertainty about roles and players!
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SUMMARY
3. The infrastructure must be built to support complexity, localization,and a
variety of heterogeneous services and solutions!
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CROSSREF/DLF LINKING PROTOTYPE
• Group of research libraries coordinated by DLF approached CrossRef on the “appropriate copy” issue
• Series of discussions between publishers, DOI, CrossRef, libraries, service providers, NISO ensued
• Prototype to test “localization” of linking over next 6+ months
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Any old system
CitationDOI
Step1
Step2 DOI Resolver
DOI
URL
Cited article
Search response
RepositoryURL
Article
Step3
REMEMBER HOW DOI PERFORMS “MAGIC”
CLICK
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Any old system
CitationDOI
Step1
Step2 DOI Resolver
DOI
Search response
PROTOTYPE ARCHETECTURE
CLICK
DOI SERVER:Does user havelocalization?
LOCALIZATIONSERVICE
(at library or service provider)
Y
N
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LOCALIZATION
• DOI resolution is optionally redirected to a server specific to a population
• Localization server decides what response a user should get for this DOI– Refer to electronic copy from publisher or alternate service
(local, aggregator, etc.)
– Information about paper copy in collection
– etc., etc.
• Resolution is based on local collection and business arrangements