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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.

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Why libraries will care how linking works

WHY LIBRARIES WILL CARE HOW LINKING WORKS...

November, 2000


What we all want to accomplish
WHAT WE ALL WANT TO ACCOMPLISH

Any old system

Citation

Citation

LINK

CLICK

LINK

MAGIC

Cited Article


How doi performs magic
HOW DOI PERFORMS “MAGIC”

Any old system

Step

1

Citation

Search response

DOI

CLICK

Step

2

DOI

DOI Resolver

URL

Repository

URL

Step

3

Cited article

Article


But what if more than 1 copy exists
BUT -- WHAT IF MORE THAN 1 COPY EXISTS?

  • Elsevier journals, for example, are on-line at:

    • Elsevier ScienceDirect

    • OhioLink

    • University of Toronto


Which url
WHICH URL?

DOI

Handle

Server

URL?

Sciencedirect.com?

Ohiolink.edu?

Utoronto.ca?


A problem
A PROBLEM

DOI today cannot resolve

to more than 1 copy


A bad thing
A BAD THING….

Ohio State User

ACM

ARTICLE

Citation

DOI (to Elsevier)

CLICK

ELSEVIER

(or: “$25, please”)

OhioLink

Cited article


Why multiple copies
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


Why multiple copies1
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


Why multiple copies2
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)


Why multiple copies3
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


Why multiple copies4
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


The appropriate copy
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???


Localization the insight of sfx
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….


Paper is also a copy
Paper is also a copy

  • Electronic links are great, but users should also know there is local hard copy available


Another bad thing
ANOTHER BAD THING….

Harvard User

Any old system

ARTICLE

Search response

Citation

DOI (to Elsevier)

CLICK

ELSEVIER

(or: “$25, please”)

but there is a free paper copy next door….


Proxy problem
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


Yet another bad thing
YET ANOTHER BAD THING….

Off-campus User

PubMed

ARTICLE

Search response

Citation

DOI (to Elsevier)

CLICK

ELSEVIER

Cited article

(or: “$25, please”)

Local

Proxy


Digital libraries of old
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


Now we know
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


Will the environment be constrained
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?


DOI INFRASTRUCTURE FEELS

QUITE CONSTRAINING TODAY

(A HOT-LINKED DOI GOES

ONLY 1 PLACE…)

BUT CHANGING THIS WILL

NOT BE EASY!


A curiousity or is something missing
A CURIOUSITY (or, is something missing?)

The primary unit in the DOI

technical architecture is article

but….

the primary unit of business for

journals is title + year


Summary
SUMMARY

1. Multiple copies will exist, and if

nothing is done we are going to have

a bit of a MESS!


Summary1
SUMMARY

2. Assuming a single point of resolution

is too constraining at a time of rapid

evolution and massive uncertainty

about roles and players!


Summary2
SUMMARY

3. The infrastructure must be built to

support complexity, localization,and a

variety of heterogeneous services

and solutions!


Crossref dlf linking prototype
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


Remember how doi performs magic
REMEMBER HOW DOI PERFORMS “MAGIC”

Any old system

Step

1

Citation

Search response

DOI

CLICK

Step

2

DOI

DOI Resolver

URL

Repository

URL

Step

3

Cited article

Article


Prototype archetecture
PROTOTYPE ARCHETECTURE

Any old system

Step

1

Citation

Search response

DOI

CLICK

Step

2

DOI

DOI SERVER:

Does user have

localization?

N

DOI Resolver

Y

LOCALIZATION

SERVICE

(at library or service provider)


Localization
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


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