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![Page 1: The OpenURL Framework for the Context- sensitive Provision of Service Links Herbert Van de Sompel Cornell University -- Computer Science Emory University.](https://reader035.fdocuments.us/reader035/viewer/2022081514/56649f445503460f94c64bd6/html5/thumbnails/1.jpg)
The OpenURL Framework for the Context-sensitive Provision of Service Links
Herbert Van de SompelCornell University -- Computer Science
Emory University – June 11th 2001
![Page 2: The OpenURL Framework for the Context- sensitive Provision of Service Links Herbert Van de Sompel Cornell University -- Computer Science Emory University.](https://reader035.fdocuments.us/reader035/viewer/2022081514/56649f445503460f94c64bd6/html5/thumbnails/2.jpg)
Problem statement
• context: web-based scholalry information environment• concepts:
• reference links / extended service links• closed and non-context sensitive linking frameworks
herbert van de sompel
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OPAC
web-based scholarly information
FTXT
FTXTe-printA&I
A&I
distributed
herbert van de sompel
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OPAC
web-based scholarly information
FTXT
FTXTe-printA&I
A&I
range of authorities, technologies
herbert van de sompel
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OPAC
web-based scholarly information
FTXT
FTXTe-printA&I
A&I
¡¡ challenges re integrated access !!
herbert van de sompel
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OPAC
linking
FTXT
FTXTe-printA&I
A&I
interlink related information
herbert van de sompel
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reference links
extended services
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full text
reference links
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full text
reference links
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full text
Ulrich’s
citation databases
extended services
Medline
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Who is Who
Books in Print
Amazon.com
extended services
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linking frameworks: problems
not context-sensitive
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appropriate
full text
Inspec
citation databases
contextualize extended services
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linking frameworks: problems
not context-sensitive
limited scope • business agreements• type of extended services
closed • do not allow for compensation of the problems
herbert van de sompel
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A solution: the OpenURL framework
• concepts:
• disconnecting metadata from services
• introduce overlaying service components
• the OpenURL as an interoperability specification
• the OpenURL
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metadata planeresource1
resource2 resource3
default links
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metadata plane
extended services plane
resource1
servicecomponent1
servicecomponent2
default links
appropriate links
Ope
nURL
resource2 resource3
herbert van de sompel
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the OpenURL framework
FTXT
FTXT
A&I
localservice
component
OpenURL
OpenURLO
penU
RL O
penUR
L
• by value or by reference delivery of metadata on users’ request
• linking server • describes context
herbert van de sompel
OPAC
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):-search
resultOpenURL
otherdbase
fetch metadata
)
the OpenURL framework
A&I
localservice
component
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OpenURL example
service component http://sfx.aaa.edu/menu
AU Smith, Paul ISSN 1234-5678VOLUME 12ISSUE 3PAGES 1-8PY 1998DBASE ERL-BIOSISDBASE-AN 987641
record in A&I
herbert van de sompel
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OpenURL example
http://sfx.aaa.edu/menu?genre=article&issn=1234-5678&volume=12&issue=3&spage=1&epage=8&date=1998&aulast=Smith&aufirst=Paul
OpenURL
http://sfx.aaa.edu/menu?mpt=http://erl.rug.ac.be/gate?db=biosis&id=987641
OpenURL
herbert van de sompel
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An open issue in the OpenURL framework
• matching a user with a service component
• pragmatic solutions
• user profiles
• cookiepusher
• IP-address based
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Deployment of OpenURL framework
• draft OpenURL specs early 2000
• lots of interest from libraries, information providers
• adopted by important information providers
• OpenURL fast track NISO standardization 2001
• SFX server marketed by Ex Libris
• DOI/CrossRef prototype: integration with OpenURL
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Alternative resolution of identifiers & OpenURL framework
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proxy handle url
herbert van de sompel
doi link
user clicks
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OpenURL
aware
proxy handle
doi
metadata
herbert van de sompel
doi link
user clicks
servicesuser gets
localservice
component
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What’s next: alternative resolution of descriptors
Extend the OpenURL framework:
• from scholarly information objects to entities in general
• from scholarly subsection of the Web to the Web
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demo? questions?
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• notion of resolution system really only exists for an identifier/name
• OpenURL framework: • can ask for services using both metadata and identifiers as input to the service component• this can be regarded as the resolution of metadata and identifiers into services
what’s next?
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• extend identifier to descriptor
• descriptor describes an entity by means of:• identifiers of the entity• identifiers of metadata of the entity• metadata for the entity• pointers to metadata for the entity
• open linking: resolve descriptors into services via service components
what’s next?
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• more information is required than only the descriptor of the entity for which one wants services
• ContextObject contains descriptors for:• entity for which services are required• refering entity • refering resource• requestor of services• service component - resolver
what’s next?
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1. implement a technique to make a resource understand the difference between a user that has access to a service component and one that does not
OpenURL-awareness
herbert van de sompel
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1. CookiePusher, user-profiles, DLF certificate, ...
OpenURL-awareness
herbert van de sompel
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2. for users with access to a service component, provide an OpenURL for each transported metadata-object
OpenURL-awareness
herbert van de sompel
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2. OpenURL:target = service componentcontent = elements of the metadata, in a public syntax
OpenURL-awareness
http://www.sfxit.com/OpenURL
herbert van de sompel
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link = http://dx.doi.org/10.1000/6382-1
OpenURL examples
OpenURL =http://sfx.aaa.edu/menu?id=doi:10.1000/6382-1
service component = http://sfx.aaa.edu/menu
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OpenURL status
OpenURL => NISO
herbert van de sompel
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Firm commitment to OpenURL
• EBSCO.
• ISI. Web of Science v4.03 due for release in Q4.
• Institue Of Physics Publishing. Available now.
• SilverPlatter (WebSPIRS 5 - 2001. A solution is available today)
• Los Alamos e-print ArXiv. Available now.
• SLAC/SPIRES (high-energy physics – Stanford). Available now.
OpenURL status
![Page 39: The OpenURL Framework for the Context- sensitive Provision of Service Links Herbert Van de Sompel Cornell University -- Computer Science Emory University.](https://reader035.fdocuments.us/reader035/viewer/2022081514/56649f445503460f94c64bd6/html5/thumbnails/39.jpg)
Partial commitment to OpenURL
a. Participation in SFX beta test: OCLC First Search & Ovid
b. Other
• Cambridge Scientific Abstracts. Implementation soon.
• ProQuest/Bell+Howell. Plans to implement by end of 2000. Work is underway).
• DOI/CrossRef. Experiments (Includes 44 Primary Publishers).
OpenURL status
![Page 40: The OpenURL Framework for the Context- sensitive Provision of Service Links Herbert Van de Sompel Cornell University -- Computer Science Emory University.](https://reader035.fdocuments.us/reader035/viewer/2022081514/56649f445503460f94c64bd6/html5/thumbnails/40.jpg)
OpenURL implementation under discussion
• Gale Group
• InfoTrieve
• RoweCom
• Swets
• NorthernLight
• Ingenta
OpenURL status
![Page 41: The OpenURL Framework for the Context- sensitive Provision of Service Links Herbert Van de Sompel Cornell University -- Computer Science Emory University.](https://reader035.fdocuments.us/reader035/viewer/2022081514/56649f445503460f94c64bd6/html5/thumbnails/41.jpg)
Part 2: specific
the delivery of localized extended services
• the SFX software
herbert van de sompel
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OPAC
the SFX server
FTXT
FTXT
A&I
OpenURL
OpenURLO
penU
RL O
penUR
L
• one of many possible service components• currently in beta
herbert van de sompel
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1. accept OpenURL as input
the SFX server
![Page 44: The OpenURL Framework for the Context- sensitive Provision of Service Links Herbert Van de Sompel Cornell University -- Computer Science Emory University.](https://reader035.fdocuments.us/reader035/viewer/2022081514/56649f445503460f94c64bd6/html5/thumbnails/44.jpg)
2. collect object-metadata: • from the OpenURL [OpenURL parser]• via fetch from a resource [SourceParsers]:
• per sid & per namespace• http, z39.50, OAI interface, ... fetch• parsing of reply• configuration via table
the SFX server
![Page 45: The OpenURL Framework for the Context- sensitive Provision of Service Links Herbert Van de Sompel Cornell University -- Computer Science Emory University.](https://reader035.fdocuments.us/reader035/viewer/2022081514/56649f445503460f94c64bd6/html5/thumbnails/45.jpg)
3. augment object-metadata
the SFX server
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the SFX server
4. compute relevant localized extended services [SFX database]
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definition of potential services
information about the local collection
rules supporting a decision on the relevance of services
SFX database
![Page 48: The OpenURL Framework for the Context- sensitive Provision of Service Links Herbert Van de Sompel Cornell University -- Computer Science Emory University.](https://reader035.fdocuments.us/reader035/viewer/2022081514/56649f445503460f94c64bd6/html5/thumbnails/48.jpg)
BIOSISarXivAPS/PROLAInspecCompendex
SOURCES
MedlineInspecSpringerSci Cit BasOPAC
TARGETS
get_holdingsget_abstractget_full_textcited_author
SERVICES
OBJECTS
1234-56783456-87659876-43212389-6734
THRESHOLDS
![Page 49: The OpenURL Framework for the Context- sensitive Provision of Service Links Herbert Van de Sompel Cornell University -- Computer Science Emory University.](https://reader035.fdocuments.us/reader035/viewer/2022081514/56649f445503460f94c64bd6/html5/thumbnails/49.jpg)
TARGETS
MEDLINE requests:getFullTxtgetTOCgetAuthorgetCitedAuthorgetAbstractgetWebServicegetCitedReferencegetCitedJournal
Springer provides: getFullTxt, getTOC
BIOSIS provides:getAuthor, getAbstract
Wiley provides:getFullTxt, getTOC
WWW Search Engines provides:
getWebService
Web of Science provides:getCitedReference
getCitedAuthorgetAuthor
SOURCES
conceptual links that will be formed
(for real)if certain
requirements (Thresholds)
are met …
COLLI
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the SFX server
5. compute service-links [TargetParsers]
• Per Target/Service
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tools for SFX-configuration
• SFXCTRL: • a graphical interface for configuring:
• Sources• Targets • Services [where Sources and Targets meet]
• and for making small-scale edits to the SFX-base• TEMPLATES: basic, generic, flexible pre-configurations• SFXLOADER: a tool for object administration• STATISTICAL measures
![Page 52: The OpenURL Framework for the Context- sensitive Provision of Service Links Herbert Van de Sompel Cornell University -- Computer Science Emory University.](https://reader035.fdocuments.us/reader035/viewer/2022081514/56649f445503460f94c64bd6/html5/thumbnails/52.jpg)
Sources
• Where a user is coming from, beginning a search• Examples:
• OPAC• A&I database• Online journal
• Sources must be OpenURL-enabled!
Librarian must decide what Sources are available in the library environment and what Services would be desired by users.
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Targets & Target/Services
• Where a user “lands”• Services are the facilities:
• A getAuthor service would run a search in a target on an author’s name
• A getFullTxt service would link to the full text of a particular article from a Target publisher
• Targets must have a link-to syntax that supports the Service
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Threshold administration
• Thresholds aid in the process of evaluating the appropriateness of delivering a real link based on a conceptual link:• Objects: ISSN numbers in an A&I database• Rules: metadata needs an ISBN number
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Templates
• Material to support typical or generic scenarios• Contain: services, parsers, objects and thresholds• Constantly updated and distributed by Ex Libris• Subscribing library “localizes” to match library’s
subscriptions and conditions
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http://www.sfxit.com ; brochures in back
demos
http://www.sfxit.com/OpenURL
http://sfxserv.rug.ac.be:8888/public/xref/DOI experiment
http://www.sfxit.com/sources.htmlSources
http://www.sfxit.com/targets.htmlTargets
http://www.dlib.orgreading
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CrossRef
DOI - CrossRef - OpenURL – SFX experiment
http://sfxserv.rug.ac.be:8888/public/xref/