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OpenURL: Linking LC’s E-Resources Ardie Bausenbach Automated Planning and Liaison Office Library of Congress November 24, 2003.

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Presentation on theme: "OpenURL: Linking LC’s E-Resources Ardie Bausenbach Automated Planning and Liaison Office Library of Congress November 24, 2003."— Presentation transcript:

1 OpenURL: Linking LC’s E-Resources Ardie Bausenbach Automated Planning and Liaison Office Library of Congress November 24, 2003

2 The Linking Problem LC acquires e-resources from many sources – aggregator services, memberships, free services Some services link LC users directly from citations to full-text. Others offer predefined links to selective resources. Many services only offer tables of contents or citations. To find full text, users must search LC’s OPAC or A-Z lists to determine whether LC has access to the e-journal title with appropriate coverage dates.

3 LC’s A-Z lists LC’s A-Z lists Free websites Free websites Subject gateways Subject gateways A&I services A&I services Full text DBs Full text DBs Linking environment is inconsistent between resources and hard to manage. TOC & abstracts TOC & abstracts Predefined links are managed individually for each service, and bilaterally between services LC receives two A-Z lists: from TDNet and from Serials Solutions Predefined links do not allow consistent linking across services for different user groups, such as public and staff Publisher sites Publisher sites LC OPAC LC OPAC

4 TOC & abstracts TOC & abstracts LC’s A-Z Lists LC’s A-Z Lists Free websites Free websites Subject gateways Subject gateways LC OPAC LC OPAC A&I services A&I services Publisher sites Publisher sites Full text DBs Full text DBs An OpenURL resolver offers consistent links to services LC selects for specific user groups OpenURL Resolver

5 A&I Service (HLAS) as Link Source Link Source Services Menu Target Content Provider

6 OpenURL: How Does It Work? Service Provider makes source OpenURL-enabled OpenURL link is now available to users http://sfx.princeton.edu:9003/ sfx_pul?sid=LC: HLAS&genre=article&issn=0003-1615&title=Americas%3a +A+Quarterly+Review+of+Inter-American+Cultural+ History&volume=58&issue=2&pages=261-283&date= 2001&aulast=Kapelusz-Poppi&atitle=Rural+health+and+ state+construction+in+post-revolutionary+Mexico%3a OpenURL Resolver Source uses an OpenURL to send citation metadata and context information to resolver User clicks OpenURL link Author: Kapelusz-Poppi, Anna María Title: Rural health and state construction in post-revolutionary Mexico Journal: The Americas ISSN: 0003-1615 Date: 2001 Volume: 58 Issue: 2 Page: 261 Services Menu Presented to Users LC’s resolver determines what copy of full text LC users can access Free websites Free websites Full text DBs Full text DBs LC OPAC LC OPAC TOC & abstracts TOC & abstracts LC’s A-Z Lists LC’s A-Z Lists Google search Google search A&I services A&I services Article

7 What is an OpenURL? Transports metadata and/or unique identifiers for a requested resource, along with context information about the requestor, using a standard syntax. OpenURL (currently version 0.1) is in the process of becoming a NISO standard: OpenURL 1.0. Predetermines what metadata elements will be sent to the OpenURL resolver Relies at this time on the HTTP protocol for transmission. OpenURLs are “actionable URLs.”

8 An OpenURL contains: The address of the OpenURL resolver to which the OpenURL is going to be sent Sufficient information about the requested resource to allow the OpenURL resolver to match the metadata in the OpenURL to web services selected by the Library What is an OpenURL?

9 OpenURL 0.1 Article metadata is tagged using a predetermined element set. HTTP Transport Address genre=article& title=Americas%3a+A+Quarterly+Review+of +Inter-American+Cultural+History& issn=0003-1615& date=2001& volume=58& issue=2& pages=261-283& aulast=Kapelusz-Poppi& atitle=Rural+health+and+state+construction +in+post-revolutionary+Mexico%3a& sid=LC:HLAS genre=article& title=Americas%3a+A+Quarterly+Review+of +Inter-American+Cultural+History& issn=0003-1615& date=2001& volume=58& issue=2& pages=261-283& aulast=Kapelusz-Poppi& atitle=Rural+health+and+state+construction +in+post-revolutionary+Mexico%3a& sid=LC:HLAS genre=article& title=Americas%3a+A+Quarterly+Review+of+ Inter-American+Cultural+History& issn=0003-1615& date=2001& volume=58& issue=2& pages=261-283& aulast=Kapelusz-Poppi& atitle=Rural+health+and+state+construction+ in+post-revolutionary+Mexico%3a& sid=LC:HLAS genre=article& title=Americas%3a+A+Quarterly+Review+of+ Inter-American+Cultural+History& issn=0003-1615& date=2001& volume=58& issue=2& pages=261-283& aulast=Kapelusz-Poppi& atitle=Rural+health+and+state+construction+ in+post-revolutionary+Mexico%3a& sid=LC:HLAS Genre metadata is added from a fixed list of terms used in OpenURLs. http://resolver.loc.gov/loc.cgi? Add the address and the OpenURL is ready to be sent. Context-sensitive metadata about the source of the citation is added.

10 OpenURL 0.1 HTTP Transport Address genre=article& title=Americas%3a+A+Quarterly+Review+of +Inter-American+Cultural+History& issn=0003-1615& date=2001& volume=58& issue=2& pages=261-283& aulast=Kapelusz-Poppi& atitle=Rural+health+and+state+construction +in+post-revolutionary+Mexico%3a& sid=LC:HLAS genre=article& title=Americas%3a+A+Quarterly+Review+of +Inter-American+Cultural+History& issn=0003-1615& date=2001& volume=58& issue=2& pages=261-283& aulast=Kapelusz-Poppi& atitle=Rural+health+and+state+construction +in+post-revolutionary+Mexico%3a& sid=LC:HLAS genre=article& title=Americas%3a+A+Quarterly+Review+of+ Inter-American+Cultural+History& issn=0003-1615& date=2001& volume=58& issue=2& pages=261-283& aulast=Kapelusz-Poppi& atitle=Rural+health+and+state+construction+ in+post-revolutionary+Mexico%3a& sid=LC:HLAS genre=article& title=Americas%3a+A+Quarterly+Review+of+ Inter-American+Cultural+History& issn=0003-1615& date=2001& volume=58& issue=2& pages=261-283& aulast=Kapelusz-Poppi& atitle=Rural+health+and+state+construction+ in+post-revolutionary+Mexico%3a& sid=LC:HLAS OpenURL Resolver

11 What is an OpenURL Resolver? An OpenURL resolver is a server with software that: Processes OpenURLs coming from diverse OpenURL-aware sources Constructs outgoing requests for web services to diverse target content providers Builds services menus for LC user groups with “just-in-time” links to full text and other web services selected by LC

12 To successfully process incoming OpenURLs and generate outgoing requests to target service providers, a resolver must have: A robust knowledge database with metadata for sources, target content providers, the journal titles contained within targets, and web services Parsers and configuration files for: matching incoming OpenURLs to knowledge database metadata generating web service requests to target content providers at the appropriate level of granularity (article, journal issue, journal title, or service) What is an OpenURL Resolver?

13 Link Sources A&I databases TOC and Abstract databases Full text databases Electronic theses and dissertations E-journal article references in bibliographies and footnotes Web pathfinder links containing OpenURLs OPACs Every source must provide an OpenURL that can be sent to LC’s resolver

14 Target Content Providers Full Text E-journals OPAC searches for LC print holdings ILL/Document delivery Extended Services Citation databases Web search engines Internet bookstores OpenURL citation generators Ask a Librarian ….. LC chooses ! No standard exists. All targets must have a defined link-to or search syntax configured in the OpenURL resolver’s knowledge database

15 LC’s OpenURL Resolver Configuration will include: Deciding what OpenURL-aware sources and targets will be in the knowledge database Deciding what web services will be needed Building the technical infrastructure Maintenance will include: Updating the knowledge database metadata (vendor/LC) at least monthly, protecting LC’s local changes Reviewing workflow to add/update LC’s journal holdings in knowledge database Adding/updating web services offered to users

16 The New NISO Standard: OpenURL 1.0 OpenURL 0.1 Metadata values must be included in the OpenURL One fixed set of metadata tags and genres Limited contextual information about source HTTP transport OpenURL 1.0 Metadata values can be included in the OpenURL or can be pointed to Metadata tag sets and genres can be added More complete contextual information about source and desired types of service Transport not limited to HTTP

17 Challenges for OpenURLs Adoption of the NISO 1.0 standard in 2004 Improving data quality for incoming OpenURLs Cooperatively maintaining robust knowledge databases with accurate identifiers (ISSN/ISBN) and links to web services Cooperatively maintaining robust parsers and configuration files Authentication of user groups Exploration of OpenURL use with non-textual genres of e-resources Promotion of OpenURLs within scholarly information communities and beyond

18 For More Information about OpenURLs OpenURL Tutorial http://www.ariadne.ac.uk/issue28/resolver NISO Committee AX for OpenURL 1.0 http://library.caltech.edu/openurl/ LC’s OpenURL requirements (coming soon) http://lcweb.loc.gov/catdir/lcpaig Slide graphics adapted from: OpenURL and OpenURL Framework, Oliver Pesch, http://www.niso.org/standards/resources/PeschOpenURL.ppthttp://www.niso.org/standards/resources/PeschOpenURL.ppt

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