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Networked Information Resources

Networked Information Resources. Federated search, link server, e-books. Federated search. Enable users to search a multiple of independent, discretely mounted databases through one search query. Federated search. Distributed approach: NISO Z39.50 protocol (catalog search across libraries)

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Networked Information Resources

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  1. Networked Information Resources Federated search, link server, e-books

  2. Federated search • Enable users to search a multiple of independent, discretely mounted databases through one search query.

  3. Federated search • Distributed approach: NISO Z39.50 protocol (catalog search across libraries) Meta-search engines • Centralized approach: Google scholar (through DOI-CrossRef framework) Metadata harvesting (Open Archive Initiative)

  4. The “appropriate copy” problem • “Having discovered a information source, how is the user provided with access to the most appropriate copy, given user and institutional preferences, access rights, cost etc.?”

  5. Intermediary between user and source • Source (e.g. a journal article, e-book) • Target (users with different privileges) • Service (link-resolvers such as OpenURL resolver and CrossRef)

  6. OpenRUL Resolver (link server) • Also referred to as the user’s Institutional Service Component (ISC) • The link server stores the preference information and the links to the appropriate materials

  7. Added value • Solve the “appropriate copy” problem • Allow other library services such as ILL (interlibrary loan), document delivery… • Online equivalent of a reference desk

  8. OpenURL protocol • URL, open and fixed • The internet equivalent of index card • Encode the metadata of a publication in URL • The resolver decides the appropriate copy based on the metadata encoded in the OpenRUL • OpenURL article

  9. OpenURL • A protocol for interoperability between an information resource and a service component (link resolver) • Provides a mechanism for encoding a citation for an information resource, typically a bibliographic resources, as an URL.

  10. OpenURL sample http://scholarsfx.exlibrisgroup.com:3210/scholarsfx886ss002?sid=google&auinit=M&aulast=Huang&atitle=The+influence+of+document+presentation+order+and+number+of+documents+judged+on+users%27+judgments+of+relevance&id=doi:10.1002/asi.20047

  11. CrossRef • A linking system developed by a consortium of leading journal publishers. • Make it easy to identify and link to journal articles provides by publishers • Based on DOI (Digital Object Identifier) protocol

  12. Digital Object Identifier (DOI) • An open standard for creating an alphanumeric name that identifies digital content, mostly scholarly contents such a e-book or journal article. • A DOI is a unique ID number for a document • is paired with the object’s electronic address, or URL (updatable), along with other metadata • DOI resolver

  13. Locators in networked environment • URL (Uniform Resource Locators) Non-persistent locator without metadata • DOI (Digital Objective Identifier) persistent identifier for “any object of intellectual property” “the bar code for intellectual property”

  14. From (Sompel and Beit-Arie, 2001) DLib

  15. From (Sompel and Beit-Arie, 2001) DLib

  16. E-books • Amazon: “Search inside the Book”, “Amazon Pages” “Amazon Upgrade” • Google books search • Project Gutenberg • Open Content Alliance • E-books in library

  17. Digitalization and remote access • Multiple concurrent access • Digital right management • New business models

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