Networked Digital Library Of Theses And Dissertations


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Networked Digital Library Of Theses And Dissertations

  1. 1. Networked Digital Library of Theses and Dissertations By Sarah Inglish
  2. 2. Networked Digital Library of Theses and Dissertations (NDLTD) “ (NDLTD) is an international organization dedicated to promoting the adoption, creation, use, dissemination and preservation of electronic analogues to the traditional paper-based theses and dissertations.”
  3. 3. Purpose <ul><li>Allow students to produce electronic documents </li></ul><ul><li>Increase availability of student research </li></ul><ul><li>Electronic preservation </li></ul><ul><li>Lower cost of submitting and handling electronic theses and dissertations (ETD) </li></ul><ul><li>Empower student and universities </li></ul><ul><li>Advance digital library technology </li></ul>
  4. 4. Users and Users needs <ul><li>Users: </li></ul><ul><li>Graduate students and university libraries </li></ul><ul><li>Highly documented </li></ul><ul><ul><li>Software </li></ul></ul><ul><ul><li>Tech support </li></ul></ul><ul><ul><li>Listserve </li></ul></ul><ul><ul><li>NDLTD Committees </li></ul></ul><ul><li> </li></ul><ul><li>Users needs: </li></ul><ul><li>Sharing and aiding graduate student research </li></ul><ul><li>Support graduate students in submission of their own ETD </li></ul>
  5. 5. Collection <ul><li>767,186 documents </li></ul><ul><li>In over 50 languages </li></ul><ul><li>(English, Portuguese, German, French & Chinese) </li></ul><ul><li>From 18 countries (USA & Australia) </li></ul><ul><li>In 17 different file formats </li></ul><ul><li>(PDF, XML,, JPEG, QuickTime Video, WAV audio) </li></ul><ul><li>From 90 different source institutions </li></ul><ul><li> (OCLC) (Universities) </li></ul>
  6. 6. Archiving ETDs <ul><li>Every 15 minutes back-ups made of not-yet- approved submissions </li></ul><ul><li>Hourly back-ups of newly approved ETDs </li></ul><ul><li>Weekly back-ups of entire ETD collection </li></ul><ul><li>Copies stored on-site and off-site </li></ul>
  7. 7. System Architecture & Functions <ul><li>Protocol involved? </li></ul><ul><ul><li>Open Archives Initiative protocol </li></ul></ul><ul><li>Markup languages? </li></ul><ul><ul><ul><li>SGML and XML </li></ul></ul></ul><ul><ul><ul><li>HyTime extends SGML with architectural forms to allow handling of rich multimedia and hypermedia content </li></ul></ul></ul><ul><ul><ul><li>RDL (Report Definition Language), allows handling of numeric content in an application of XML </li></ul></ul></ul><ul><ul><ul><li>XBRL (Extensible Business Reporting Language) applies XML to business reporting </li></ul></ul></ul><ul><ul><ul><li>MathML for mathematics, or chemical markup language, is used for particular types of content expression </li></ul></ul></ul>
  8. 8. System Architecture and Functions <ul><li>Programming and script languages involved? </li></ul><ul><ul><li>Protocol may be implemented in many ways </li></ul></ul><ul><ul><li>CGI Script (Perl, C++, Java) </li></ul></ul><ul><ul><li>Java Servlet </li></ul></ul><ul><ul><li>PHP </li></ul></ul>
  9. 9. System Architecture and Functions
  10. 10. System Architecture and Functions Data provider Service provider
  11. 11. Metadata <ul><li>ETD-MS Electronic Thesis and </li></ul><ul><li>Dissertation Metadata Standard </li></ul><ul><li>XML encoding for the full text of ETD </li></ul><ul><li>ETD-MS based on Dublin Core (DC) </li></ul><ul><li>Using RDF (Resource Description Framework) </li></ul><ul><li>Using UNICODE </li></ul><ul><li>Specified relationship with MARC </li></ul>
  12. 12. Metadata <ul><li>Also includes additional elements specific to metadata regarding theses and dissertations </li></ul><ul><li>Designed to handle metadata in many languages </li></ul><ul><li>Controlled vocab {Masters, Doctorate} </li></ul><ul><li>ETD-MS provides details on mapping information about ETD to metadata elements </li></ul>
  13. 13. OCLC and ETD-MS <ul><li>Identify thesis and dissertations (TDs) in WorldCat </li></ul><ul><li>Through OAI make available metadata for WorldCat TDs in both Dublin Core (DC) and ETD-MS </li></ul><ul><li>Provide an authority service for personal names for NDLTD </li></ul><ul><li>Coordinate with other authority services such as LC </li></ul>
  14. 14. NDLTD Members & ETD-MS <ul><li>NDLTD members </li></ul><ul><ul><li>Share metadata for their ETDs </li></ul></ul><ul><ul><li>Provide in either ETD-MS </li></ul></ul><ul><ul><li>Eventually needs to be shared in either MARC21 or UNIMARC </li></ul></ul><ul><ul><li>Run OAI, so their metadata can be harvested accordingly </li></ul></ul>
  15. 15. Source of Metadata <ul><li>Information about the context creator (rights, contributors, publisher) </li></ul><ul><li>Information about the content that will help ETD to be found or discovered (coverage, description, title, subject, relationships) </li></ul><ul><li>Information about the resource (formats, system requirements, date, identification) </li></ul><ul><li>Mandatory, optional, and highly recommended MARC record fields </li></ul><ul><li>Students who submit their ETD can choose the subject fields instead of using LC </li></ul>
  16. 16. How users see Metadata <ul><li>Only some key elements of metadata are exposed and is different in many documents </li></ul><ul><li>Title, subject, author, publisher, date, URI </li></ul><ul><li> </li></ul>
  17. 17. User Interface and Functions <ul><li> (VTLS) </li></ul><ul><li> </li></ul><ul><li> (Scirus) </li></ul>
  18. 18. Implementation Issues <ul><li>Interoperability? Interoperability tests among universities and with UMI (user machine interface) to provide integrated services. </li></ul><ul><li>Sustainability? </li></ul><ul><li>Sponsors: Adobe, IBM, Microsoft, NSF, OCLC, SOLINET, SURA, US Dept. of Ed. </li></ul><ul><li>Scalability? </li></ul><ul><li>Does not seem to be an issue. In March 2000 they held 7, 268 ETDs at 25 source institutions and has grown to 767, 186 ETDs from 90 source institutions. </li></ul>
  19. 19. The End <ul><li>Questions or comments? </li></ul><ul><li>Happy St. Patrick's Day! </li></ul>