Using Metadata for ETDs

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• Using Metadata for ETDs
• - Interoperability and Heterogenity -
• 22.03.2001
• ETD2001 Pasadena
• Susanne Dobratz, Humboldt-University Berlin,
  Germany
• dobratz_at_rz.hu-berlin.de

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Using Dublin Core for ETDs

• Aim
• Development of a Metadata set useable for
  catalagueing and searching digitally born
  documents esp. dissertations
• provide a method to transform metadata and
  contents to be archived by the German National
  Library
• other standards doesnt seem to fit (MARC,
  Z39.50)
• But
• Dublin Core at one university doesnt equal
  Dublin Core at another
• deal with heterogenity of data sets,
  interpretation, encoding, approaches

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Heterogenity of approaches

• Data
• Differences in interpretation (author, approval)
• Different requirements (abstracts, keywords in
  diff. languages, local specialties)
• Databases
• different models/ schemas
• relational databases (Mysql / Sybase / Oracle /
  ...)
• plain HTML 4.0 with Frontpages
• Workflows within university libraries
• Librarians fill in all metadata (correctness)
• Author fills in form (personal metadata, title,
  etc.)

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How to find an agreed Dublin Core Set?

• Semantics
• Round table negotiation about required fields,
  their special interpretation and usage
• Germany 1 Year
• within NDLTD still in progress (version 0.3)
• Syntax
• Defining controlled interfaces to local systems
• for retrieval
• Germany TheO interface based on Harvest software
• for transport -gt archiving in (German) National
  Library

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Dissertation Online
(04/1998 - 10/2000) German Research Association
(DFG)
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DissOnline.de Initiative

• Funding by DFG ended by 10/2000
• Initiative was opened to other parties
• universities, libraries
• publishers
• authors
• individual institutions
• Bureau for coordination German National Library
  (DDB)
• organisation of further developments and
  workshops
• hosting of the dissonline.de information portal
• communication with participants, hotline,
  listserv, ...

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Metadata Reached Results

• Group of Prof. Günter Törner Thorsten Bahne in
  Duisburg (now MathDiss International)
• Development of an Dublin Core Metadata Set for
  dissertations
• Implementation of an input-tool
• MyMetaMaker for Theses
• Suggestion for expressing DC-metadata set for
  theses in RDF
• Working on an international agreement for a DC
  metadata set for theses and dissertations within
  NDLTD

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Metadata Actual Work

• Investigation of Metadata Sets for
  Multimedia-Documents (German National Library)
• containing more than 1 file
• audio/ video information
• Implementation of MetaMaker-Tool for RDF

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Metadata Proposed Process
candidate
adopted from T. Bahne
Internet-user
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TheO Theses Online Broker

• http//www.iwi-iuk.org/dienste/TheO/

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Global Harvest Server Structure
TheO Thesis Online Broker
adopted from K. Zimmermann
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Open Archives Initiative

• Using Open Archives Initiative (OAI) as method to
  set up nationwide distributed network
• OAI provides
• policy for servers
• structure and XML encoding for exchangeable data
• a protocol for requests
• http//www.openarchives.org

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Implementing OAI in Germany

• Universities document servers
• small number of documents (up to 500)
• document formats PDF, HTML, SGML, (PS)
• most use HARVEST software for retrieval
• supported by DINI (www.dini.org)
• plans workshops to spread the idea
• develop a policy for OAI in Germany (2 are
  planned in June Oldenburg, Stuttgart)
• help libraries open their resources (digital
  documents)
• possiblitity to connect library archives with
  NDLTD

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Open Archives Initiative in Germany

• Humboldt-University Berlin HUBerlin
• database approach (sybase) with php4 script
• http//dochost.rz.hu-berlin.de/oai
• University of Oldenburg (Group of Prof. Hilf)
• Harvest compatibility to OAI protocol
• uses php4
• Library of Oldenburg University
• uses mysql php4

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OAI _Identify
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OAI_ListRecords / Resumption Token
Using Virginia Tech Repository Explorer at
http//purl.org/net/oai_explorer