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1 XML as a preservation strategy Experiences with the DiVA document format Eva Müller, Uwe Klosa Electronic Publishing Centre Uppsala University Library,

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Presentation on theme: "1 XML as a preservation strategy Experiences with the DiVA document format Eva Müller, Uwe Klosa Electronic Publishing Centre Uppsala University Library,"— Presentation transcript:

1 1 XML as a preservation strategy Experiences with the DiVA document format Eva Müller, Uwe Klosa Electronic Publishing Centre Uppsala University Library, Sweden

2 2 Outline DiVA project and its objectives DiVA publishing system DiVA document format (DDF) Experiences with the DDF Conclusions and next steps

3 3 DiVA Project Start 2000; 2002 DiVA.1; 2004 DiVA.2 Nine universities in three countries; number increasing Objectives: –Technical solutions & well functioning work flow supporting fulltext publishing, storage and dissemination of university research (theses, dissertations, working and research papers…) –Explore ways to ensure the future use and understanding of digital objects in the archive

4 4 … solutions focusing on Services –production –storage –preservation –retrieval –dissemination Format (metadata + stored documents) Work flows

5 5 Assumption that storage format is essential Level of enabled services depends on granularity level of structure of the data stored within the system Level of guarantees given for future use and understanding of the digital objects in the archive depends on the format used

6 6 DiVA Publishing System makes it possible to reuse and enhance the data directly from the source document originally created by authors, both for metadata and a digital master for electronic & printed versions assign a persistent identifier, store & checksum all files in a local archive send a copy to the national library archives and other interested parties

7 7 Author DiVA Manager Local Repository Word Processor Word Processing Format (Template) DiVA Document Format Local Long-term Storage Long-term storage packages DiVA Document Format

8 8 Implementation Java – XML technologies Currently an Oracle database used for indexing and searching Architecture: component-based design –Modularity and reusability of the components –Possibility to seamlessly replace modules with improved implementations of the component

9 9 DiVA Document Format (DDF) Internal format developed for, but not limited to, academic publications Version 1.0 (defined by an XML Schema) –http://publications.uu.se/schema/ddf/http://publications.uu.se/schema/ddf/ –Component based –Extensible –Administrative metadata elements are combined with descriptive elements –Elements conforming to DocBook DTD are used for the content part of the document

10 10 Why a customized format? DiVA document – the result of a practical approach demanding self-description clear structure support for export to other formats/schemas compatibility with a number of metadata formats/schemas easy reuse of data

11 11 Why XML? Open and established notation Support for international character sets (UNICODE) A simple and human readable text format … characteristics facilitate data migration and the documents are likely to have longevity

12 12 Why XML Schema rather than DTD? “XML schema provides means for defining the structure, content and semantics of XML documents” It’s written in XML It supports data types, self-defined data types and namespaces  validation, restriction definition, data format definition …

13 13 http://publications.uu.se/schema/ddf/

14 14 The global structure of the DiVA document Metadata description of publication, which may contain fulltext document –Root element documents to allow many documents to be included in a single file –Each individual document is described within document element –If the fulltext is included it appears within the contents element

15 15 …global structure of the DiVA XML document 2004 01 27 14:28...the metadata......the fulltext contents...

16 16 Metadata http://publications.uu.se/schema/ddf/divametadata.html#DocumentStructure http://publications.uu.se/schema/ddf/divametadata.html#DocumentStructure Common elements [e.g. properties, identifiers, specifics, languages, creators, contributors, titles, abstracts, contents, note..] Manifestations - container for one or more manifestation elements that contain metadata about a particular format of the document [e.g. properties, date, time, edition, publisher, distributors, archivers …] Mappings [ DC/RDF, MARCXML, METS, MODS, TEI Header, Endnote, MARC21…]

17 17 Components For example addressType personType organisationType

18 18

19 19

20 20

21 21 DDF in the DiVA system Subsystem interface Source for other formats (DocBook, TEI, Marc 21, DC etc.) Long-term preservation format

22 22 DiVA Document Format Dublin Core MARC 21 TEI Header Endnote Reference Manager PDF Documents Title Page Posting Edition Notice Fulltext Web Pages Browsing Searching Coming theses Current theses OAI Content Provider National Library System (LIBRIS) Local Database Local Library Systems Export Formats Local Database Service Providers Word Processor Author Word Processing Format (Template) Long-term preservation

23 23 Archiving Package

24 24 DiVA Archive Web portal DiVA Manager National long-term storage Local long-term storage packages xml

25 25 How is the format produced? Automated work flow based on delivery of information in templates Tools for conversion from Word processing templates (MS Word/Open Office – XML) Work in progress – MathML + images Demo – http://

26 26 Word processor template Word document OpenOffice XML-dokument DiVA Manager MS Word Import

27 27 Next steps Revisions and extensions of DDF Multiple file manifestations Rights metadata Extended preservation metadata Relations to other resources -DiVA.2 scheduled January 2005 - open for comments

28 28 More information The DiVA Project - Development of an Electronic Publishing System [English] (D-Lib Magazine, (9)2003:11) http://www.dlib.org/dlib/november03/muller/11muller.html http://www.dlib.org/dlib/november03/muller/11muller.html Archiving Workflow Between a Local Repository and the National Archive [English] (2003-08-18: ECDL 2003, Web Archives, Workshop) http://publications.uu.se/epcentre/conferences/ecdl2003/archiving_EC DL_2003.pdf http://publications.uu.se/epcentre/conferences/ecdl2003/archiving_EC DL_2003.pdf Using XML for Long-term Preservation : Experiences from the DiVA Project [English] (2003-05-22: ETD 2003: Next Steps - Electronic Theses and Dissertations Worldwide, Berlin) http://publications.uu.se/etd2003/papers/LongTermPreservation.pdf http://publications.uu.se/etd2003/papers/LongTermPreservation.pdf DiVA portal – http://www.diva-portal.org/http://www.diva-portal.org/

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