Digital Library EXtension Service DLXS

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Digital Library EXtension Service (DLXS)

• The University of Michigan Digital Library
  eXtension Service (DLXS) provides the foundation
  and the framework to develop digital library
  collections.
• Uses XPAT (a SGML/XML-aware search engine).
• support for word and phrase searching
• indexing of SGML elements and attributes
• baseline of support for XML
• fast retrieval
• open systems integration.

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Digital Library EXtension Service (DLXS)

• Middleware
• Open Source Digital Library "Access" Tool
• Uses PERL and object-oriented methods.
• DLXS Classes - Access mechanisms for many types
  of digital collections.
• Bibliographic Class
• Findaid Class
• Image Class
• Text Class

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Digital Library EXtension Service (DLXS)

• Bibliographic Class (BibClass)
• provides metadata for harvesting by OAI and to
  aid in searching citations.
• search, display, and management or citations
• resource discovery of bibliographic information
  managed outside of large integrated library
  systems.
• OAI harvesting of Text Class, Image Class or
  Findaid Class collections.

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Digital Library EXtension Service (DLXS)

• FindAid Class
• consists of EAD2002-encoded Finding Aids
• search and retrieval of Finding Aids
• searching across multiple collections of Finding
  Aids simultaneously or independently
• bookmarking of individual Finding Aids
• access restrictions at the collection level

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Digital Library EXtension Service (DLXS)

• Image Class
• supports a wide variety of media formats,
  including specialized support for JPEG2000 and
  MrSID images.
• searching of Images based on descriptive data.
• tools for generating JPEG2000 files
• searching across multiple collections of Image
  Class simultaneously or independently
• bookmarking of individual items.

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Digital Library EXtension Service (DLXS)

• Text Class
• consists primarily of monographic material (books
  and pamphlets), journals and letters.
• search and retrieval of electronic texts
• searching across multiple collections
  simultaneously or independently
• displays a text as HTML and/or as a page image,
  as appropriate
• bookmarking of individual texts
• access restrictions at the collection level

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Digital Library EXtension Service (DLXS)

• OverView
• Access, navigation delivery of structured
  documents Image and Bib searching Fulltext
  collection searching
• MySQL database used.
• XPAT Search Engine
• Cross Collection Searching
• Page Turner uses TIF-to-GIF TIF-to-PDF or static
  images

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Digital Library EXtension Service (DLXS)

• MrSID and JPEG2000 used for image manipulation
• Metadata SGML/XML, TEI, EAD
• OAI compatible (Bib Class)
• Open Source and written in PERL.
• Uses XML/XSL Delivery to HTML (version 12)
• Journal Publishing Capability (version 12)
• Uses Cookies to hold Session ID (version 12)

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Digital Library EXtension Service (DLXS)

• Dynamic Browse as well static browse
• Item level authorizations (version 12)
• Unicode UTF-8 as well as Latin1 (version 12)
• Prototype for newspaper viewing (version 12)
• Programmer intensive installation and maintenance

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Digital Library EXtension Service (DLXS)

• EXAMPLES