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The Digital Library Extension Service

The Digital Library Extension Service (DLXS) is an open-source production system designed to provide seamless access to various digital library materials. It focuses on four primary classes of resources: text, image, bibliographic data, and finding aids, developed through collaborative efforts and innovative tools. With support for metadata integration, bibliographic systems, and scalability for extensive citations, DLXS simplifies online collections creation. This toolkit prioritizes open-source solutions, balancing cost-effective commercial tools, ensuring high functionality, and continuous development to meet evolving library needs.

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The Digital Library Extension Service

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  1. The Digital Library Extension Service An Open Source Production Digital Library Access System

  2. What is DLXS? • Two pronged development effort, • Free Open Source DL tools focusing on 4 broad “classes” of materials • XPAT development

  3. DLXS Classes • Text class • Image class • Bibliographic class • Finding aids (pre-class)

  4. Text Class • Retrospective conversion (Making of America) • Text encoding projects (Lincoln) • Modern publishing (Philosopher’s Imprint)

  5. Image Class • Lingua franca for Tower of Babel: many forms of metadata brought together or maintained distinctly • Growing degree of support for tools

  6. Bibliographic Class • Tools you would expect to find with bibliographic systems • Scalability (e.g., 17 million citations in Times Index) • Simplicity: less than an hour to put a collection online

  7. Finding Aids (pre-Class) • Driven by EAD application guidelines

  8. Origins of this Work • Mediating role of DLPS • Host services • MESL work • Production responsibilities at UM (since 1996) • Integration in Library (e.g., Preservation) • Work with many resources • (> 30 distinct systems; > 20 DTDs before reconciliation)

  9. Why Open Source DL toolkit? • Does it make sense to have $300k “products” that are essentially closed? • Distributed development with many contributors. • Coordinating appropriate free, open source tools with effective low-cost commercial tools • Balancing commercial (e.g., Oracle for AuthN/AuthZ) and Open Source (mySQL for object management)

  10. XPAT • low cost licensed tool • $15k one-time • $5k/year for support and updates • great support/development • high functionality

  11. Near- and Medium-Term Future of DLXS • Near-term • Medium-term • Long-term

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