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How can repositories support the text-mining of their content and why?

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Co-presented with Petr Knoth http://www.slideshare.net/petrknoth/ at the "Mining Repositories: How to assist the research and academic community on their text and data mining needs" workshop, which took place at the 11th International Conference on Open Repositories, Monday 13 June 2016.

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How can repositories support the text-mining of their content and why?

  1. 1. How can repositories support the text-mining of their content and why? @openminted_eu Dr. Petr Knoth and Dr. Nancy Pontika Knowledge Media institute, The Open University United Kingdom Twitter: @oacore
  2. 2. Why should repositories support TDM? @openminted_eu
  3. 3. @openminted_eu In the UK
  4. 4. Repositories and TDM @openminted_eu Institutional Repositories Subject Repositories Publishers/ OA journals Other sources: Research Networking Services Primary Research Data... Text Mining Services
  5. 5. TDM & Repositories Managers @openminted_eu • Established and maintain a close collaboration with researchers • Extensive experience in advocacy, i.e. open access • Knowledgeable about the repository’s collection • Participate in the Academic Institution’s Research Committees • Knowledgeable of your repository’s collection • Familiarity with Copyright issues and Creative Commons Licenses
  6. 6. How can repositories support TDM? TDM is all about processing text and data at scale. The role of repositories is to facilitate the aggregation of research papers at a full-text level (and beyond) effectively enabling TDM services to operate seamlessly on all available research content. 7
  7. 7. What is the problem? @openminted_eu • A small study (Knoth, 2013) • 83 repositories - mainly Eprints with PDF research outputs • 1,461,016 metadata records metadata linked to content content downloadable content machine readable Mean 54.1% 34.4% 27.6% Median 39.5% 16.7% 13.0% Standard deviation 39.2% 34.2% 31.0%
  8. 8. How is content aggregated today? @openminted_eu • DC over OAI-PMH: vast majority of repositories, never intended to support content harvesting. The main problem: linking metadata with content. “The nature of a resource identifier is outside the scope of the OAI- PMH. To facilitate access to the resource associated with harvested metadata, repositories should use an element in metadata records to establish a linkage between the record (and the identifier of its item) and the identifier (URL, URN, DOI, etc.) of the associated resource. The mandatory Dublin Core format provides the identifier element that should be used for this purpose.”
  9. 9. How is content aggregated today? @openminted_eu • RIOXX: Just one identifier, recommends the identifier points to the actual resource being described. • OpenAIRE Guidelines: identifier links to either the resource or a jump-off page. Does allow multiple identifiers. • ResourceSync • CrossRef: comercial publishers/journals
  10. 10. The content referencing problem @openminted_eu
  11. 11. Principle 1: content referencing Repositories should always establish a link from the metadata record to the item the metadata record describes using a dereferencable identifier pointing to the version held locally in the repository. The dereferencable identifier should be provided in the appropriate metadata element in the used metadata format (i.e. dc:identifier in the case of Dublin Core). If multiple identifiers are used, it is recommended listing the local dereferencable identifier first. 1
  12. 12. The accessibility of repositories to harvesting systems @openminted_eu
  13. 13. Principle 2: Content accessibility to machines Repositories must provide universal access to machines with the same level of access as humans have. It is the role of repositories to allow aggregators to harvest the entire content of the repository in a reasonable time to enable acquiring and maintain up-to-date information about the repository content. 1
  14. 14. What can repositories do? @openminted_eu • Ensure correct referencing of content from metadata: • Dereferencable link which resolves to content • Locally held (content under its control) • Using a standard repository platform can help • Check robots.txt • Register your repository • Advocate for good pdf (media) quality of deposited content • Use monitoring tools • CORE Repository Dashboard • OpenAIRE Repository Manager Dashboard • Machine readable licensing
  15. 15. beyond Open Access MAKING SENSE OF LARGE VOLUMES OF SCIENTIFIC CONTENT 1
  16. 16. Interested in how to TDM research papers? @openminted_eu We have 3 more talks tomorrow! Developer track 1, 11:00 Mining Open Access publications with CORE
  17. 17. Interested in how to TDM research papers? @openminted_eu We have 3 more talks tomorrow! Developer track 1, 11:20 Oxford vs Cambridge Contest: Collecting Open Research Evaluation Metrics for University Ranking
  18. 18. Interested in how to TDM research papers? @openminted_eu We have 3 more talks tomorrow! Papers 4, 4:00 Exploring Semantometrics: full text-based research evaluation for open repositories
  19. 19. Thank you Dr. Pert Knoth,, Research Fellow petr.knoth@open.ac.uk Dr. Nancy Pontika, Open Access Aggregation Officer nancy.pontika@open.ac.uk . 2

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