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Health Informatics Student Edward Krause Wins Drexel Research Day Award

Edward Krause
Master of science in health informatics student Edward Krause stands with his poster titled "Evolution of a Metadata Application Profile for a Digital Data Repository," which earned an award for best poster in the computation and modeling (non-bio) category at Drexel Research Day on May 1.

May 7, 2015

Drexel University’s College of Computing & Informatics (CCI) congratulates master of science in health informatics student Edward Krause on winning best poster in the computation and modeling (non-bio) category at the 2015 Drexel Research Day.

Drexel Research Day is an annual celebration of research, innovation, scholarship and creativity at the University, wherein undergraduate and graduate students participate in a day of posters and presentations. This year’s Research Day was held on Friday, May 1 in the Daskalakis Athletic Center at 33rd and Market Streets on Drexel's University City Campus.

The winning poster, titled “Evolution of a Metadata Application Profile for a Digital Data Repository” (complete abstract listed below), was co-authored by CCI professional staff members Erin Clary and Adrian Ogletree, and co-authored/advised by Alice B. Kroeger Professor Jane Greenberg.

Krause serves as Dryad assistant curator in CCI’s Metadata Research Center, of which Greenberg is the director.  Clary and Ogletree support the MRC as Dryad curator and research project manager, respectively. Krause’s areas of study include public health informatics, data management and healthcare metadata.


Dryad is a curated, digital archive for data associated with scholarly publications. In an effort to facilitate the discoverability, reusability, and interoperability of archived content, Dryad has implemented a standardized set of metadata elements in the form of an application profile. Dryad metadata captures information about data packages, which are comprised of individual data files, the associated scholarly publication, and the relationships among these entities. This research examines the evolution of Dryad’s application profile from its inception in 2007 as version 1.0 through the last update in 2013 as version 3.1, and documents current practice as version 3.2. We model the relationships between data packages, data files, and publications for each version of the application profile and perform a crosswalk analysis to map equivalent metadata elements across each version. Results covering versions 1.0 to 3.0 show an increase in the number of metadata elements used to describe data objects in Dryad. Results also confirm that Version 3.0, which envisioned separate metadata element sets for data package, data files, and publication metadata, was never fully realized due to constraints in Dryad system architecture. Version 3.1 subsequently reduced the number of metadata elements captured by recombining the publication and data package element sets.  Version 3.2 represents the current metadata practices in Dryad and demonstrates changes in the content and functionality of the repository. This work aligns the application profile with current Dryad practices and informs a larger effort to meet the needs of Dryad's diverse community of stakeholders and its expanding scope.