Refactoring HUBzero for Linked Data    
Michael Witt; Yongyang Yu

The HUBzero cyberinfrastructure provides a virtual research environment that includes a set of tools for web-based, scientific collaboration and a platform for publishing and using resources such as executable software, source code, images, learning modules, videos, documents, and datasets. Released as open source software in 2010, HUBzero has been implemented on a typical LAMP stack (Linux, Apache, MySQL, and PHP) and utilizes the Joomla! content management system. This paper describes the subsequent refactoring of HUBzero to produce and expose Linked Data from its backend, relational database, altering the external expression of the data without changing its internal structure. The Open Archives Initiative Object Reuse and Exchange (OAI-ORE) specification is applied to model the basic structural semantics of HUBzero resources as Nested Aggregations, and data and metadata are mapped to vocabularies such as Dublin Core and published within the web representations of the resources using RDFa. Resource Maps can be harvested using an RDF crawler or an Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH) data provider that were bundled for demonstration purposes. A visualization was produced to browse and navigate the relations among data and metadata from an example hub.

Treating Data Like Software: A Case for Production Quality Data
Jennifer Schopf

In this short paper, we describe the production data approach to data curation. We argue that by treating data in a similar fashion to how we build production software, that data will be more readily accessible and available for broad re-use. This includes considering third-party; planning for cyclical releases; bug fixes, tracking, and versioning; and issuing licensing and citation information with each release.