Here's an excerpt from the announcement:
The Internet makes it possible to present publications in combination with related research data, as Enhanced Publications. The Enhanced Journals…Made Easy project (EJME), which is funded by SURF, has designed a practical work process for publishers of Open Access journals so as to enhance academic journals with the associated data files. The project involved the development of two plug-ins for Open Journal Systems, a system for managing and publishing journals. Open Journal Systems (OJS) is the most frequently used open source package worldwide for academic journals.