I admit it: Ive been prone to using the terms digital preservation, digital curation and digital stewardship interchangeably without thinking too hard about their origins or subtle differences. Where do these different terms come from and what do they imply? Lets briefly explore the slightly different (though often overlapping) approaches of preservationistas, curators and stewards.
The Oxford English Dictionary defines preserve as to keep in its original or existing state. This idea of preserving has long been part of the Library of Congress mission, so it was with little surprise that our program to address the challenges of digital materials was named the National Digital Information Infrastructure and Preservation Program; the founding NDIIPP report was called Preserving our Digital Heritage (PDF); and that our website is called digitalpreservation.gov. Working to figure out how to not lose existing digital information was a significant early driver of NDIIPP.
In contrast, digital curation concepts started to appear after digital preservation had already put a stake in the ground. Curation takes a whole life approach to digital materials to address the selection, maintenance, collection and archiving of digital assets in addition to their preservation. (See this article for more background on the concept.)
Digital curation concepts largely arose from the scientific data and e-science communities, who have traditionally been driven more by immediate data re-use concerns than by preserving as an abstract concept.
A pair of key documents from early 2003 helped shape curation concepts. The first, Revolutionizing Science and Engineering Through Cyberinfrastructure laid out the concept of a distributed technical research environment (If infrastructure is required for an industrial economy, then we could say that cyberinfrastructure is required for a knowledge economy.), but also posited conceptual government program models of curation that would ensure that the exponentially growing data is collected, curated, managed, and archived for long-term access by scientists (and their IT applications) everywhere
The Data Deluge: An e-Science Perspective report (PDF) from the UK touched on some of the same issues, establishing the curatorial data-centric view of the universe (Data from a wide variety of new sources will need to be annotated with metadata, archived and curated so that both the data and the programs used to transform can be reproduced in the future). The UK Digital Curation Centre followed shortly in 2004, one outcome of evolving curation approaches.
Curation is a useful concept for describing the evolving whole-life view of digital preservation, but concentrates on underpinning activities of building and managing collections of digital assets and so does not fully describe a more broad approach to digital materials management.
Additionally, the term curation has started to gain traction outside of the libraries and archives universe (especially in the US) under the rubric of content curation, often defined as the aggregation, organizing and filtering of web resources around particular subject areas.
The further development of this meme, especially in marketing, may well create an employment boomlet for librarians, but the conflicting definitions do muddy the water for the established digital preservation community.
Enter stewardship. Stewardship concepts evolved out of the environmental community, but that communitys idea of holding resources in trust for future generations has long resonated in the digital preservation community.
Digital stewardship satisfyingly brings preservation and curation together in one big, happy package, pulling in the lifecycle approach of curation along with research in digital libraries and electronic records archiving, broadening the emphasis from the e-science community on scientific data to address all digital materials, while continuing to emphasize digital preservation as a core component of action. More background on stewardship and its differences from curation can be found in Cooperation and Collaboration in Teaching and Research: Trends in LIS Education (PDF).
Which leads us to the National Digital Stewardship Alliance. The NDSA incorporates this unified vision of digital information management with the shared goal of leveraging community collaboration to ensure enduring access to digital information over the long-term.
So…which of these terms best describes what you do?