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Digital Preservation

The Library of Congress > Digital Preservation > National Digital Stewardship Alliance


The 2015 National Agenda for Digital Stewardship is now available!

The 2015 National Agenda integrates the perspective of dozens of experts and hundreds of institutions to provide funders and other executive decision-makers with insight into emerging technological trends, gaps in digital stewardship capacity, and key areas for development. Download the Executive Summary (PDF, 885 KB) and/or Full Document (PDF, 663 KB).

Report: "2013 Web Archiving Survey"

A report (PDF, 1010 KB) written by the Content Working Group on the results of the Fall 2013 survey of U.S. organizations engaged in web archiving or in the process of planning a web archive. A list of the survey questions is available here (PDF).

Report: "Checking Your Digital Content: What is Fixity, and When Should I be Checking It?"

A report (PDF, 150 KB) written by a joint action team of the Infrastructure and Standards and Practices Working Groups that addresses the need for guidance on fixity and audit and repair strategies as a core goal of digital preservation. This document aims to help stewards answer these questions in a way that makes sense for their organization based on their needs and resources.

Report: "The Benefits and Risks of the PDF/A-3 File Format for Archival Institutions"

A report (PDF, 914 KB) created by the Standards and Practices Working Group that takes a measured look at the costs and benefits of the widespread use of the PDF/A-3 format, especially as it effects content arriving in collecting institutions. It provides background on the technical development of the specification, identifies specific scenarios under which the format might be used and suggests policy prescriptions for collecting institutions to consider. More information in a 2/20/14 blog post on the Signal.

Our Mission

The mission of the National Digital Stewardship Alliance is to establish, maintain, and advance the capacity to preserve our nation's digital resources for the benefit of present and future generations.

Our Work

Members collaborate to preserve access to our national digital heritage. The NDSA accomplishes its goals through working groups with strategic direction from the Coordinating Committee.

The NDSA has established five Working Groups focusing on the following areas of digital stewardship: Content; Standards and Practices; Infrastructure; Innovation; and Outreach.


selection and aquisition of digital collections


digital formats and best practices


development and maintenance of tools


cutting edge research and development


relationships and messaging

Our Members

NDSA organizations have proven themselves committed to long term preservation of digital information. Our members include universities, consortia, professional societies, commercial businesses, professional associations, and government agencies at the federal, state, and local level. For a list of members, click "NDSA" on this page.

Learn more about membership to the NDSA.

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