We Want You Just the Way You Are: The What, Why and When of Fixity

Fixity, the property of a digital file or object being fixed or unchanged, is a cornerstone of digital preservation. Fixity information, from simple file counts or file size values to more precise checksums and cryptographic hashes, is data used to verify whether an object has been altered or degraded. Many in the preservation community know […]

Protect Your Data: File Fixity and Data Integrity

The following is a guest post by Jefferson Bailey, Strategic Initiatives Manager at Metropolitan New York Library Council, National Digital Stewardship Alliance Innovation Working Group co-chair and a former Fellow in the Library of Congress’s Office of Strategic Initiatives. Here on The Signal, members of the NDSA Levels of Digital Preservation team have been providing some […]

It’s Not Just Integrity: Fixity Data in Digital Sound and Moving Image Files

This blog post is co-authored by Carl Fleischhauer, Project Manager, Digital Initiatives, Library of Congress. People who manage audio and video files over time, do create fixity data, aka hash values or checksums, to help monitor the condition of those files in storage and when moved from one system or media to another system or […]

Hey, I’m A Label/ Artist – What Does Bit-level Fixity Mean And Why Should I Care?

The following is a guest post from John Spencer, President BMS Chace, and coordinating committee member for the National Digital Stewardship Alliance. In this post, Spencer shares information he presented on a National Digital Stewardship Alliance panel on the importance of understanding bit level threats to preserving digital content (PDF) at the 2012 NDIIPP Digital […]

Fixity and Fluidity in Digital Preservation

Kent Anderson offers a provocative post in The Mirage of Fixity — Selling an Idea Before Understanding the Concept.  Anderson takes Nicholas Carr to task for an article in the Wall Street Journal bemoaning the death of textual fixity.  Here’s a quote from Carr: Once digitized, a page of words loses its fixity. It can change […]

File Fixity and Digital Preservation Storage: More Results from the NDSA Storage Survey

The following is a guest post by Jefferson Bailey, Fellow at the Library of Congress’s Office of Strategic Initiatives. A vexing property of digital objects is the difficulties they pose to ensuring their ongoing authenticity and stability. Files can become corrupted by use, bits can rot even when unused, and during transfer the parts essential […]

An Archivist’s Perspective on Legacy Files

In this post, 2020 Staff Innovator Chad Conrady discusses his area of expertise, emulation, which imitates older operating systems in order to open outdated or legacy files that are no longer operable with contemporary operating systems or software.

 

In the Library’s Web Archives: Sorting through a Set of US Government PDFs

The Digital Content Management section has been working on a project to extract and make available sets of files from the Library’s significant web archives holdings. This is another step to explore the web archives and make them more widely accessible and usable. Our aim in creating these sets is to identify reusable, “real world” content in the Library’s […]

Minimal Digital Processing at the American Folklife Center

This is a guest post by former American Folklife Center intern Annie Schweikert on her work to develop a minimal digital processing workflow. Annie is an MA candidate at NYU’s Moving Image Archiving and Preservation program who interned at the Library of Congress American Folklife Center in the summer of 2018. Other recent internships include […]