Like many other organisations that are using JPEG 2000, the KB produces two representations of most of its digitised content (newspapers, books, periodicals):
* a high-quality, losslessly compressed JP2 that is the archival master;
* a lesser-quality, lossily compressed JP2 that is used as an access image (this is used for e.g. our newspapers website).
from the Signal - The need to migrate file formats arises out of concerns about format obsolescence. There are ongoing discussions about how acute the format obsolescence problem might be, but for the purpose of this post we’re going to assume that migration is a possible solution to digital stewardship challenges and concentrate on useful resources that support the activity.
Last winter I started a first attempt at identifying preservation risks in PDF files using the Apache Preflight PDF/A validator. This work was later followed up by others in two SPRUCE hackathons in Leeds (see this blog post by Peter Cliff) and London (described here). Much of this later work tacitly assumes that Apache Preflight is able to successfully identify features in PDF that are a potential risk for long-term access.
Lurking in the Lab: Analysis of Data from Molecular Biology Laboratory Instruments in this issue highlights an important evolving issue for science information professionals. That is the inexorable
increase in proprietary information formats and the accompanying need to seamlessly convert the information generated through these formats into generic formats for preservation, migration, and dissemination.
from The Signal - A few of the webinar questions in this post come from the recent Digital Archiving Week 2013
Digital Photo Questions
http://blogs.loc.gov/digitalpreservation/2013/06/what-people-are-asking-...
An excellent report providing some of the evidence needed on the pitfalls of migration - how accurate the migration (or rendering) is. We have migration tools, but we don’t have tools to quality check the migration.
http://archives.govt.nz/sites/default/files/Rendering_Matters.pdf
from The Signal:
I’m struck more by the types of things that I don’t see as often: proposals for practical, applied research that directly address long-time digital stewardship challenges or that build on other stellar research to establish a focused advance towards solutions. Many of the issues that need more focus are the types of things that cause organizations to wait on digital stewardship because the problems aren’t solved yet.
ABSTRACT - Eun G.Park and Sam Oh
This study examines the attributes that have been used to assess file formats in literature and
compiles the most frequently used attributes of file formats to establish open-standard file-format-
selection criteria. A comprehensive review was undertaken to identify the current knowledge
regarding file-format-selection criteria. The findings indicate that the most common criteria can be
categorized into five major groups: functionality, metadata, openness, interoperability, and
D-Lib Magazine, May/June 2011, Volume 17, Number 5/6 - This article raises some issues in regards to ICC profiles and other suggested changes to enable better long term interoperability and minimise risks.
http://www.dlib.org/dlib/may11/vanderknijff/05vanderknijff.html
Federal Agencies Digitization Guidelines Initiative (FADGI) - JPEG2000 Summit Workshop 2011The Library of Congress hosted a JPEG 2000 Summit on May 12-13, 2011, sponsored by the Federal Agencies Digitization Guidelines Initiative with support from the National Digital Information Infrastructure and Preservation Program.
http://www.digitizationguidelines.gov/resources/jpeg2000.html
Presentations and additional useful resources can be found on the site