Showing posts with label formats. Show all posts
Showing posts with label formats. Show all posts

Friday, March 6, 2015

Infokit: Digital file formats

Infokit: Digital file formats. Matt Faber. JISC. March 6, 2015.
JISC has released a new infokit resource on Digital file formats. The infokit presents an overview of the current state of digital file formats for still images, audio and moving images, and it is looking toward future formats, and shifts to new formats from previously popular formats.
Choosing the right file format is important to successfully creating, digitizing, delivering, and preserving the digital media objects:
  • The format helps define the quality of a digital object. 
  • Using poorly supported formats that may restrict or block use will hinder file distribution
  • Selecting a proprietary format with a short shelf life, or a compressed format that irreversibly loses data will hamper digital preservation
  • Selecting the right format for a project should not be taken lightly

Maintenance of digital media files is an ongoing process. This kit is to:
  • Provide a comprehensive understanding of what a file format is 
  • The considerations in choosing the correct format for your project
  • Provide quick and practical answers to ‘what file format should I use for…? 
  • Help identify uncommon digital file formats.
  • Provide in-depth technical information about the digital files and file format properties.


Saturday, February 28, 2015

OxGarage Conversion

OxGarage Conversion. Website. February 27, 2015.
An interesting web tool from the University of Oxford for converting documents to different formats.  OxGarage is a web, and RESTful, service to transform documents between a variety of formats, which uses the Text Encoding Initiative format as a pivot format.The initial option is to select:
  • Documents
  • Presentations
  • Spreadsheets
There are dozens of source and target formats listed, such as Word, WordPerfect, RSS, PDF, ppt, csv, xls, and so forth. There is an option when you upload an XML document with links to images on your computer to also add the images.  If you have a document with links to images on the internet, these will be downloaded and included with your document.
 

Thursday, February 26, 2015

Library of Congress Recommended Format Specifications. Comments Requested.

Library of Congress Recommended Format Specifications.  Library of Congress website. February 26, 2015.
Comments and feedback requested by March 31, 2015.
Because of the dynamic, ever-changing nature and availability of formats, the Library plans to revisit the specifications annually. Reviewing the specifications annually will permit the Library to keep pace with developments in the creative world, so that changes to the Format Specifications, although made frequently, can be made in small increments. Input and feedback are greatly encouraged and welcomed.


Why Digital Storage Formats Are So Risky

Why Digital Storage Formats Are So Risky.  Matthew Woollard.  Lifehacker. 25 February 2015.
While it may seem that digital files last forever, the growing digital sphere faces enormous losses. Even Google has been unable to ensure access for its archive of digital content. Technical solutions already exist, but they’re not well known and relatively expensive.

How much are we prepared to pay to ensure that digital content that exists today will be usable in the future? We need to think about the value of the content and decide if it is worth keeping. Determining the value can be difficult. However, "re-use is a significant benefit from preserving data and adds value." Besides economic value, there are also cultural and intellectual reasons for preserving data. An example of preservation of data from the middle ages can be seen with scribes that used wax tablets for temporary records, and parchment for permanent records.

The chances of born-digital material being usable in 100 years will be considerably improved by actively taking steps now to ensure the preservation of the items. Effective digital preservation relies on the activities of the creator as well as the archivist. It is important to make decisions about providing context, the types of formats to use, how to organize the material, and resolving rights issues to avoid future problems. 

Saturday, February 7, 2015

Digital Tools and Apps

Digital Tools and Apps. Chris Erickson. Presentation for ULA. 2014. [PDF]
This is a presentation I created for ULA to briefly outline a few tools that I find helpful. There are many useful tools, and more are being created all the time. Here are a few that I use.
  • Copy & Transfer Tools: WinSCP; Teracopy;
  • Rename Tools: Bulk Rename Utility
  • Integrity & Fixity Tools: MD5Summer; MD5sums 1.2; Quick Hash; Hash Tool
  • File Editing Tools: Babelpad; Notepad++; XML Notepad; 
    • ExifTool; BWF MetaEdit; BWAV Reader;
  • File Format Tools: DROID; 
  • File Conversion:  Calibre; Adobe Portfolio;
  • Others: A whole list of other tools that I use or suggest you look at.
    •  PDF/A tools
    • Email tools
 Please let me know what tools you find helpful.

Tuesday, February 3, 2015

Office Opens up with OOXML

Office Opens up with OOXML. Carl Fleischhauer, Kate Murray. The Signal. February 3, 2015.
Nine new format descriptions have been added to the Library’s Format Sustainability Web site. These closely related formats relate to the Office Open XML (OOXML) family, which are the formats of the Microsoft family of “Office” desktop applications, including Word, PowerPoint and Excel. Formerly, these applications produced files in proprietary, binary formats with the extensions doc, ppt, and xls. The current versions employ an XML structure for the data and an x has been added to the extensions: docx, pptx, and xlsx.

"In addition to giving the formats an XML expression, Microsoft also decided to move the formats out of proprietary status and into a standardized form (now focus on the word Open in the name.) Three international organizations cooperated to standardize OOXML."

The list of the nine:
  • OOXML_Family, OOXML Format Family, ISO/IEC 29500 and ECMA 376
  • OPC/OOXML_2012, Open Packaging Conventions (Office Open XML), ISO 29500-2:2008-2012
  • DOCX/OOXML_2012, DOCX Transitional (Office Open XML), ISO 29500:2008-2012; ECMA-376, Editions 1-4
  • DOCX/OOXML_Strict_2012, DOCX Strict (Office Open XML), ISO 29500:2008-2012; ECMA-376, Editions 2-4
  • PPTX/OOXML_2012, PPTX Transitional (Office Open XML), ISO 29500:2008-2012; ECMA-376, Editions 1-4
  • PPTX/OOXML_Strict_2012, PPTX Strict (Office Open XML), ISO 29500:2008-2012; ECMA-376, Editions 2-4
  • XLSX/OOXML_2012, XLSX Transitional (Office Open XML), ISO 29500:2008-2012; ECMA-376, Editions 1-4
  • XLSX/OOXML_Strict_2012, XLSX Strict (Office Open XML), ISO 29500:2008-2012; ECMA-376, Editions 2-4
  • MCE/OOXML_2012, Markup Compatibility and Extensibility (Office Open XML), ISO 29500-3:2008-2012, ECMA-376, Editions 1-4
 "Meanwhile, readers should remember that the Format Sustainability Web site is not limited to formats that we consider desirable. We list as many formats (and subformats) as we can, as objectively as we can, so that others can choose the ones they prefer for a particular body of content and for particular use cases."


Wednesday, January 21, 2015

Creating and Archiving Born Digital Video

Creating and Archiving Born Digital Video. Library of Congress. December 2, 2014.
Four PDF documents from the Library of Congress / The FADGI Audio-Visual Working Group. They provide practical technical information for both file creators and file archivists to help them make informed decisions when creating or archiving born digital video files and to understand the long term consequences of those decisions.
  •  Part 1. Introduction. Explanatory document.
    These recommended practices are intended to support informed decision-making and guide file creators and archivists as they seek out processes, file characteristics, and other practices that will yield files with the greatest preservation potential.
    The documents and case histories show that there is no one answer to the question “what format should I use to ensure sustainable long term access for my born digital video files?” Instead, there is "a range of solutions based on the fitness for purpose concept where the workflows and deliverables achieve the specific goals set out for the project within the existing constraints and circumstances."
  • Part 2. Eight Federal Case Histories. This report presents eight case histories documenting the current state of practice in six federal agencies working with born digital video, divided into 3 creating cases, and three archiving cases.The goal of the three Creating case histories is to encourage a thoughtful approach from the very beginning of the video production project,  which takes sustainability and interoperability into account. The three Archiving case histories show issues of moving the files into repositories, and explore the issues of long term retention and access. The report contains recommended practices, requirements, advice, examples of when following recommended practices is not practical, costs, and lessons learned. At the end are helpful File Characteristic Comparison Tables summarizing the specifications of the creating and archiving case histories, both video and audio data.
  • Part 3. High Level Recommended Practice. This document outlines a set of high level recommended practices for creating and archiving born digital video, with advice for file creators, archivists, and advice for both that transcend life cycle points.Some important general points:
    • Born digital video files should be the highest quality that the institution can afford to make and maintain over the long term.
    • Project planning should include capabilities to create high quality digital video files and metadata from the outset
    • One of the most important functions of archival repositories is to document their holdings.
    • Identify the file characteristics at the most granular level possible, including the wrapper and video stream encoding 
    • It's essential in an archival environment to understand why changes to the technical characteristics of the file are needed and the impacts of these changes on the data.
    • Equally as important is to document all the changes to order to document provenance.
    • Create metadata to support life cycle management
    • Plan for access: high quality born digital video files may need additional processing to be made widely available
  • Part 4. Resource Guide. This document includes links to resources including those referred to in the case histories and recommended practices. Contains an excellent resource list to websites, documents, white papers, tools; they cover the areas of storage; transcoding / editing and other technical tools; inventorying and processing; digitizing, capture, preservation & quality control; authenticity, fixity & integrity; file naming; metadata; formats; standards; video creation; equipment and capture devices. 
[The report mentions the program ImgBurn for creating ISO images from files. Be aware the install files include OpenCandy (considered malware/ nuisance ware) which will be flagged by Symantec, AVG, and other anti-virus programs.]


Monday, January 19, 2015

Ensuring long-term access: PDF validation with JHOVE?

Ensuring long-term access: PDF validation with JHOVE? Yvonne Friese. ZBW - Leibniz Information Centre for Economics.  PDF Association. December 17, 2014.
JHOVE is an open source tool for identifying, characterizing and validating twelve common formats such as pdf, tiff, jpeg, aiff and wave.  Pages within a PDF file are usually stored as a page tree, allowing the user to reach a given page as quickly as possible. Common advice for long-term archiving is to preferentially use the PDF/A format. However, this no longer matches to the day-to-day reality of many workflows which use JHOVE for validation tests. The differences between PDF and PDF/A means that there there can be validation errors. JHOVE’s PDF module is certainly capable of validating PDF/A files but the feature does not work well.  The process does not analyze the content of the data streams, meaning that it cannot validate PDF/A compliance in line with ISO standards. JHOVE is not suited to PDF/A validation but there currently are no alternatives to JHOVE for validating standard PDFs.

JHOVE can still be useful, provided users understand its error reports and are aware of ways to resolve them. Even with the problems JHOVE remains an excellent option for providing initial guidance.

[In our own institution, we have found JHOVE to be useful in identifying PDF files that have potential problems. Each problem for each source needs to be examined to decide if there is a preservation risk.]

Thursday, December 18, 2014

In an All-Digital Future, It’s the New Movies That Will Be in Trouble.

In an All-Digital Future, It’s the New Movies That Will Be in Trouble. Bilge Ebiri. New York Media. December 16, 2014.
In 2007, researchers forecast that around 50 percent of the world’s movie screens would be digital by 2013. By the end of 2013, the figure was closer to 90 percent. In a short time, film has gone from an industry standard to a novelty.
Digital seemed by far the best option, but for long term preservation it has turned into "something of a catastrophe". “At this time, the longevity of digital files of moving images is anybody’s guess. We do know that it is much, much shorter than the longevity of photochemical film. If hard drives aren’t occasionally turned on, he notes, they start to become unusable."

Two famous examples of the perils of digital preservation:
  1. when the makers of Toy Story attempted to put their film out on DVD a few years after its release, they discovered that much of the original digital files of the film had been corrupted. 
  2. A similar fate came close to befalling Toy Story 2 when someone accidentally hit a “delete” button.
The irony of the digital revolution: It’s the newer movies that are in trouble. For content that was born in digital form, "all we can do is migrate the digital files as often as possible.” That requires technology and resources that go beyond what most organizations are able to handle.

The physical deterioration of drives and discs and chips isn’t the only thing digital filmmakers need to worry about. Digital files are also prone to become outdated, with software upgrades and new programs that render previous ones obsolete or unusable. Formats may be changing every 18 months to two years and may not be compatible with each other.

Part of the problem is that preservation isn’t a for-profit endeavor endeavor, so many do not want to spend a lot of money and space to preserve resources. But it becomes more important when considering the long term view.  “There’s this notion, which is not true, that digital is very inexpensive. Filmmakers and studios are saving a lot of money in production and post-production costs because of digital, and that’s a good thing. But because of that, many people don’t really understand that they’re putting their assets at risk by wholesale transferring to digital and then not keeping the originals.”

“This is not a new problem. In the 1970s and '80s, some film companies took all of their motion-picture film and transferred it to ¾-inch video, which was thought of as a preservation medium. They threw away their originals! And ¾-inch video was not a good format. In fact, it was a terrible format! This is happening with digital now. They’ve already sloughed off their nitrate collections, and there are actually discussions in some of the studios to get rid of their 35mm collections as well.”

However, film may not be as dead as some seem to think. Some archives have discussed manufacturing film themselves, if and when companies like Kodak or Agfa or Fuji go out of business. Sooner or later, there will be other strategies for the long-term preservation of digital material. “I even saw someone discussing the idea of shooting it all up into space and then waiting for it to come back around again,” he says. “That sounded like pure science-fiction, but who knows?”

Large studios are making sure that all the digital files associated with a multi-billion-dollar movie will be duplicated many times and securely placed in multiple locations. Others may not have the resources to preserve the content. Some relevant questions to ask:
  •  What will happen to them over the course of what is sure to be multiple format changes? 
  • Is somebody making sure their hard drives and the files are still usable? 
  • Have they been distributed into multiple locations? 
  • Will their producers and distributors remain solvent enough over the years to care for the content?
The story of cinema is the story of discovery. Movies once considered afterthoughts can, over time, become beloved classics. A print of a film long forgotten might turn up in a foreign archive and get revived. That may not be possible in an all-digital future, where moving-image files will need regular maintenance and upgrades to keep them viable. A forgotten movie, in other words, will be an extinct movie. 

Celluloid is far from a perfect medium, but it can survive even if some frames or reels are damaged or missing.  Not unlike with books, the simplicity of the physical medium held the key to its longevity.


Sunday, November 23, 2014

Digital Preservation File Format Policies of ARL Member Libraries: An Analysis

Digital Preservation File Format Policies of ARL Member Libraries: An Analysis. Kyle Rimkus et al. D-Lib Magazine. March/April 2014.

Repository managers often create a smaller set of formats to simplify management; the formats vary by institutions. Many institutions have a migration strategy to migrate digital objects from the great multiplicity of formats used to create digital materials to a smaller, more manageable number of standard formats that can still encode the complexity of structure and form of the original.

Open file formats are generally preferred to closed, proprietary formats because the way they encode content is transparent. On the other hand, adoption of a proprietary file format by a broad community of content creators, disseminators and users, is often considered a reliable indicator of that format's longevity. Additional qualities such as complexity, the presence of digital rights management controls, and external dependencies are also seen as relevant factors to consider when assessing file formats for preservation. There is, however, no failsafe formula for file format policy decisions. Here are some of the formats that are mos mention in preservation policies:

The five most commonly occurring file formats in all policies:
  1. Tagged Image File Format (extension TIFF, or TIF) (115),
  2. Waveform Audio File Format (WAV) (80), 
  3. Portable Document Format (PDF) (74), 
  4. JPEG (JPG, JPEG) (70), and 
  5. Plain text document (TXT, ASC) (69). 
The five most frequently occurring file formats given High Confidence in all policies:
  1. Tagged Image File Format (TIFF, TIF) (88), 
  2. Plain text document (TXT, ASC) (52), 
  3. Portable Document Format (PDF) (49), 
  4. Waveform Audio File Format (WAV) (47), and 
  5. Extensible Markup Language (XML) (47). 
 The five most frequently occurring file formats given Medium Confidence in all policies:
  1. Quicktime (MOV, QT) (47), 
  2. Microsoft Excel (XLS) (39), 
  3. Microsoft Word (DOC) (38), 
  4. Microsoft Powerpoint (PPT) (38), and 
  5. RealAudio (RAM, RA, RM) (35).

Friday, September 26, 2014

Library of Congress Recommended Format Specifications: Encouraging Preservation Without Discouraging Creation

Library of Congress Recommended Format Specifications: Encouraging Preservation Without Discouraging Creation. Theron Westervelt. Library of Congress. D-Lib Magazine September/October 2014.
The Library of Congress has relied upon the specifications included in the Copyright regulation known as the 'Best Edition Statement', a hierarchy of preference between certain physical characteristics in creative works, and its digital format sustainability.
The Library has devised the Recommended Format Specifications to enable it to identify what formats will most easily lend themselves to preservation and long-term access, especially with regard to digital formats. This was also done to provide guidance to its staff in their work of acquiring content for its collection and to  share with other stakeholders that have a need and interest in preservation and access. To ensure ongoing accuracy and relevancy, the Library of Congress will be reviewing and revising the specifications on an annual basis and welcomes feedback and input from all interested parties.

The Recommended Format Specifications are not intended to answer all questions raised in preserving and providing long-term access to creative content. They are to provide guidance on identifying sets of formats which are not drawn so narrowly as to discourage creators from working within them, but will instead encourage creators to use them to produce works in formats which will make preserving them and making them accessible simpler. They also are to identify the characteristics of creative works which best enable them to last and to be accessible in the long-term.

Saturday, March 29, 2014

Recommended Format Specifications

Recommended Format Specifications. Library of Congress. March 2014.
Recommended Format Specifications are hierarchies of the physical and technical characteristics of creative formats, both analog and digital, which will best meet the needs of all concerned, maximizing the chances for survival and continued accessibility of creative content well into the future.

There are two primary purposes of the specifications. One purpose of the specifications is to provide internal guidance within the Library to help inform acquisitions of collections materials (other than materials received through the Copyright Office). A second purpose is to inform the creative and library communities on best practices for ensuring the preservation of, and long-term access to, the creative output of the nation and the world.
Six broad categories of creative output, and particular format specifications in descending order of preference.
  • Textual Works and Musical Compositions
  • Still Image Works
  • Audio Works
  • Moving Image Works
  • Software and Electronic Gaming and Learning
  • Datasets/Databases
Format Specifications: PDF

Friday, June 14, 2013

EPUB for archival preservation: an update

EPUB for archival preservation: an update. Johan van der Knijff's blog on Open Planets.
In 2012  the KB released a report on the suitability of the EPUB format for archival preservation. A substantial number of EPUB-related developments have happened since then, and as a result some of the report's findings and conclusions have become outdated, particularly the observations on EPUB 3, and the support of EPUB by characterisation tools. This blog post provides an update to those findings :
  • Use of EPUB in scholarly publishing
  • Adoption and use of EPUB 3
  • EPUB 3 reader support
  • Support of EPUB by characterisation tools
The use of EPUB is increasing and a number of publishers are all using EPUB 2. Also, a number of organisations representing the publishing industry support EPUB 3, though the actual use of EPUB 3 is still limited.The 2012 report concluded that EPUB was not optimally supported by characterisation tools. This situation has improved quite a lot since that time. EPUB is now included in PRONOM, and DROID.  Overall, EPUB's credentials as a preservation format appear to have improved quite a bit over the last year.


EPUB for archival preservation

EPUB for archival   preservation. Johan van der Kniff. KB/National Library of the Netherlands. 20 July 2012. 
The EPUB format has become increasingly popular in the consumer market. A number of publishers have indicated their wish to use EPUB for supplying their electronic publications to the KB. This document looks at the characteristics and functionality of the format, and whether or not it is suitable for preservation.  Conceptually, an EPUB file is just an ordinary ZIP archive which includes one or more XHTML files, in one or more directories.  Cascading Style Sheets are used to define layout and formatting. A number of XML files provide metadata.

EPUB has a number of strengths that make it attractive for preservation. It is an open format that is well documented, and there are no known patents or licensing restrictions. The format's specifications are freely available. It is largely based on well‐established and widely‐used standards so it scores high marks for transparency and re‐usability. For situations where authenticity is crucial (e.g. legal documents) all or parts of a document can be digitally signed. Also, EPUB 2 is a popular format with excellent viewer support, including several open source implementations. There is concern that its role is limited because the current e‐book market is dominated by proprietary formats. And EPUB3 is currently less stable. There is a chart of recommendations for using EPUB.



Saturday, May 11, 2013

PDF/A, PDF for Long-term Preservation.

PDF/A, PDF for Long-term Preservation. Library of Congress.  March 21, 2013.
This section on PDF/A is part of the Library of Congress website on sustainable formats. The page includes description of PDF/A, sustainability factors, quality and functionality factors, format specifications, and useful references.

PDF/A is a family of ISO standards that attempt provide sustainable formats, through device independence, self-containment, and self-documentation. The PDF/A standards are developed and maintained by a working group with representatives from government, industry, and academia and active support from Adobe Systems Incorporated.

PDF/A-1, the first PDF/A standard, was based on PDF version 1.4 and published in 2005.
PDF/A-2 extends the capabilities of PDF/A-1 and is based on PDF version 1.7.
PDF/A-3 allows including in a PDF/A file, other types of files in any other format, not just other PDF/A files.

Restrictions on PDF/A files include:
  • Audio and video content are forbidden
  • Javascript and executable file launches are prohibited
  • All fonts must be legally embeddable for unlimited, universal rendering
  • Colorspaces specified in a device-independent manner
  • Encryption is disallowed
  • Use of standards-based metadata is mandated
The PDF/A standards define levels of conformance: conformance level A satisfies all requirements in the specification; level B and level U are lower levels of conformance, still satisfying the requirements of ISO 19005 regarding the visual appearance of electronic documents, but less demanding as to representation of structural or semantic properties.



Saturday, March 23, 2013

Digital Curation Bibliography

Digital Curation Bibliography: Preservation and Stewardship of Scholarly Works, 2012 Supplement. Charles W. Bailey, Jr. March 2013.

Bibliography: Preservation and Stewardship of Scholarly Works, 2012 Supplement, which presents over 130 English-language articles, books, and technical reports published in 2012 about digital curation and preservation, copyright issues, digital formats (e.g., media, e-journals, research data), metadata, models and policies, national and international efforts, projects and institutional implementations, research studies, services, strategies, and digital repository concerns.
It is a supplement to the Digital Curation Bibliography:Preservation and Stewardship of Scholarly Works, which covers over 650 works published from 2000 through 2011.
 

How big is the sound of music?

How big is the sound of music?  Lucas Mearian. Computerworld. March 21, 2013. 

Recently audiophiles and musicians have been moving toward master-quality music that's playable from a hard drive. That has led to greater use of lossless file formats. A popular file format, or codec, is the MP3.  This is a compressed file format; it is referred to as "lossy," meaning data is lost in the translation from the original master to the compressed format. Analog audio is recorded by sampling it 44,100 times per second, and then the samples are used to reconstruct the audio signal when playing it back digitally. An uncompressed file on a CD for example, uses 44.1KHz or a 1,411Kbits of data per second (Kbps) while a compressed file may only offer a bit rate of up to 256Kbps, which results in lower quality.  Within file formats, there are many sampling rates or frequencies; the higher the sampling rate, the higher the sound quality.

Uncompressed files are often stored as WAV files (Waveform Audio File Format), which can typically be 10 - 40 times larger than MP3 files.Other lossless formats include FLAC (Free Lossless Audio Codec), AIFF (Audio Interchange File Format) and Apple's ALAC (Apple Lossless Audio Codec). These lossless file formats require less storage space than WAV files. These new lossless formats can save disk space and offer high-fidelity music playback. For example, an album in the WAV format make take up 640 MB of space; the same album would take up about 300 MB in the lossless FLAC format. And lossy MP3 file would take up about 60 MB. It is estimated that CDs only offer about 15% of the data that was in a master sound track; when that CD is further compressed into a lossy MP, even more depth and quality of a recording is lost.

A relatively new high-definition file format, called Direct-Stream Digital (DSD), was created by Sony and Philips.  DSD uses a sample rate of 2.8224MHz or 64 times that of a CD's 41.1KHz.
 

Friday, May 4, 2012

Library of Congress Digital Preservation Newsletter.

Library of Congress Digital Preservation Newsletter. May 2012. [PDF]
Items from the Newsletter include:
  • Key outcomes of the NDIIPP program are to identify priorities for born digital collections and engage organizations committed to preserving digital content.
  • Viewshare  is being used for the collections
  • Floppy Disks are Dead, Long Live Floppy Disks
    • Floppy disks are fragile constructions that were never designed for permanence.
    • Difficult to determine what is on the floppy and to recover
    • A floppy disk controller called Catweasel allows computers to access a wide variety of older disk formats (must have the floppy drive).
  • Web archiving.  
    • Because of the scope of the web sites, consider partnering with other institutions.
  •  Preservation of and Access to Federally Funded Scientific Data
    • Research data produced by federally funded scientific projects should be freely available to the wider research community and the public
    • Public data should be a public resource, and data sharing supports core scientific values like openness, transparency, and replication. 
    • Lack of resources for curating scientific data and a lingering tradition of data hoarding create resistance to open access to research data.

Sunday, October 16, 2011

Digital Preservation-Friendly File Formats for Scanned Images.

Digital Preservation-Friendly File Formats for Scanned Images.  Bill LeFurgy. The Signal. October 12, 2011.
Some digital file formats are better for preservation than others.  The best format for preservation is one where the content can be viewable accurately regardless of changes in hardware, software or other technical changes. The Library of Congress has created a web resource to help in selecting file formats, and which will help in understanding how effective formats for long-term preservation.
  • Disclosure of specifications and tools for validating technical integrity
  • Adoption by the primary creators and users of information resources
  • Openness to direct basic and non-propriety tools
  • Self-documentation of metadata needed to render the data as usable information or understand its context
  • Degree to which the format depends on specific hardware, operating system, or software for rendering the information and how difficult that may be.
  • Extent that licenses or patents may inhibit the ability to sustain content.
  • Technical protection mechanisms. Embedded capabilities to restrict use in order to protect the intellectual property.
 Using these factors has helped determine formats that may be more sustainable than others.