Blogs: validation

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Save the date! Thursday 27 April During our second online hack day we’d like to improve JHOVE by: creating or extending descriptions of JHOVE validation errors; reviewing and where possible, improving the existing documentation; gathering example files that demonstrate particular validation issues for testing; and, documenting the preservation impact of different JHOVE validation issues and what […]

By Becky, posted in Becky's Blog

27th Apr 2017  8:00 AM  0 Reads  No comments

Organisations that use JHOVE for PDF validation will already be familiar with the number of error messages it reports. The recently released JHOVE v1.16 Release Candidate (RC) includes a couple of my bug fixes for the PDF module which appear to reduce this number significantly. These fixes were the result of investigating “Invalid Page Dictionary Object” errors and […]

By Peter May, posted in Peter May's Blog

10th Mar 2017  2:23 PM  572 Reads  No comments

The aim of the workshop is to highlight the importance of standardisation and file format validation for the long term preservation of digital cultural content, present the open source conformance checkers developed in the project and the business models that can be built around them, and involve memory institutions outside the PREFORMA consortium in testing, […]

By Becky, posted in Becky's Blog

7th Mar 2017  12:00 AM  0 Reads  No comments

Many factors contribute to the long-term preservation of and access to digital collections. And typically, the endpoint for this material is a repository—or other type of preservation system. But what happens to content after it is stored? How do digital preservationists ensure that content is correct and valid when ingested as well as remains unchanged […]

By caylinsmith, posted in caylinsmith's Blog

23rd Jan 2017  12:57 PM  924 Reads  1 Comment

In my previous blog post I addressed the detection of broken audio files in an automated workflow for ripping audio CDs. For (data) CD-ROMs and DVDs that are imaged to an ISO image, a similar problem exists: how can we be reasonably sure that the created image is complete? In this blog post I will […]

By johan, posted in johan's Blog

13th Jan 2017  3:30 PM  2733 Reads  5 Comments

At the KB we have a large collection of offline optical media. Most of these are CD-ROMs, but we also have a sizeable proportion of audio CDs. We’re currently in the process of designing a workflow for stabilising the contents of these materials using disk imaging. For audio CDs this involves ‘ripping’ the tracks to […]

By johan, posted in johan's Blog

4th Jan 2017  2:38 PM  834 Reads  3 Comments

Last week I attended the PREFORMA Experience Workshop in Berlin. The Open Preservation Foundation and PDF Association are leading veraPDF. The morning focused on use cases for conformance checkers from memory institutions and the afternoon explored the PREFORMA challenge with an overview of the testing phase which starts in January 2017. This was followed by […]

By Becky, posted in Becky's Blog

2nd Dec 2016  7:31 AM  558 Reads  No comments

Following the successful Open Source Workshop, organised in Stockholm in April this year, the PREFORMA project invites all the members of the digital preservation community to attend the Experience Workshop – Improving long-term digital preservation, which will be held in Berlin on November 23, 2016. The aim of the workshop is to demonstrate the use of the conformance […]

By Becky, posted in Becky's Blog

23rd Nov 2016  12:00 AM  0 Reads  No comments

On 11th October we held our first JHOVE online hack day. Our aim was to catalogue error messages produced by JHOVE to get a better understanding of their meaning and potential preservation impact. Background: organising an online hack day We have been considering running online hackathons because attending face-to-face events has become more difficult as […]

By Becky, posted in Becky's Blog

19th Oct 2016  10:06 AM  816 Reads  No comments

JHOVE is a great tool for validating content, such as PDFs, however much of the validation output given is difficult to understand. The aim of this online hack day is to enhance our knowledge about JHOVE errors – to create descriptions of errors and to identify example files, as well as to start to understand […]

By Becky, posted in Becky's Blog

11th Oct 2016  12:00 AM  0 Reads  No comments