Islandora is an open-source software framework designed to help institutions and organizations and their audiences collaboratively manage, and discover digital assets using a best-practices framework.  Islandora was originally developed by the University of Prince Edward Island's Robertson Library, but is now implemented and contributed to by an ever-growing international community.

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kstapelfeldt's picture

What are Derivatives? Why do I care?

5 years 12 months

Me? I like the Federal Agencies Digitization Guidelines Initiative's definition for derivatives:

Often called service, access, delivery, viewing, or output files, derivative files are by their nature secondary items, generally not considered to be permanent parts of an archival collection. To produce derivative files, organizations use the archival master file or the production master file as a data source and produce one or more derivatives, each optimized for a particular use. Typical uses (each of which may require a different optimization) include the provision of end-user access; high quality reproduction; or the creation of textual representations via OCR or voice recognition. In many cases, the derivatives intended to serve end-user access employ lossy compression, e.g., JPEG-formatted images, MP3-formatted sound recordings, or RealMedia-formatted video streams. The formats selected for derivative files may become obsolete in a relatively short time.

Or, to be a little shorter and less precise, derivatives are copies of files in different formats that serve both archival and display purposes. In Islandora they are usually created when the asset is ingested into the repository, but they serve several purposes. Derivitives are a pretty standard approach when creating archival packages of content, and disseminating them to the public (for example, derivatives are usually a part of AIP, SIP, and DIP packages).*

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kvanekris's picture

What does Open Source mean for dgi?

6 years 2 days

Originally posted at

Many times when first talking to someone who is interested in Islandora I get the question “But what’s the difference between the Islandora Project and dgi?” I completely understand where this question comes from. We are located in the same city, have numerous employees who have worked for both the project and for discoverygarden, and we tend to talk about Islandora as if it’s ours at dgi. I think that we tend to talk about Islandora as if it’s ours because it becomes everyone’s project as soon as they’ve starting working with it and contributing to it. Everyone can take a little bit of ownership to an open source project.

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kstapelfeldt's picture

Community Contributors We Know & Love: The Nick Ruest Edition

6 years 1 week

If you're landing on this post, then you probably already know the strengths and challenges of an open-source approach to software development. With Islandora, we strive to maximize the strengths, and meet the challenges. But, let's face it - any open-source project can only ever be as good as its contributors.

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