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Category Archives: Fedora

Fedora open source software gives organizations a flexible service-oriented architecture for managing and delivering their digital content. At its core is a powerful digital object model that supports multiple views of each digital object and the relationships among digital objects. Digital objects can encapsulate locally-managed content or make reference to remote content. Dynamic views are possible by associating web services with objects. Digital objects exist within a repository architecture that supports a variety of management functions. All functions of Fedora, both at the object and repository level, are exposed as web services. These functions can be protected with fine-grained access control policies. This unique combination of features makes Fedora an attractive solution in a variety of domains. Some examples of applications that are built upon Fedora include library collections management, multimedia authoring systems, archival repositories, institutional repositories, and digital libraries for education.

Disseminators As the Core of an Object Repository

I’ve been working to get JBoss Seam tied into Fedora, and along the way thought it would be wise to stop and document a core concept of this integration: the centrality of Fedora Disseminators in the the design of the Ohio Digital Resource Commons. Although there is nothing specific to JBoss Seam (a Java Enterprise Edition application framework) in these concepts, making an object “render itself” does make the Seam-based interface application easier to code and understand. A disseminator-centric architecture also allows us to put our code investment where it matters the most — in the repository framework — and exploit that investment in many places. So what does it mean to have a disseminator-centric architecture and have objects “render themselves”?

This is a preview of Disseminators As the Core of an Object Repository. Read the full post (1859 words, 13 images, estimated 7:26 mins reading time)
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2007 04 26 Comments (0)

Presentation Summary: “MPTStore: Implementing a fast, scalable, and stable RDBMS-backed triplestore for Fedora and the NSDL”

Chris Wilper gave this presentation on behalf of the work that he and Aaron Birkland did to improve the performance of the Fedora Resource Index.

Version 2.0 of the Fedora digital object repository software added a feature called the Resource Index (RI). Based on Resource Description Framework (RDF) triples, the RI provided quick access to relationships between objects as well as to the descriptive elements of the object itself. After about two years of use using the Kowari software, the RI has pointed to a number of challenges for “triplestores”: scalability (few triplestores are designed for greater than 100 million triples); performance; and stability (frequent “rebuilds”).

This is a preview of Presentation Summary: “MPTStore: Implementing a fast, scalable, and stable RDBMS-backed triplestore for Fedora and the NSDL”. Read the full post (600 words, estimated 2:24 mins reading time)
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2007 01 29 Comments (5)

A Vision for FEDORA’s Future, an Implementation Plan to Get There, and a Project Update

This morning, Sandy Payette of Cornell University and FEDORA project co-director, gave an update on the FEDORA project including a statement of a vision for FEDORA’s future, information about the emerging FEDORA Commons non-profit, and a status report/roadmap for the software itself. Below is a summary based on my notes of Sandy’s comments and slide content.

Vision for FEDORA’s Future

From her perspective, Sandy sees many kinds of projects using FEDORA, and she sees them fall into these general categories: Scholarly Workbenches — capturing, managing and publishing the process of scholarship; Linking Data and Publications — complex objects built up of relationships with different types of internal and external objects; Reviews and Annotations of Objects — blogs and wikis on top of information spaces; collaborations surrounding a repository object; and Museum Exhibits with K-12 Lesson Plans.

This is a preview of A Vision for FEDORA’s Future, an Implementation Plan to Get There, and a Project Update. Read the full post (1081 words, estimated 4:19 mins reading time)
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2007 01 24 Comments (13)

Open Repositories Presentation: Building an IR Interface Using EJB3 and JBoss Seam

Below is the outline of the Ohio DRC presentation from today’s FEDORA session at Open Repositories conference. Comments welcome!

This is a preview of Open Repositories Presentation: Building an IR Interface Using EJB3 and JBoss Seam. Read the full post (107 words, estimated 26 secs reading time)
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2007 01 23 Comments (2)

Building an Institutional Repository Interface Using EJB3 and JBoss Seam

This tour is designed to show the overall architecture of a FEDORA digital object repository application within the JBoss Seam framework while at the same time pointing out individual design decisions and extension points that are specific to the Ohio Digital Resource Commons application. Geared towards software developers, a familiarity with Java Servlet programming is assumed, although not required. Knowledge of JBoss Seam, Hibernate/Java Persistence API, EJB3 and Java EE would be helpful but not required; brief explanations of core concepts of these technologies are included in this tour.

The tour is based on revision 709 of /drc/trunk and was last updated on 18-Jan-2007.

This is a preview of Building an Institutional Repository Interface Using EJB3 and JBoss Seam. Read the full post (2005 words, estimated 8:01 mins reading time)
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2007 01 18 Comments (2)

Looking Forward to Version 2.2 of FEDORA

Sandy Payette, Co-Director of the Fedora Project and Researcher in the Cornell Information Science department, announced a tentative date for the release 2.2 of the FEDORA digital object repository.

The Fedora development team would like to announce that Fedora 2.2 will be released on Friday, January 19, 2007.

This new release will contain many significant new features and enhancements, including [numbers added to the original for the sake of subsequent commentary]:

  1. Fedora repository is now a web application (.war) that can be installed in any container
  2. Fedora authentication has been refactored to use servlet filters (no longer Tomcat realms)
This is a preview of Looking Forward to Version 2.2 of FEDORA. Read the full post (983 words, estimated 3:56 mins reading time)
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2006 12 31 Comments (2)

Java Application for Batch Processing FEDORA Objects

We had a need today to transform an XML file with a custom DTD into Dublin Core; the custom XML file is a datastream in our FEDORA repository and we want to put the Dublin Core XML file back into the FEDORA object as the DC datastream. This took a slew of technologies and techniques: reading a datastream out of the FEDORA repository using API-A, parsing XML documents using the Java DOM library, creating a new document with the correct namespaces using Java DOM, and modifying the DC datastream in the repository using API-M.

This is a preview of Java Application for Batch Processing FEDORA Objects. Read the full post (131 words, estimated 31 secs reading time)
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2006 12 13 Comments (1)

Sakai gets JSR-170 support; possible integration point with FEDORA?

Earlier this year, I was on a quest to hook a FEDORA content repository into the Sakai collaboration and learning environment. What looked at first to be a fairly easy integration turned out to be rather complicated and I set the project aside for another time. Today brings word from Ian Boston of a JSR-170 implementation in Sakai:

This is a preview of Sakai gets JSR-170 support; possible integration point with FEDORA?. Read the full post (255 words, estimated 1:01 mins reading time)
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2006 11 08 Comments (0)

Colorado Alliance of Research Libraries to build a consortial repository using FEDORA

On Friday, the Colorado Alliance of Research Libraries announced the creation of a consortium-wide digital repository project similar to that of the Ohio Digital Resource Commons.

Colorado Alliance Digital Repository Project Approved

The Board of Directors of the Colorado Alliance of Research Libraries has approved initial funding for a consortium-wide digital repository project at its October 19, 2006 meeting.

The Board of Directors of the Colorado Alliance of Research Libraries has approved initial funding for a consortium-wide digital repository project at its October 19, 2006 meeting. The project will use the Fedora open source software which was selected after a long evaluation process by the Institutional Repository Implementation Team, chaired by John Culshaw from the University of Colorado at Boulder.

This is a preview of Colorado Alliance of Research Libraries to build a consortial repository using FEDORA. Read the full post (215 words, estimated 52 secs reading time)
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2006 10 25 Comments (1)

GSoC: JPEG2000 JPIP Server and Viewer Applet

OhioLINK was excited and privileged to participate in the second annual Google Summer of Code — a program to inspire young developers and provide students in Computer Science and related fields the opportunity to do work related to their academic pursuits during the summer, and to support existing open source projects and organizations. This is the first of three posts summarizing the efforts of three students; this one details the work of Juan Pablo Garcia Ortiz, a Ph.D. candidate at the University of Almeria in Spain, to build a JPEG2000 JPIP Streaming Server and Client Browser Viewer Applet. This is an edited version of his final report.

This is a preview of GSoC: JPEG2000 JPIP Server and Viewer Applet. Read the full post (1979 words, estimated 7:55 mins reading time)
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2006 10 03 Comments (8)
From the Disruptive Library Technology Jester (http://dltj.org/), printed on Thursday the 22nd of May 2008 at 4:09:29 PM EDT (-0400). The URL to this page is http://dltj.org/category/fedora-dr/

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