Digital Library Blog

DLSS has released the source code for two of its library infrastructure projects:

Argo, Stanford's administrative "hydra head" for Fedora, provides a viewing, reporting and administrative interface for objects in a Fedora repository. It is also coupled with Stanford's lightweight and engine-free workflow system ("WorkDo") to provide a workflow visualization and control mechanism. WorkDo is a Hydra- and Fedora-compatible system that chains small scripts "robots" and microservices into complex processes to complete both human- and machine-based task flows.

dor-services is a Ruby gem that exposes Stanford’s Fedora-based Digital Object Registry (DOR) services and content models to both Hydra and non-Hydra processes. In addition to functional access to DOR’s Registration, Workflow, Identifier, Search, Metadata, Digital Stacks, and Preservation Ingest services, the dor-services library also defines a number of discrete modules that can be mixed into Hydra object models to extend their functionality. Each module is named according to a salient characteristic that it imparts to a digital object, and defines both object methods (what the object can do) as well as expectations (what metadata the object needs to provide) in order to properly represent that characteristic.

The latest version of the Stanford University Libraries and Academic Information Resources Quality Assurance Image Defects page is now “live” and made freely available to the cultural heritage and library communities.

This is a long-awaited tool that serves a range of production, development, and training needs. It includes sample images of common (and uncommon) defects, causes/sources, and potential remedies.

https://lib.stanford.edu/digital-production-services/quality-assurance-image-defects

This page compliments the outstanding and hugely popular AV Artifact site that was produced by our own Stanford Media Preservation Lab team.

http://preservation.bavc.org/artifactatlas/index.php/Table_of_Contents

Future work on the Image Defects page will include contributions from Imaging Scientist Don Williams, and content from the Library of Congress and Federal Agencies Digitization Guidelines Initiative.

The International Image Interoperability Framework (http://lib.stanford.edu/iiif) is an initiative driven by several major research and national libraries to enable the rich and robust delivery of digital images through common interfaces, and to spur the development of open source and commercial software solutions in this space.

The IIIF Working Group invites comment and feedback on a proposed API for the the delivery of images via a standard http request. The full specification can be found at:

http://library.stanford.edu/iiif/image-api

The IIIF Image API specifies a web service that returns an image in response to a standard http or https request. The URL can specify the region, size, rotation, quality characteristics and format of the requested image. A URL can also be constructed to request basic technical information about the image to support client applications.