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Information for Technologists

Software and Services
External linkJHOVE2
A next-generation framework and application for format-aware characterization, building on the succcess of the original JHOVE system. JHOVE2 generalizes the process of characterization to include signature-based identification, validation, feature extraction, and policy-based assessment.
External linkNOID (Nice Opaque Identifiers)
Noid provides minting, binding, and resolving services in support of preservation-ready identifiers. Persistent identifiers may be obtained by a committed provider with help from these kinds of identity services.
External linkSoftware download
External linkPairtrees for Collection Storage
Pairtree is a file system convention for the organization of a digital object store. Pairtrees have the advantage that many object operations, including backup and restore, can be performed with native operating system tools.
External linkSoftware download
off site EAD Resources
We've assembled some resources to help contributors to the Online Archive of California (OAC) with building and managing EAD finding aids.
External linkOAC Technical Information
Summarizes the technologies underlying the Online Archive of California (OAC) platform.
External linkCalisphere Technical Information
Summarizes the technologies underlying the Calisphere platform.
eXtensible Text Framework (XTF)
Commissioned by the California Digital Library (CDL) to be the primary access tool for its collections, the eXtensible Text Framework (XTF) provides a powerful, flexible platform for providing access to digital content.
Best Practices and Standards
External linkARK
A URL created to allow persistent, long-term access to information objects. This standard is related to UC Curation Center's Identity service.
off siteBagIt
One of the preservation transfer tools related to work in partnership with External linkNDIIPP.
External linkDublin Core [RFC 5013]
One of the standards that CDL has contributed to in partnership with NISO members.
CDL Guidelines for Digital Objects
Provides specifications for digital objects prepared by institutions for submission to CDL for preservation and access, through the CDL’s Merritt Digital Repository. It also provides specifications for METS digital objects to be contributed to the Online Archive of California (OAC).
CDL Digital File Format Recommendations
This document provides recommendations for creating durable production master files -- comprising images, texts, audio, and video content -- which are also suitable for long-term storage and the creation of appropriate derivative use copies.
CDL TEI Encoding Guidelines
Encoding guidelines produced by CDL's Structured Text Working Group.
External linkOnline Archive of California Best Practice Guidelines for EAD
These guidelines are used by content contributors when contributing EAD finding aids to the Online Archive of California (OAC).
Last updated: August 17, 2018
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