The PREMIS of the UCSD DAMS Arwen Hutt

The PREMIS of the UCSD DAMS Arwen Hutt & Bradley D. Westbrook Metadata Analysis and Specification Unit UCSD Libraries For PREMIS Workshop La Jolla, CA, 11 Feb 2008

Local Context UCSD Libraries’ Digital Content ◦ Digital production distributed throughout the libraries (MSCL, SIO, AAL, etc. ) ◦ Projects dating from the mid-nineties ◦ Metadata (descriptive & technical) varies ◦ Formats are fairly, but not completely, homogenous; primarily images at this point, but also text, audio and video. UCSD Libraries’ DAMS ◦ Bring together Libraries’ digital objects to facilitate management ◦ Normalize metadata

Arriving at PREMIS Problem of Technical Metadata ◦ Common semantic units encoded/stored in many different ways (both standard and local) ◦ Simplify management ◦ Support format specific metadata Choice of PREMIS ◦ Express non format specific metadata ◦ (Current) management procedures utilize the same elements regardless of file format ◦ Extensible for supporting future additional management functions

Object Requirements METS Profiles ◦ ◦ Codify requirements for the DAMS Simple Object Profile & Complex Object Profile PREMIS tech. MD section required Additional, tech. MD sections optional format specific metadata MIX Audio Spec / Guidelines (potential)

Required PREMIS Elements Required: pre/object. Identifier/object. Identifier. Type pre/object. Identifier/object. Identifier. Value pre/object/preservation. Level pre/object. Category (file) pre/object. Characteristics/fixity/message. Digest. Algorithm pre/object. Characteristics/fixity/message. Digest pre/object. Characteristics/size pre/object. Characteristics/format. Name pre/object/creating. Application/date. Created. By. Application Encouraged, but not required: pre/object/storage. Medium pre/object. Characteristics/format. Designation/format. Version pre/object/creating. Application. Name ◦ pre/object/original. Name ◦ ◦ ◦ ◦

Implementing PREMIS Where does it come from? ◦ Automated extraction and recording (jhove) ◦ Taken from legacy metadata (either recorded in house or vendor supplied) Management Functions ◦ Authenticity verification Replication of files to CDL’s DPR ◦ Format migration

Limitations of the DAMS’ PREMIS Use only base level object assertions No use of event, agent, or rights assertions