This paper describes the aDORe repository architecture, designed and implemented for ingesting, storing, and accessing a vast collection of Digital Objects at the Research Library of the Los Alamos National Laboratory. The aDORe architecture is highly modular and standards-based. In the architecture, the MPEG-21 Digital Item Declaration Language is used as the XML-based format to represent Digital Objects that can consist of multiple datastreams as Open Archival Information System Archival Information Packages (OAIS AIPs). Through an ingestion process, these OAIS AIPs are stored in a multitude of autonomous repositories. A Repository Index keeps track of the creation and location of all the autonomous repositories, whereas an Identifier Locator registers in which autonomous repository a given Digital Object or OAIS AIP resides. A front-end to the complete environment – the OAI-PMH Federator – is introduced for requesting OAIS Dissmination Information Packages (OAIS DIPs). These OAIS DIPs can be the stored OAIS AIPs themselves, or transformations thereof. This front-end allows OAI-PMH harvesters to recurrently and selectively collect batches of OAIS DIPs from aDORe, and hence to create multiple, parallel services using the collected objects. Another front-end – the OpenURL Resolver – is introduced for requesting OAIS Result Sets. An OAIS Result Set is a dissemination of an individual Digital Object or of its constituent datastreams. Both front-ends make use of an MPEG-21 Digital Item Processing Engine to apply services to OAIS AIPs, Digital Objects, or constituent datastreams that were specified in a dissemination request.
Thursday, February 24, 2005
aDORe: a modular, standards-based Digital Object Repository by Herbert Van de Sompel, Jeroen Bekaert, Xiaoming Liu, Luda Balakireva, and Thorsten Schwander. Draft of Submission to Oxford University Press Computer Journal.
at 10:05 AM
Wednesday, February 23, 2005
Here in the states we have Lisjobs.com. For the UK a good place to seek employment and advise is Jinfo (pronounced Jin-fo), a database of information-related job vacancies.As well as the database, there is the free Jinfo Newsletter published twice-monthly, by email.The Jinfo Newsletter lists the latest job vacancies, along with career advice and job searching tips, from information-industry recruitment consultants.Recent Jinfo Newsletter articles have included:
- The Importance of a CVThe Wonderful World of InformationThe Benefits of Mentoring
Given the publication lag the authors have slightly updated the paper: Metadata Switch: Thinking About Some Metadata Management and Knowledge Organization Issues in the Changing Research and Learning Landscape. Forthcoming in LITA Guide to E-Scholarship [working title], ed. Debra Shapiro. February 2005 preprint (PDF:824K/25pp.).
The academic library is not an end in itself. It supports research, learning and scholarship, and it must adapt as research and learning behaviors change in a network environment. This paper briefly considers some of these issues, and takes them as its context, but quickly moves to a very specific emphasis. It considers how such library responses create new metadata management and knowledge organization questions, and it then outlines some of the work in OCLC Research which responds to these issues.This paper presents a matrix based on stewardship and uniqueness for considering the materials in our collections.
at 8:59 AM
Tuesday, February 22, 2005
This Friday I'll be in Dallas for the Open Source Software in Libraries workshop. I'm looking forward to that. I've decided to spend the weekend in Dallas and see the sights. I've lived in Texas for 25 years and have yet to spend any time in Dallas. Any suggestions on things to see or do there? There is no contra dance nor English Country dance this weekend. Any easy international folk dancing? The symphony is playing but the apart from the hall I'm not very interested. The program is only OK and after the Houston Symphony the playing will be second-best. Any good chamber music? Any interesting libraries open on the weekend? I'll have Friday night, Saturday and Sunday morning. TIA. I don't expect to be posting anything on Friday.
at 1:35 PM
It appears I now not clear in my posting about the TMEA conference. I feel it is neither good nor bad, just different. It was a very different conference than library conferences. Something we should keep in mind is that not everybody uses nor needs technology. These folks can do their thing very successfully with very little recourse to information technology, and libraries for the matter. Sure they do have to do some music history instruction that requires books but the making of music and dance does not require much in the way of tech. It is a joke among some of the music teachers that they threaten the kids with getting out the books to get them to behave. Music theory in later grades requires textbooks, but most of the better elementary music teachers use books and technology very little.
at 10:48 AM
Macgregor, George (2003) Collection-level descriptions: metadata of the future?. Library Review 52(6):pp. 247-250.
The potential for digital library growth has recently drawn into question the ability of users to navigate large distributed and heterogeneous collections. This column attempts to summarise some of the potential benefits to be derived through the implementation of collection-level descriptions for both user resource discovery and institutional collection management. In particular, the concept of "functional granularity" is introduced and some related issues are briefly explored.
at 10:44 AM