CA Describes efforts undertaken at the National Library of New Zealand to ensure preservation of electronic resources.
Phrases
<P1> The National Library Act 1965 provides the legislative framework for the National Library of New Zealand '... to collect, preserve, and make available recorded knowledge, particularly that relating to New Zealand, to supplement and further the work of other libraries in New Zealand, and to enrich the cultural and economic life of New Zealand and its cultural interchanges with other nations.' Legislation currently before Parliament, if enacted, will give the National Library the mandate to collect digital resources for preservation purposes. <warrant> (p. 18) <P2> So, the Library has an organisational commitment and may soon have the legislative environment to support the collection, management and preservation of digital objects. ... The next issue is what needs to be done to ensure that a viable preservation programme can actually be put in place. (p. 18) <P3> As the Library had already begun systematising its approach to resource discovery metadata, development of a preservation metadata schema for use within the Library was a logical next step. (p. 18) <P4> Work on the schema was initially informed by other international endeavours relating to preservation metadata, particularly that undertaken by the National Library of Australia. Initiatives through the CEDARS programme, OCLC/RLG activities and the emerging consensus regarding the role of the OAIS Reference Model ... were also taken into account. <warrant> (p. 18-19) <P5> The Library's Preservation Metadata schema is designed to strike a balance between the principles of preservation metadata, as expressed through the OAIS Information Model, and the practicalities of implementing a working set of preservation metadata. The same incentive informs a recent OCLC/RLG report on the OAIS model. (p. 19) <P6> [I]t is unlikely that anything resembling a comprehensive schema will become available in the short term. However, the need is pressing. (p. 19) <P7> The development of the preservation metadata schema is one component of an ongoing programme of activities needed to ensure the incorporation of digital material into the Library's core business processes with a view to the long-term accessibility of those resources. <warrant> (p. 19) <P8> The aim of the above activities is for the Library to be acknowledged as a 'trusted repository' for digital material which ensures the viability and authenticity of digital objects over time. (p. 20) <P9> The Library will also have to develop relationships with other organisations that might wish to achieve 'trusted repository' status in a country with a small population base and few agencies of appropriate size, funding and willingness to take on the role.
Conclusions
RQ There are still a number of important issues to be resolved before the Library's preservation programme can be deemed a success, including the need for: higher level of awareness of the need for digital preservation within the community of 'memory institutions' and more widely; metrics regarding the size and scope of the problem; finance to research and implement digital preservation; new skill sets for implementing digital preservation, e.g. running the multiplicity of hardware/software involved, digital conservation/archaeology; agreed international approaches to digital preservation; practical models to match the high level conceptual work already undertaken internationally; co-operation/collaboration between the wider range of agents potentially able to assist in developing digital preservation solutions, e.g. the computing industry; and, last but not least, clarity around intellectual property, copyright, privacy and moral rights.
SOW
DC OAIS emerged out of an initiative spearheaded by NASA's Consultative Committee for Space Data Systems. It has been shaped and promoted by the RLG and OCLC. Several international projects have played key roles in shaping the OAIS model and adapting it for use in libraries, archives and research repositories. OAIS-modeled repositories include the CEDARS Project, Harvard's Digital Repository, Koninklijke Bibliotheek (KB), the Library of Congress' Archival Information Package for audiovisual materials, MIT's D-Space, OCLC's Digital Archive and TERM: the Texas Email Repository Model.
Type
Electronic Journal
Title
A Metadata Framework Developed at the Tsinghua University Library to Aid in the Preservation of Digital Resources
This article provides an overview of work completed at Tsinghua University Library in which a metadata framework was developed to aid in the preservation of digital resources. The metadata framework is used for the creation of metadata to describe resources, and includes an encoding standard used to store metadata and resource structures in information systems. The author points out that the Tsinghua University Library metadata framework provides a successful digital preservation solution that may be an appropriate solution for other organizations as well.
Notes
Well laid out diagrams show the structural layers of resources; encoding exampes are included also.
ISBN
1082-9873
DOI
10.1045/november2002-niu
Critical Arguements
CA The author delineates the metadata schema implemented at Tsinghua University Library which allows for resource description and preservation.
This is one of a series of guides produced by the Cedars digital preservation project. This guide concentrates on the technical approaches that Cedars recommends as a result of its experience. The accent is on preservation, without which continued access is not possible. The time scale is at least decades, i.e. way beyond the lifetime of any hardware technology. The overall preservation strategy is to remove the data from its medium of acquisition and to preserve the digital content as a stream of bytes. There is good reason to be confident that data held as a stream of bytes can be preserved indefinitely. Just as there is no access without preservation, preservation with no prospect of future access is a very sterile exercise. As well as preserving the data as a byte-stream, Cedars adds in metadata. This includes reference to facilities (called technical metadata in this document) for accessing the intellectual content of the preserved data. This technical metadata will usually include actual software for use in accessing the data. It will be stored as a preserved object in the overall archive store, and will be revised as technology evolves making new methods of access to preserved objects appropriate. There will be big economies of scale, as most, if not all, objects of the same type will share the same technical metadata. Cedars recommends against repeated format conversions, and instead argues for keeping the preserved byte-stream, while tracking evolving technology by maintaining the technical metadata. It is for this reason that Cedars includes only a reference to the technical metadata in the preserved data object. Thus future users of the object will be pointed to information appropriate to their own era, rather than that of the object's preservation. The monitoring and updating of this aspect of the technical metadata is a vital function of the digital library. In practice, Cedars expects that very many preserved digital objects will be in the same format, and will reference the same technical metadata. Access to a preserved object then involves Migration on Request, in that any necessary migration from an obsolete format to an appropriate current day format happens at the point of request. As well as recommending actions to be taken to preserve digital objects, Cedars also recommends the use of a permanent naming scheme, with a strong recommendation that such a scheme should be infinitely extensible.
Critical Arguements
CA "This document is intended to inform technical practitioners in the actual preservation of digital materials, and also to highlight to library management the importance of this work as continuing their traditional scholarship role into the 21st century."
This document provides some background on preservation metadata for those interested in digital preservation. It first attempts to explain why preservation metadata is seen as an essential part of most digital preservation strategies. It then gives a broad overview of the functional and information models defined in the Reference Model for an Open Archival Information System (OAIS) and describes the main elements of the Cedars outline preservation metadata specification. The next sections take a brief look at related metadata initiatives, make some recommendations for future work and comment on cost issues. At the end there are some brief recommendations for collecting institutions and the creators of digital content followed by some suggestions for further reading.
Critical Arguements
CA "This document is intended to provide a brief introduction to current preservation metadata developments and introduce the outline metadata specifications produced by the Cedars project. It is aimed in particular at those who may have responsibility for digital preservation in the UK further and higher education community, e.g. senior staff in research libraries and computing services. It should also be useful for those undertaking digital content creation (digitisation) initiatives, although it should be noted that specific guidance on this is available elsewhere. The guide may also be of interest to other kinds of organisations that have an interest in the long-term management of digital resources, e.g. publishers, archivists and records managers, broadcasters, etc. This document aimes to provide: A rationale for the creation and maintenance of preservation metadata to support digital preservation strategies, e.g. migration or emulation; An introduction to the concepts and terminology used in the influential ISO Reference Model for an Open Archival Information System (OAIS); Brief information on the Cedars outline preservation metadata specification and the outcomes of some related metadata initiatives; Some notes on the cost implications of preservation metadata and how these might be reduced.
Conclusions
RQ "In June 2000, a group of archivists, computer scientists and metadata experts met in the Netherlands to discuss metadata developments related to recordkeeping and the long-term preservation of archives. One of the key conclusions made at this working meeting was that the recordkeeping metadata communities should attempt to co-operate more with other metatdata initiatives. The meeting also suggested research into the contexts of creation and use, e.g. identifying factors that might encourage or discourage creators form meeting recordkeeping metadata requirements. This kind of research would also be useful for wider preservation metadata developments. One outcome of this meeting was the setting up of an Archiving Metadata Forum (AMF) to form the focus of future developments." ... "Future work on preservation metadata will need to focus on several key issues. Firstly, there is an urgent need for more practical experience of undertaking digital preservation strategies. Until now, many preservation metadata initiatives have largely been based on theoretical considerations or high-level models like the OAIS. This is not in itself a bad thing, but it is now time to begin to build metadata into the design of working systems that can test the viability of digital preservation strategies in a variety of contexts. This process has already begun in initiatives like the Victorian Electronic Records Stategy and the San Diego Supercomputer Center's 'self-validating knowledge-based archives'. A second need is for increased co-operation between the many metadata initiatives that have an interest in digital preservation. This may include the comparison and harmonisation of various metadata specifications, where this is possible. The OCLC/LG working group is an example of how this has been taken forward whitin a particular domain. There is a need for additional co-operation with recordkeeping metadata specialists, computing scientists and others in the metadata research community. Thirdly, there is a need for more detailed research into how metadata will interact with different formats, preservation strategies and communities of users. This may include some analysis of what metadata could be automatically extracted as part of the ingest process, an investigation of the role of content creators in metadata provision, and the production of user requirements." ... "Also, thought should be given to the development of metadata standards that will permit the easy exchange of preservation metadata (and information packages) between repositories." ... "As well as ensuring that digital repositories are able to facilitate the automatic capture of metadata, some thought should also be given to how best digital repositories could deal with any metadata that might already exist."
SOW
DC "Funded by JISC (the Joint Information Systems Committee of the UK higher education funding councils), as part of its Electronic Libraries (eLib) Programme, Cedars was the only project in the programme to focus on digital preservation." ... "In the digitial library domain, the development of a recommendation on preservation metadata is being co-ordinated by a working group supported by OCLC and the RLG. The membership of the working group is international, and inlcudes key individuals who were involved in the development of the Cedars, NEDLIB and NLA metadata specifications."
Type
Web Page
Title
Metadata for preservation : CEDARS project document AIW01
This report is a review of metadata formats and initiatives in the specific area of digital preservation. It supplements the DESIRE Review of metadata (Dempsey et al. 1997). It is based on a literature review and information picked-up at a number of workshops and meetings and is an attempt to briefly describe the state of the art in the area of metadata for digital preservation.
Critical Arguements
CA "The projects, initiatives and formats reviewed in this report show that much work remains to be done. . . . The adoption of persistent and unique identifiers is vital, both in the CEDARS project and outside. Many of these initiatives mention "wrappers", "containers" and "frameworks". Some thought should be given to how metadata should be integrated with data content in CEDARS. Authenticity (or intellectual preservation) is going to be important. It will be interesting to investigate whether some archivists' concerns with custody or "distributed custody" will have relevance to CEDARS."
Conclusions
RQ Which standards and initiatives described in this document have proved viable preservation metadata models?
SOW
DC OAIS emerged out of an initiative spearheaded by NASA's Consultative Committee for Space Data Systems. It has been shaped and promoted by the RLG and OCLC. Several international projects have played key roles in shaping the OAIS model and adapting it for use in libraries, archives and research repositories. OAIS-modeled repositories include the CEDARS Project, Harvard's Digital Repository, Koninklijke Bibliotheek (KB), the Library of Congress' Archival Information Package for audiovisual materials, MIT's D-Space, OCLC's Digital Archive and TERM: the Texas Email Repository Model.
Type
Web Page
Title
METS : Metadata Encoding and Transmission Standard
CA "METS, although in its early stages, is already sufficiently established amongst key digital library players that it can reasonably be considered the only viable standard for digital library objects in the foreseeable future. Although METS may be an excellent framework, it is just that and only that. It does not prescribe the content of the metadata itself, and this is a continuing problem for METS and all other schema to contend with if they are to realize their full functionality and usefulness."
Conclusions
RQ The standardization (via some sort of cataloging rules) of the content held by metadata "containers" urgently needs to be addressed. If not, the full value of any metadata scheme, no matter how extensible or robust, will not be realized.
This document is a revision and expansion of "Metadata Made Simpler: A guide for libraries," published by NISO Press in 2001.
Publisher
NISO Press
Critical Arguements
CA An overview of what metadata is and does, aimed at librarians and other information professionals. Describes various metadata schemas. Concludes with a bibliography and glossary.
Type
Web Page
Title
Preservation Metadata and the OAIS Information Model: A Metadata Framework to Support the Preservation of Digital Objects
CA "In March 2000, OCLC and RLG sponsored the creation of a working group to explore consensus-building in the area of preservation metadata. ... The charge of the group was to pool their expertise and experience to develop a preservation metadata framework applicable to a broad range of digital preservation activities." (p.1) "The OAIS information model offers a broad categorization of the types of information falling under the scope of preservation metadata; it falls short, however, of providing a decomposition of these information types into a list of metadata elements suitable for practical implementation. It is this need that the working group addressed in the course of its activities, the results of which are reported in this paper." (p. 47)
Conclusions
RQ "The metadata framework described in this paper can serve as a foundation for future work in the area of preservation metadata. Issues of particular importance include strategies and best practices for implementing preservation metadata in an archival system; assessing the degree of descriptive richness required by various types of digital preservation activities; developing algorithms for producing preservation metadata automatically; determining the scope for sharing preservation metadata in a cooperative environment; and moving beyond best practice towards an effort at formal standards building in this area." (47)
SOW
DC "[The OCLC and RLG working group] began its work by publishing a white paper entitled Preservation Metadata for Digital Objects: A Review of the State of the Art, which defined and discussed the concept of preservation metadata, reviewed current thinking and practice in the use of preservation metadata, and identified starting points for consensus-building activity in this area. The group then turned its attention to the main focus of its activity -- the collaborative development of a preservation metadata framework. This paper reports the results of the working groupÔÇÖs efforts in that regard." (p. 1-2)
