Esta comunicação apresenta os aspetos mais significativos da evolução recente da estrutura de dados da Biblioteca Nacional Digital (BND), que se consubstanciam na definição de um novo modelo de objeto digital alinhado com o modelo de referência OAIS (Open Archival Information System); na aplicação de novos esquemas de metadados internacionais como o PREMIS (Preservation Metadata Implementation Strategies) e o MIX (Metadata for Images in XML); na formalização de um perfil de metadados para a BND; no desenvolvimento de uma ferramenta criada para a implementação deste novo modelo de informação digital e das operações de ingestão, acesso e administração do arquivo e, bem assim, na integração desse software com outas aplicações e sistemas de produção e gestão dos objetos digitais que constituem a BND.
This paper describes work in progress on the research project CWSpace, sponsored by the MIT and Microsoft Research iCampus program, to investigate the metadata standards and protocols required to archive the course materials found in MIT’s OpenCourseWare (OCW) into MIT’s institutional repository DSpace. The project goal is “to harvest and digitally archive OCW learning objects, and make them available to learning management systems by using Web Services interfaces on top of DSpace.” The larger vision is one of complex digital objects (CDOs) successfully interoperating amongst MIT’s various learning management systems and learning object repositories, providing archival preservation and persistent identifiers for educational materials, as well as providing the means to richer shared discovery and dissemination mechanisms for those materials. The paper describes work to date on the analysis of the content packaging metadata standards METS (Metadata Encoding and Transmission Standard) and especially IMS-CP (IMS Global Learning Consortium, Content Packaging), and issues faced in the development and use of profiles, extensions, and external schema for these standards. Also addressed are the anticipated issues in the preparation of transformations from one standard to another...
Various XML-based approaches aimed at representing compound digital assets
have emerged over the last several years. Approaches that are of specific
relevance to the digital library community include the Metadata Encoding and
Transmission Standard (METS), the IMS Content Packaging XML Binding, and the
XML Formatted Data Units (XFDU) developed by CCSDS Panel 2. The MPEG-21 Digital
Item Declaration (MPEG-21 DID) is another standard specifying the
representation of digital assets in XML that, so far, has received little
attention in the digital library community. This article gives a brief insight
into the MPEG-21 standardization effort, highlights the major characteristics
of the MPEG-21 DID Abstract Model, and describes the MPEG-21 Digital Item
Declaration Language (MPEG-21 DIDL), an XML syntax for the representation of
digital assets based on the MPEG-21 DID Abstract Model. Also, it briefly
demonstrates the potential relevance of MPEG-21 DID to the digital library
community by describing its use in the aDORe repository environment at the
Research Library of the Los Alamos National Laboratory (LANL) for the
representation of digital assets.; Comment: 27 pages, accepted submission to the special edition on complex
objects of the International Journal on Digital Libraries
Various efforts aimed at representing digital assets have emerged from
several communities over the last years, including the Metadata Encoding and
Transmission Standard (METS), the IMS Content Packaging (IMS-CP) XML Binding
and the XML Formatted Data Units (XFDU). The MPEG-21 Digital Item Declaration
(MPEG-21 DID) is another approach that can be used for the representation of
digital assets in XML. This paper will explore the potential of the MPEG-21 DID
in a Digital Preservation context, by looking at the core building blocks of
the OAIS Information Model and the way in which they map to the MPEG-21 DID
abstract model and the MPEG-21 DIDL XML syntax.; Comment: Accepted paper for PV 2005 "Ensuring Long-term Preservation and
Adding Value to Scientific and Technical data"
The Metadata Encoding & Transmission Standard (METS) is an XML Schema created under the sponsorship of the Digital Library Federation and maintained by the Library of Congress which allows to create a rich structure capable to hold not only the multiple types of metadata used to describe the assets of a digital library, but also the own digital objects, be for management purposes, be to allow an interchange between different institutions. This article presents the motivation problems for its creation and its historical origin in the Making of America II project. Describes the purpose of each XML element that forms the vocabulary of this standard and shows the usage of some of them with XML coded examples, which requires a basic knowledge of that language for better understanding. Expresses its relation with the Open Archival Information System model as a meaningful example of its use and, finally, mentions other standards created with similar purposes.; O Metadata Encoding & Transmission Standard (METS) é um XML Schema elaborado sob o patrocínio da Digital Library Federation e mantido pela Biblioteca do Congresso Norte Americano que permite criar uma rica estrutura capaz de registrar, não apenas os múltiplos tipos de metadados usados para descrever o acervo de uma biblioteca digital...