What is Digital Object?
注:本文正在写作中，内容可能随时更新。本论文的写作过程中全部采用web2.0工具：利用writely记录、写作，利用google、delicious搜集资料，利用delicious标记参考文献。
本文将解释数字对象的构成，数字对象在不同环境中的存在形式，以及在OAIS模型中的体现。数字对象的模型在数字资源组织建设，保存管理，存取服务中都有不同的体现，一个明确的数字对象模型是做好这些工作的基础。一个图书馆往往会存在不同的数字资源管理系统，这些系统中有负责资源加工获取的，有负责资源保存版权管理的，有负责存取服务的。在这些系统之间资源的相互交换，必然涉及数字对象的实现。构建符合图书馆实际情况的数字对象模型，对数字图书馆建设是至关重要的。
本论文包括数字对象如下内容：
内容的完备性：构成，满足不同上下文中的变化；
结构的完备性：物理结构适应不同的应用环境；
功能的完备性：OAIS在其中的体现；
资源交换的要求/系统互操作的要求：数据的封装，个体交换，批量交换；
长期保存的要求；
对象生成的要求，微内容的不断充实；
服务的要求，WEB2.0的服务模式要求；提供微内容的服务；
应用实例：电子图书，学位论文，新闻，博客条目，字画拓片，古籍电子书，课件。
什么是可信任的数字仓储？
What is trusted digital repository?
参考文献
title:Digital Preservation Architecture and Technology for Trusted Digital Repositories,针对可信任的数字仓储的数字保存体系结构和技术
creator:
Ronald Jantz,
Michael J. Giarlo source:D-Lib Magazine,June 2005,Volume 11 Number 6,ISSN 1082-9873
source uri:
http://www.dlib.org/dlib/june05/jantz/06jantz.html description Abstract:
开发针对信任数字仓储的保存方法需要集成新的方法、策略、标准和技术。数字仓储保存电子资源的期限至少能够和现存的保存方法差不多。现代计算技术不过才50年，10年前我们中很少有人看到或使用数字对象。传统保存的实践还只是好的设计，我们缺少保存经验和一致意见，这就导致出现了怎样进行基于数字的保存问题。我们能够保存数字对象至少100年吗？我们能够回答诸如”这个对象是数字原件吗”,或者”这个数字对象产生多久了”？这其实是一个数字资料的信任仓储要做的。本文的一个基本结论是今天有很多可用技术将帮助我们在数字保存方面建立信任，并且这些技术可以容易地集成到一个运行的数字保存框架中。
Developing preservation processes for a trusted digital repository will require the integration of new methods, policies, standards, and technologies. Digital repositories should be able to preserve electronic materials for periods at least comparable to existing preservation methods. Modern computing technology in general is barely fifty years old and few of us have seen or used digital objects that are more than ten years old. While traditional preservation practices are comparatively well-developed, lack of experience and lack of consensus raise some questions about how we should proceed with digital-based preservation processes. Can we preserve a digital object for at least one-hundred years? Can we answer questions such as “Is this object the digital original”? or “How old is this digital object”? What does it mean to be a trusted repository of digital materials? A basic premise of this article is that there are many technologies available today that will help us build trust in a digital preservation process and that these technologies can be readily integrated into an operational digital preservation framework.
Digital preservation is defined as the managed activities necessary: 1) For the long term maintenance of a byte stream (including metadata) sufficient to reproduce a suitable facsimile of the original document and 2) For the continued accessibility of the document contents through time and changing technology.数字保存定义为管理活动的必须满足1)对一个字节流(包括元数据)的长期维护,使其足够再生一个合适的原文档的副本,2)跨越时间和变化的技术的持续的存取能力.
We will further define the digital object as the basic unit of both access and digital preservation and one that contains all of the relevant pieces of information required to reproduce the document including metadata, byte streams, and special scripts that govern dynamic behavior. This data is encapsulated in the digital object and should be managed as a whole. If our archive is organized in such a way that bits and pieces of the object are scattered throughout the storage system, it becomes difficult, perhaps impossible, to keep track of all these pieces, and the digital archivist risks the possibility of not migrating all the relevant material as one unit.
我们进一步定义了数字对象:存取和数字保存的基本单元,包含再生文档所需要的所有的信息的有关部分,包括元数据,字节流,支配动态表现的专门描述.这些数据被封装栽树字对象中,并且应当作为一个整体管理.
A reliable digital repository is one whose mission is to provide long-term access to managed digital resources; that accepts responsibility for the long-term maintenance of digital resources on behalf of its depositors and for the benefit of current and future users; that designs its system(s) in accordance with commonly accepted conventions and standards to ensure the ongoing management, access, and security of materials deposited within it; that establishes methodologies for system evaluation that meet community expectations of trustworthiness; that can be depended upon to carry out its long-term responsibilities to depositors and users openly and explicitly; and whose policies, practices, and performance can be audited and measured.
数字对象的数字签名,永久标示符.
在Rutgers University Libraries (RUL)建立一个基于Fedora建立一个数字存储系统.
title:Research Libraries Group. (2002).
Trusted digital repositories: Attributes and responsibilities.
source:
http://www.rlg.org/longterm/repositories.pdf
This report describes a framework of attributes and responsibilities for trusted repositories
for digital content capable of handling the range of materials held by large and small research
institutions. It builds on the foundations laid down in the CPA/RLG report, including its
concept of a “deep infrastructure” and on the more recent work on the OAIS Reference
Model, which provides a high-level, generic model for the environment, producers, users,
data types, and information flows of a digital repository.
title:An Architecture for Information in Digital Libraries
creator:William Y. Arms ,Christophe Blanchi ,Edward A. Overly
source:D-Lib Magazine, February 1997,ISSN 1082-9873
source url:http://www.dlib.org/dlib/february97/cnri/02arms1.html
description abstract:
非常经典的一篇文章，虽然已经快过去了10年，在今天依然值得一读。文中对信息的结构，数字对象组织都有明晰的描述。数字对象构成要素的意义：handle，metadata
meta-object:元对象
- An element is a bit sequence comprising an elementary unit of information. An element has its own ID.
- A package is a collection of elements and other packages, with its own ID.
- A digital object is a package with key-metadata for use in a networked environment. The ID is a handle.
The Repository Access Protocol
All interactions with the repository use the Repository Access Protocol (RAP). For the pilot repository, the following RAP commands were implemented. Each is implemented as a method on the repository class.
- VerifyHandle. Confirm that a handle has been registered in the handle system.
- AccessRepoMeta. Access the repository metadata.
- Verify_DO. Confirm that a repository stores a digital object with a specified handle.
- AccessMeta. Access the metadata for a specified digital object.
- Access_DO. Access the digital object.
- Deposit_DO. Deposit a digital object in a repository.
- Delete_DO. Deletes a digital object from a repository.
- MutateMeta. Edit the metadata for a digital object.
- Mutate_DO. Edit a digital object.
In addition, a small number of methods have been implemented to administer the repository. These methods are not part of RAP.
Identifying Repositories:对象仓储命名与对象存取紧密相关。
title:Key Concepts in the Architecture of the Digital Library
creator:William Y. Arms
source:D-Lib Magazine, July 1995
source url:http://www.dlib.org/dlib/July95/07arms.html
description:
1. The technical framework exists within a legal and social framework
技术框架同时和法律框架与社会框架共存;
2. Understanding of digital library concepts is hampered by terminology
术语妨碍了对数字图书馆概念的理解;
3. The underlying architecture should be separate from the content stored in the library
基础架构应从图书馆藏内容中分离出来;
4. Names and identifiers are the basic building block for the digital library
命名和标识是数字图书馆的基础建设模块;
5. Digital library objects are more than collections of bits
数字图书馆对象不仅仅是位流的聚集;
6. The digital library object that is used is different from the stored object
使用的数字图书馆对象不同于存储的对象;
7. Repositories must look after the information they hold
对象存储必须对其保存的信息进行维护;
8. Users want intellectual works, not digital objects
用户需要的是知识作品而不是数字对象;
title:The Fedora Project:An Open-source Digital Object Repository Management System
source:D-Lib Magazine,April 2003,Volume 9 Number 4,ISSN 1082-9873
source url:http://www.dlib.org/dlib/april03/staples/04staples.html
Fedora对象模型说明
The Fedora architecture is based on object models that by definition are templates for units of content, called data objects, which can include digital resources, metadata about the resources, and linkages to software tools and services that have been configured to deliver the content in desired ways. These software connections are provided as methods encoded into two kinds of inter-related behavior objects as described below. A Fedora repository provides access to the data objects by leveraging tools and services that are described by the behavior objects. The behavior objects store metadata that describes the operations of the tool/service and the runtime bindings for running the operations. The Web Services Description Language (WSDL) is used to describe the tool/service bindings.
Fedora体系结构基于对象模型，而对象模型是被称为数据对象的内容单元的模板，数据对象包括数字资源与其元数据，以及被配置为按希望的方法对内容进行分发的软件工具和服务的关联。
Figure 1. The object model
The digital resources and the metadata are datastreams in an object model, definitions of which connect the content model either to internal content under the direct control of the repository or to external content that is delivered via HTTP servers. The content of a datastream is identified using a URL. When an object is ingested into a Fedora repository, a URL for a managed datastream is used by the repository system to retrieve the content and store it in the file space under its control; the datastream in the object is updated to be this internal address. When an object contains a datastream defined as external, the URL is stored in the datastream and used by the repository to access the data whenever necessary. An in-line metadata datastream is a bytestream that is name-spaced XML encoded data stored in the XML instantiation of the object directly, rather than as remote or managed content.
From the user’s point of view, the linkages to software tools and services (via disseminators) are seen as behaviors upon the units of content. These behaviors can be exploited to deliver varieties of prepared content directly to a web browser. They can also be used to prepare or configure content to be used through some external software application. In a sense, these object models can be thought of as containers that give a useful shape to information poured into them; if the information fits the container, it can immediately be used in predefined ways.
Fedora makes it possible to describe abstract sets of behaviors that constrain a corresponding set of specific processes or mechanisms delivering the behavior described for a given unit of content. One abstract set of behaviors, a behavior definition (bdef) object, can be used to constrain many mechanism sets, or behavior mechanism (bmech) objects, ensuring a standardization of behaviors for different units of content that are equivalent in type, but differing in format. A bdef object formally defines the terms of a behavior contract that must be upheld by any bmech object to be paired with it. In turn, the bmech object contains a data contract, the terms of which any data object model subscribing to it must meet. Bdef objects and bmech objects are analogous to interfaces and implementations in object-oriented programming.
Figure 2. Behavior object contracts
A data object model subscribes to a set of behaviors by linking to a bdef object and pairing it with a link to an appropriate bmech object. This pair of links defines a disseminator; an object model can contain any number of disseminators. In practical terms, this means a specific data object conforming to the model can have sets of behaviors for a variety of purposes, or sets of behaviors equivalent in purpose but that prepare the object’s content to be delivered to applications with different format requirements. In summary, a data object model specifies the number and types of datastreams as well as the set of disseminators every conforming data object will have.
title:5SGraph demo: a graphical modeling tool for digital libraries
creator:Qinwei Zhu Goncalves, M.A. Fox, E.A.; Virginia Polytech. & State Univ., Blacksburg, VA, USA
source:This paper appears in: Digital Libraries, 2003. Proceedings. 2003 Joint Conference on Digital Libraries ; Houston, TX, USA, 27-31 May 2003
Abstract
We present a domain-specific visual modelling tool, 5SGraph, aimed at modelling digital libraries. 5SGraph is based on a metamodel that describes DLs using the 5S theory [M.A. Goncalves et al., 2003]. The output from 5SGraph is a digital library model that is an instance of the metamodel, expressed in the 5S description language (5SL) [M.A. Goncalves et al., 2002]. 5SGraph presents the metamodel in a structured toolbox, and provides a top-down visual building environment for designers. The visual proximity of the metamodel and instance model facilitates requirements gathering and simplifies the modelling process. Furthermore, 5SGraph maintains semantic constraints specified by the 5S metamodel and enforces these constraints over the instance model to ensure semantic consistency and correctness. 5SGraph enables component reuse to reduce the time and efforts of designers. 5SGraph also is designed to be flexible and extensible, able to accommodate and integrate several other complementary tools (e.g., to model scenarios or complex digital objects), reflecting the interdisciplinary nature of digital libraries. The tool has been tested with real users and several modelling tasks in a usability experiment [Zhu, Q., 2002] and its usefulness and learnability have been demonstrated.
title:An architectural design for digital objects
creator:Fishwick, P.A. ;Dept. of Comput. & Inf. Sci. & Eng., Florida Univ., Gainesville, FL, USA;
This paper appears in: Simulation Conference Proceedings, 1998. Winter
Publication Date: 13-16 Dec. 1998
Volume: 1
On page(s): 359 - 365 vol.1
Number of Pages: 2 vol. (xxxiii+xix+1765)
Meeting Date: 12/13/1998 - 12/16/1998
Location: Washington, DC
INSPEC Accession Number:6147637
Digital Object Identifier: 10.1109/WSC.1998.745009
Posted online: 2002-08-06 21:49:18.0
Abstract
Defines the term “digital object” and specifies a variety of qualities that are important during the object design phase. A digital object contains a set of models, and is meant to serve as a reusable entity to be used on the World Wide Web or over the Internet. An example using a two-link robot arm is presented. We have found the digital object design methodology to provide an information schema to describe where to locate information about the object, for simulation of dynamic models as well as the execution of other model types
title:The law of possession of digital objects: dominion and control issues for digital forensics investigations and prosecutions
creator:Losavio, M.M.; Dept. of Comput. Eng. & Comput. Sci., Louisville Univ., KY, USA
This paper appears in: Systematic Approaches to Digital Forensic Engineering, 2005. First International Workshop on
Publication Date: 7-9 Nov. 2005
On page(s): 177 - 183
Number of Pages: ix+279
INSPEC Accession Number:8749638
Digital Object Identifier: 10.1109/SADFE.2005.25
Posted online: 2006-02-13 09:02:47.0
Abstract
The possession of digital objects defines rights and liabilities of the possessor. The nature of digital data, networked systems and data security suggest review of the fundamental concept as applied to digital objects. Possession of digital objects may be separate and distinct from physical possession of storage media and systems. Failure to address this risks error based on misleading evidence as to possession.
title:Digital object identifiers and their role in the implementation of electronic publishing
creator:Davidson, L.A. Douglas, K. Seeley G. Mudd ;Libr. for Sci. & Eng., Northwestern Univ., Evanston, IL, USA;
This paper appears in: Socioeconomic Dimensions of Electronic Publishing Workshop, 1998. Proceedings
Publication Date: 23-25 April 1998
On page(s): 59 - 65
Number of Pages: ix+153
Meeting Date: 04/23/1998 - 04/25/1998
Location: Santa Barbara, CA
INSPEC Accession Number:6097208
Digital Object Identifier: 10.1109/SEDEP.1998.730709
Posted online: 2002-08-06 22:06:24.0
Abstract
The major scientific, technical and medical (STM) publishers have developed the Digital Object Identifier (DOI) system that will potentially offer improved order and reliability for the discovery and access of information on the global network. However, the system, as it is currently envisioned, does not meet the needs of all types of publishers, commands unknown overhead costs, is vague in application, and has features that potentially hinder access rather than facilitate it. The DOI development will need the input of not just publishers, but librarians, scholarly societies, and researchers to be effectively implemented on a worldwide scale and attract the system participants and users it will need to prevail
title:Spatiotemporal annotation graph (STAG): a data model for composite digital objects
creator:Smriti Yamini Amarnath Gupta; Dept. of Comput. Sci. & Eng., California Univ., San Diego, CA, USA
This paper appears in: Data Engineering, 2005. ICDE 2005. Proceedings. 21st International Conference on
Publication Date: 5-8 April 2005
On page(s): 1129 - 1130
Number of Pages: xxx+1154
ISSN: 1084-4627
INSPEC Accession Number:8556276
Digital Object Identifier: 10.1109/ICDE.2005.136
Posted online: 2005-04-18 09:11:49.0
description Abstract
In this demonstration, we present a database over complex documents, which, in addition to a structured text content, also has update information, annotations, and embedded objects. We propose a new data model called spatiotemporal annotation graphs (STAG) for a database of composite digital objects and present a system that shows a query language to efficiently and effectively query such database. The particular application to be demonstrated is a database over annotated MS Word and PowerPoint presentations with embedded multimedia objects.
title:P2P-4-DL: digital library over peer-to-peer
creator:Walkerdine, J. Rayson, P. ;Dept. of Comput., Lancaster Univ., UK
This paper appears in: Peer-to-Peer Computing, 2004. Proceedings. Proceedings. Fourth International Conference on
Publication Date: 25-27 Aug. 2004
On page(s): 264 - 265
Number of Pages: x+286
INSPEC Accession Number:8272574
Digital Object Identifier: 10.1109/PTP.2004.1334957
Posted online: 2004-09-20 11:00:33.0
Abstract
The P2P-4-DL project aims to investigate and build a DL system that would operate over a P2P structure. Rather than storing digital objects centrally they remain the responsibility of the individual peers that provide them. This allows the system to utilise network resources more efficiently as well as providing users with a greater sense of control over the digital objects they share. Our prototype also draws upon natural language processing (NLP) techniques in an attempt to increase the usability of the system. Other related work within this area includes EDUTELLA, a RDF based P2P infrastructure that can support the development of DL’s.
title:The OpenDOOR project: a Digital Object Observatory and Repository on the World Wide Web
creator:Nous, A.P. ;NASA Educator Resource Center, Pittsburgh Univ., PA, USA;
This paper appears in: Geoscience and Remote Sensing Symposium Proceedings, 1998. IGARSS ‘98. 1998 IEEE International
Publication Date: 6-10 July 1998
Volume: 1
On page(s): 536 - 538 vol.1
Number of Pages: 5 vol. cxxxii+2754
Meeting Date: 07/06/1998 - 07/10/1998
Location: Seattle, WA
INSPEC Accession Number:6034191
Digital Object Identifier: 10.1109/IGARSS.1998.702963
Posted online: 2002-08-06 22:00:22.0
Abstract
The University of Pittsburgh-NASA Educator Resource Center collaboration for imaging and visualization has developed a website from general guidelines suggested in visualization of space data. It is an Internet website supporting an open Digital Object Observatory and Repository, (OpenDOOR) (www.pitt.edu/~nasa/opendoor/openDOOR.html). The author describes a website displaying images, providing lessons, abstracts of technical reports, and concept papers, and eventually involving sharing of data in real time, control of instruments, and tools allowing students to work together over a wide area network
title:A semi-automated digital preservation system based on semantic Web services
creator:Hunter, J. Choudhury, S. ;DSTC PTY Ltd, Brisbane, Qld., Australia
This paper appears in: Digital Libraries, 2004. Proceedings of the 2004 Joint ACM/IEEE Conference on
Publication Date: 7-11 June 2004
On page(s): 269 - 278
Number of Pages: xiv+429
INSPEC Accession Number:8179679
Digital Object Identifier: 10.1109/JCDL.2004.1336136
Posted online: 2004-09-27 13:20:38.0
description Abstract
We describe a Web-services-based system, which we have developed to enable organizations to semiautomatically preserve their digital collections by dynamically discovering and invoking the most appropriate preservation service, as it is required. By periodically comparing preservation metadata for digital objects in a collection with a software version registry, potential object obsolescence can be detected and a notification message sent to the relevant agent. By making preservation software modules available as Web services and describing them semantically using a machine-processable ontology (OWL-S), the most appropriate preservation service(s) for each object can then be automatically discovered, composed and invoked by software agents (with optional human input at critical decision-making steps). We believe that this approach represents a significant advance towards providing a viable, cost-effective solution to the long term preservation of large-scale collections of digital objects.
title:Principles for digital preservation
creator:H. M. Gladney. Association for Computing Machinery. Communications of the ACM.
Document types: Feature
Publication title: Association for Computing Machinery. Communications of the ACM. New York: Feb 2006. Vol. 49, Iss. 2; pg. 111
ISSN/ISBN: 00010782
ProQuest document ID: 980874011
DOI: 10.1145/1113034.1113038
Document URL: http://proquest.umi.com/pqdweb?did=980874011&sid=1&Fmt=2&clientId=42365&RQT=309&VName=PQD
Abstract (Document Summary)
Most preservation literature emphasizes the perspectives of archiving institutions. This article and supporting Trustworthy Digital Object (TDO) reports focus on end users needs because these have precedence over repository needs. Principles for a TDO design have been articulated here to address every technical problem and requirement identified in the literature. The central elements are an encapsulation scheme for digital preservation objects and encoding using extended Turing-complete virtual machines. Correct TDO implementations will allow preservation of any type of digital information and will be as efficient as any competing solution. Critical examination of this work by readers is encouraged and public discussion is called for because getting it right is too important for anything short of complete transparency.
title:aDORe: A Modular, Standards-Based Digital Object Repository
creator:Herbert Van de Sompel, Jeroen Bekaert, Xiaoming Liu, Luda Balakireva, Thorsten Schwander. The Computer Journal. London: Subjects: Digital libraries, Computer architecture, Extensible Markup Language, Information storage, Coding standards
Companies: Los Alamos National Laboratory (NAICS: 541710 )
Author(s): Herbert Van de Sompel, Jeroen Bekaert, Xiaoming Liu, Luda Balakireva, Thorsten Schwander
Publication title: The Computer Journal. London: 2005. Vol. 48, Iss. 5; pg. 514
Supplement: Special Focus-Working with Multimedia Standards: MPEG-7,
ISSN/ISBN: 00104620
ProQuest document ID: 893266741
Document URL: http://proquest.umi.com/pqdweb?did=893266741&sid=1&Fmt=2&clientId=42365&RQT=309&VName=PQD
Abstract (Document Summary)
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 reflects 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 those services to OAIS AIPs, Digital Objects, or constituent datastreams that were specified in a dissemination request.[PUBLICATION ABSTRACT]
title:Archives and manuscripts: Digital assets for the next millennium
ceartor:Elizabeth Yakel. OCLC Systems and Services.
Subjects: Archives & records, Digital libraries, Technological change, Information management
Author(s): Elizabeth Yakel
Publication title: OCLC Systems and Services. Bradford: 2004. Vol. 20, Iss. 3; pg. 102
ISSN/ISBN: 1065075X
ProQuest document ID: 715699771
Document URL: http://proquest.umi.com/pqdweb?did=715699771&sid=1&Fmt=2&clientId=42365&RQT=309&VName=PQD
Abstract (Document Summary)
Over the past decade, a variety of digital imaging projects have been carried out in archives, libraries, and museums. This paper discusses the difficulties in moving from a series of digital projects to a digitization program, and the ensuing transformation in thinking from digital objects to digital assets that needs to occur. It also discusses the problems archives and museums face in managing, preserving, and providing continuing access to these digital assets and potential models for their long-term management. [PUBLICATION ABSTRACT]
title:Developing a digital preservation strategy at Edinburgh University Library
creator:Najla Semple.
Subjects: Studies, Colleges & universities, Digital libraries, Information storage, Pilot projects
Classification Codes 9130 Experimental/theoretical, 5200 Communications & information management, 8306 Schools and educational services, 9175 Western Europe
Locations: United Kingdom, UK
Companies: Edinburgh University Data Library (NAICS: 514120 )
Author(s): Najla Semple
Publication title: VINE. Bradford: 2004. Vol. 34, Iss. 1; pg. 33
ISSN/ISBN: 03055728
ProQuest document ID: 624162501
Document URL: http://proquest.umi.com/pqdweb?did=624162501&sid=1&Fmt=4&clientId=42365&RQT=309&VName=PQD
Abstract (Document Summary)
Digital preservation poses an increasing cause for concern in UK higher education institutions. This paper provides a general overview of the development of a digital preservation pilot project within a university library, including the future integration of the METS and OAIS standards. It also considers how it is planned to automate these digital preservation practices in Edinburgh University Library’s new digital object management system.
title:Pulling it all together: use of METS in RLG cultural materials service
creator:Merrilee Proffitt. Library Hi Tech.
Subjects: Studies, Libraries, Standards, Metadata, Software, Catalogs
Classification Codes 9540 Non-profit institutions, 9130 Experimental/theoretical, 9190 United States, 5240 Software & systems
Locations: United States, US
Author(s): Merrilee Proffitt
Publication title: Library Hi Tech. Bradford: 2004. Vol. 22, Iss. 1; pg. 65
ISSN/ISBN: 07378831
ProQuest document ID: 621960011
Document URL: http://proquest.umi.com/pqdweb?did=621960011&sid=1&Fmt=2&clientId=42365&RQT=309&VName=PQD
Abstract (Document Summary)
RLG has used METS for a particular application, that is as a wrapper for structural metadata. When RLG cultural materials was launched, there was no single way to deal with “complex digital objects”. METS provides a standard means of encoding metadata regarding the digital objects represented in RCM, and METS has now been fully integrated into the workflow for this service.[PUBLICATION ABSTRACT]
title:分布式数字图书馆机制
creatror :张晓林
source:情报学报,2000年,21卷,第1期,issn1007-7634
description abstract:
本文在简要分析分布数字图书馆体系的现实性、互操作性要求、互操作性实现方式后，探讨了基于分布式数字对象和基于外部协调体系的分布式数字图书馆模式，并简要介绍NCSTRL、OAI、DNER、NSDL等具体分布式数字图书馆系统
title:数字图书馆中数字对象的概念、作用及其命名与标识
creator:刘友华 张福炎
source:情报学报,2002年 20卷 12期,issn1007-7634
description abstract:
数字对象是数字图书馆架构的根本保证。本文首先提出了讨论有关数字对象问题技术的必要性，并理解性地描述了数字对象的概念，简单分析并说明了数字对象在数 字图书馆中的核心地位与关键作用，同时结合实例描述了通过命名系统对数字对象进行标识的现状，最后给出了如何解决有关数字对象问题的一些建议与方法.
title:开放数字信息服务体系：概念、结构与技术
creator:张晓林
source:中国图书馆学报，2002年 28卷 3期，issn1001-8867
description abstract:开放数字信息服务体系，有其特定的概念、原则要求和功能框架。开放系统的开放描述基于扩展的元数据概念，信息系统通过开放语言和规范机制来实现对系统各层 次内容的开放描述。发布服务机制源于分布对象技术，它将各种系统视为一个数字对象，对其界面、功能、数据流、传输协议等进行描述。开放体系的开放集成，包 括横向和纵向开放集成，它们各有其技术线路。
title:复合数字对象研究
creator:李春旺 张晓林
source:情报学报，2004 Vol.23 No.4 P.444-451
本文在综合分析国外数字对象研究现状之后,讨论了复合数字对象的属性特征.在此基础上,提出了一个复合数字对象参考模型,介绍了其层次结构的划分原则以及各层功能组成.
title:数字图书馆的数字对象体系结构
creator:欧洁 罗治国
source:中国科学院研究生院学报,2000年 17卷 1期,ISSN: 1002-1175
description abstract:
介绍了数字图书馆的数字对象体系结构，它提供对分布式数字对象的持久保存、安全访问、管理以及索引服务，它的组成部分有：名录服务系统、仓储服务系统、索 引服务系统和用户接口网关。名录服务系统在整个internet范围内为用户提供安全的名录解析和分布式的句柄管理服务。仓储服务系统的基本存储单元是数 字对象，整个系统就是为了如何存储、访问、管理数字对象而设计的。索引服务系统进行资源发现，从而使用户能够很容易地从馆藏中寻找和发现所需的对象（内 容）。用户接口网关提供以人为中心的数字图书馆功能入口点。