Portico——一种电子期刊存档模式

Portico于2005年成型并启动。此计划主要是保存电子形式的学术文献，通过对典藏电子资源开展收费模式的经营，建立长久的典藏机制。Portico的电子期刊归档方案是针对出版商电子资源文档的保存，其规范化文档工作重点在于确保资料未来的有效性和可索取性。目前，Portico的商业模式已经建立，而这种商业模式不但切中了图书馆的需求，而且也符合出版社的意愿。     

LOCKSS——实现网络电子资源的持久保存

网络电子资源长期保存问题已经成为当今图书馆的一大挑战,为此,国际上相继启动了一系列项目解决这一问题,美国斯坦福大学的LOCKSS项目就是其中的一个。本文重点介绍了LOCKSS的概念、LOCKSS系统的主要功能及其运行机制。     

LOCKSS与电子期刊长期保存应用研究

文章通过对美国斯坦福大学发起的数字资源长期保存计划--LOCKSS进行介绍和分析,探讨了LOCKSS项目在图书馆电子期刊长期保存应用中的影响和意义.     

Portico知识库存储文章超过360万篇

非营利性组织Portico的宗旨是长期保存电子学术文献，并确保后代能获得这些资料。Portico最近宣布，其学术电子期刊知识库存储量已经超过360万篇。Portico是在2005年由JSTOR、梅隆基金会（AndrewW．Mellon Foundation），Ithaka和美国国会图书馆（Library of Congress）支持成立，用以回应电子期刊长期保存的迫切需求，通过强有力的手段，来保存学术电子期刊，并确保其在未来可以使用。     

第三方存储Portico的技术研究

Portico是一种电子资源归档模式。本文简要介绍Portico项目的基本概况,着重从系统架构、数据发送和摄入、数据保存、数据管理以及访问管理等方面探讨其技术特点,认为其技术实施的很多方面具有借鉴意义。     

ZADL协作框架下数字资源长期合作保存策略探索

数字资源长期保存在国外已经取得显著成效,但其复杂性也促使各方开始关注长期保存的合作管理。该文基于目前ZADL的资源现状和架构,参考了LOCKSS的成功经验,提出了ZADL模式下的数字资源长期合作保存策略,主要包括合作管理策略、技术策略、经济策略等方面。     

LOCKSS系统中的数据监护

对LOCKSS系统及其成功应用案例ADPNet进行深入分析,描述了LOCKSS数据监护中的中心控制机制以及LOCKSS数据缓存的质量控制,论证LOCKSS在我国的适用性,并提出了我国开展数字资源长期保存的建议以及LOCKSS系统应用的解决方案。     

LOCKSS:图书馆数字资源长期保存的新机制

LOCKSS(Lots of Copies Keeps Stuff Safe,多备份资源保存)项目提供了数字资源长期保存的新机制,可广泛地运用于电子期刊的永久保存与利用。电子期刊内容在获得授权后可自动选择并保存在本地计算机“缓存”中,从而解决了图书馆与数字资源供应商对数字资源利用和保存的所各自承担的权利和义务。     

LOCKSS数字资源长期保存策略及其应用初探

通过对美国斯坦福大学发起的数字资源长期保存计划——LOCKSS项目系统架构进行介绍和分析，探讨了LOCKSS对图书馆数字资源保存所带来的影响，以及如何建立LOCKSS馆藏，以期对我国在这方面的研究和应用起到抛砖引玉的作用。     

Portico：第三方数字资源长期保存模式初探

系统介绍第三方数字资源长期保存模式Portico提出的历史背景与发展现状,从机构组织、经费来源、内容保存方式三个方面分析其经营模式,探讨其采取的各种措施,进而分析该项目在保存费用确定及合作机制等方面存在的问题,未我国数字资源长期保存活动的开展提供实践依据。     

LOCKSS插件技术与中文期刊Plugin开发

介绍LOCKSS系统架构及其长期保存策略，重点分析LOCKSS期刊插件的组成方法、属性定义，并在此基础上，讨论插件类型特征及开发模式，提出中文期刊Plugin的开发原则、策略和实现步骤。     

Preserving Content from Your Institutional Repository

Between institutional repositories and hosting journals, many libraries are becoming responsible for scholarly content in new ways. While Portable Document Formats (PDFs) are the most common formats today, the unique, local, serial content could be in a variety of formats. These items might be digitized text, born digital text, audio, video, images, or multimedia. This article discusses formats that will remain accessible through time (PDF/A, txt, xml) so that contents are not locked into proprietary formats. It will also discuss options for backing up items and associated metadata, including simple backups, off-site storage of files, Lots of Copies Keep Stuff Safe (LOCKSS), Private LOCKSS Networks, and Portico. The article offers suggestions for how your library might best preserve local content.     

Towards Developing a CAS E-Journal Archiving System

As a part of NSTL proposed long-term preservation of digital information network, the National Science Library of CAS (NSLC) constructed a long-term preservation system of electronic journals called CAS E-Journal Archiving System, which was based on OAIS and adapted Fedora as the fundament system. The system chose a certain amount of electronic journals as pilot resources. Through three major system functional components comprising ingest, preservation management and data dissemination, the system took the long-term preservation of digital objects function into practice. The system is designed to be open and scalable. It realized digital objects management and lifecycle management. In this paper we describe the design of the system, and the issues we have learnt about long-term preservation.     

Consortial Ebook Archiving Environmental Scan

Academic libraries and consortia are spending the vast majority of their material budgets on digital content, including ebooks. A review of ebook preservation activities for the North American library consortia is provided along with a look at the major preservation services such as Portico, CLOCKSS and HathiTrust. Publishers and ebook aggregators are also examined to provide a broad environmental scan of the current ebook preservation activities and risks.     

CLOCKSS—It Takes a Community

CLOCKSS (Controlled Lots of Copies Keep Stuff Safe) is a community-wide endeavor built upon the widely used LOCKSS system. CLOCKSS is working to guarantee long-term access to digital materials regardless of ability to pay. Two lively sessions led by Victoria Reich, Director of the LOCKSS Program at Stanford University Libraries, were packed to capacity. Librarian and publisher participants in CLOCKSS are implementing a shared solution to one of the most significant challenges of the digital era.     

国内图书馆数字资源的长期保存研究述评

介绍了数字资源长期保存的必要性和重要性,梳理和归纳了数字资源长期保存的研究热点,包括保存项目、保存模式、保存困难和保存策略等,并分析了其特点和不足。