An OAI-Compliant Federated Physics Digital Library

该项目正在为国家科学、数学、工程和技术教育数字图书馆（NSDL）建立一个符合开放档案倡议（OAI）的联邦数字图书馆，重点是物理。这个物理数字图书馆将联合来自物理电子打印服务器arXiv （http://arXiv.org）、美国物理学会物理评论D （http://prd.aps.org）和技术报告交换（TRI）项目（http://egbert.cs.odu.edu/tri/html/）的馆藏。TRI包括来自NASA兰利研究中心、洛斯阿拉莫斯国家实验室和空军研究实验室的报告。从Arc项目（http://arc.cs.odu.edu）.To)导入的其他数据集，其元数据元素的丰富程度各不相同，提出了许多具有挑战性的问题，研究人员正在解决这些问题，涉及资源发现、已获取元数据的创建和维护以及经济可持续性等领域。关于资源发现：(1)我们如何使用户能够在一个公共界面中搜索不同的集合，而不会失去使用支持它们的集合的更丰富的元数据元素进行搜索的能力？(2)如何解决缺乏统一的受控词汇的问题？(3)如何将用户的域视图映射到参与档案的元数据模型中？关于创建和维护：(1)保持数据提供者和联合服务之间的元数据几乎一直保持一致的最有效方法是什么？当前的OAI协议是否足够成熟和健壮，足以支持一致性？(2)我们如何处理藏品的动态性？美国国家科学基金会数学和物理科学理事会的多学科活动办公室为该项目提供了重要的共同资金，以表彰其对发展物理领域的收藏和服务的重视。

This project is building an Open Archives Initiative (OAI) compliant federated digital library with an emphasis on physics for the National Science, Mathematics, Engineering, and Technology Education Digital Library (NSDL). This physics digital library will federate holdings from the physics e-print server arXiv (http://arXiv.org), Physical Review D from the American Physical Society (http://prd.aps.org), and the collected holdings from the Technical Report Interchange (TRI) project (http://egbert.cs.odu.edu/tri/html/). TRI includes reports from the NASA Langley Research Center, Los Alamos National Laboratory, and the Air Force Research Laboratory. Other holdings are being imported from the Arc project (http://arc.cs.odu.edu).To federate collections with varying degrees of richness of metadata elements poses a number of challenging questions, which the investigators are addressing, in the areas of resource discovery, creation and maintenance of harvested metadata, and economic sustainability. Regarding resource discovery:(1) How do we enable users to search across diverse collections within one common interface without losing the ability of searching with richer metadata elements for collections that support them?(2) How do we address the lack of a uniform controlled vocabulary?(3) How do we map the user's view of the domain into the metadata models of the participating archives?Regarding creation and maintenance:(1) What is the most effective way of keeping the metadata between data providers and the federation service consistent almost all the time? Are the current OAI protocols sufficiently developed and robust enough to support the consistency?(2) How do we address the dynamic nature of the collections?The Office of Multidisciplinary Activities in NSF's Directorate for Mathematical and Physical Sciences is providing significant co-funding for this project in recognition of its emphasis on developing collections and services in the area of physics.