Collaborative Project: An NSDL Registry: Supporting Interoperable Metadata Distribution

此服务跟踪项目是来自华盛顿大学（0532828）和康奈尔大学（0532854）的研究人员的合作，他们正在开发和部署元数据注册服务，以补充NSDL中央元数据存储库。该注册中心基于开源的都柏林核心元数据倡议（DCMI）注册中心应用程序，并使多个不同的集合提供者和其他NSDL项目能够识别、声明和发布其元数据模式（元素/属性集）和方案（受控词汇表）。此外，该项目提供了对人类和机器代理使用的方案和模式的注册支持，以及对这些方案（语义映射）和模式（人行横道）中术语和概念之间关系的机器映射的支持。该项目的智力价值在于其使用分布式注册表的元数据方案和模式，以改善服务，用户在日益异构的Web数字图书馆宇宙，它指出了一个环境，不同的社区和他们的词汇之间的重要语义连接有效地启用。该项目更广泛的影响是其对登记册软件的推广和实施，超越了中央控制的元数据模式。这使得能够将适当的控制和管理权分配给词汇创建者和维护者，从而有助于克服经济和法律的障碍，这些障碍阻碍了登记册和分布式登记册网络的预期增长。

This Services track project is a collaboration of investigators from the University of Washington (0532828) and Cornell University (0532854) who are developing and deploying a metadata registry service to complement the NSDL Central Metadata Repository. The registry is based on the open-source Dublin Core Metadata Initiative (DCMI) Registry application and enables multiple diverse collection providers and other NSDL projects to identify, declare, and publish their metadata schemas (element/property sets) and schemes (controlled vocabularies). Furthermore, the project provides support for registration of schemes and schemas for use by human and machine agents, as well as support for the machine mapping of relationships among terms and concepts in those schemes (semantic mappings) and schemas (crosswalks). The intellectual merit of the project lies in its use of distributed registries of metadata schemes and schemas to improve services to users in an increasingly heterogeneous Web digital library universe; and it points to an environment where important semantic connections between diverse communities and their vocabularies are effectively enabled. The broader impact of the project is its generalization of registry software and implementation beyond centrally controlled metadata schemas. This enables the distribution of appropriate control and management into the hands of vocabulary creators and maintainers, thus facilitating the potential to overcome economic and legal barriers that have prevented the anticipated growth of registries and distributed registry networks.