In addition, it introduces support for knowledge search and offers unification layers to hide the heterogeneity of data, technology and metadata.
此外，它引入了对知识搜索的支持，并提供统一的层，从而隐藏数据的异质性、技术和元数据。
A hotbed of activity has emerged around how XML content formats and XML-based metadata systems can support learning and instructional technology.
围绕着如何将xml内容格式和基于XML的元数据系统用于支持学习和教育技术，已经出现了一个实践的温床。
The focus of my article introduce the flow of data query and the technology of Mediator, Wrapper, Metadata in management Layer.
本文重点介绍了数据查询流程以及管理层中使用的中介器、包装器、元数据等核心技术。
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