虽然任何有效的OWL文档都可用作分类系统，但目前Registry and Repository中仅利用了OWL表达能力的一个很小子集。

While any valid OWL document can be used as a Classification system, at this point in time Registry and Repository exploits only a small subset of the expressiveness of OWL.

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IBM提供了关于WebSphere和DB 2 UDB管理的综合性文档，包括从安装测试系统到构建具有高可用性支持的大型群集的各种内容。

IBM has comprehensive documentation on WebSphere and DB2 UDB administration from setting up a test system to building a huge cluster with high-availability support.

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比如，给定一个DTD(文档类型定义，Document Type Definition)的系统标识符和公共标识符，实体目录(entity catalog)可用于规定XML处理程序从哪里加载dtd。

For example, you can use an entity catalog to specify the location from which an XML processor loads a Document Type Definition (DTD), given the system and public identifiers for that DTD.

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