Oracle 10g came with some improvements to manage XML documents; for example, changes in schema can be dynamically reflected by mapping existing data without the need to re-import.
Oracle 11g 为管理 XML 文档提供了一些改进；例如，通过映射已有的数据，可以动态地反映模式的更改，而不必重新导入。
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When it does, I usually delete the disks from the server with rmdev -dl, re-detect them with CFGMGR, and then export and re-import the volume group.