A schema is a well-formed XML document that USES the powerful XML schema Definition Language (XSD, also sometimes called W3C schema) to model and validate other XML data.

模式是一个格式良好的XML文档，它使用强大的XML模式定义语言(XSDL，有时也叫做W3C Schema)来建模和验证其他XML数据。

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It also has a nice feature called automatic schema migration, which automatically modifies a database table based on differences JBoss finds with a newly deployed application.

它还有一个很棒的功能，称为自动模式迁移，该功能根据JBoss用新部署的应用程序所发现的差别自动修改数据库表。

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For a department-specific table, you can also use the department or company name as schema, of course. To create a table called PERSON in my schema, I have to execute the following SQL command.

当然，对于特定于部门的表，还可以使用部门或公司名作为模式。

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