如果这是一个真实应用程序，您可能会分隔数据库连接脚本和其余部分，并在您的查询中进行各种数据验证。
If this were a real application, you'd probably separate the database connection script from the rest of it and do all kinds of data validation within your query.
XML文档就象微型数据库，而样式表就象脚本，它负责查询和操作来自那些文档数据库的数据。
XML documents are like tiny databases, and the stylesheets are like scripts that query and manipulate the data from those document databases.
如果SIEBEL模式名不是SIEBEL，则应该对脚本和循环中的第一个查询做出相应地修改。
If the SIEBEL schema name is not SIEBEL, then the first query in the script and in the loop should be changed accordingly.
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