产品领域：此功能与“产品工厂”函数相关，重点关注用于支持产品创建和生命周期管理的操作产品目录。
Product domain: This functionality is associated with "product factory" functions and focuses on implementation of an operational product catalog to support product creation and lifecycle management.
表函数的功能很强大，因为它可以使任何数据源看起来类似于db2表，然后就可以用于常规的SQL查询、连接操作和分组等。
Table functions are powerful because it can make any data source appear like a DB2 table, which can be then used in normal SQL queries, join operations, grouping, and so on.
XQuery提供了大多数高级语言的所有基本功能(if - then - else、for、变量、函数和算术操作符)。
XQuery has all the rudimentary functionality of most high level languages (if-then-else, for, variables, functions, and arithmetic operators).
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