To overcome this restriction and to maximize the flexibility of a relational database system, DB2 V9.5 introduces the concept of global variables.

为克服这种约束并最大化实现关系数据库系统的灵活性，DB2 V9.5 引入了全局变量的概念。

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You can extend a global type definition by using the xs: extension element or restrict it by using the xs: restriction element.

您可以通过使用xs： extension元素扩展全局类型定义，也可以通过使用xs： restriction元素限制它。

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Another challenge is the global outreach restriction due to geographical factors and limitation due to the current information technology infrastructure.

另一个挑战是全球推广的限制，是由于地理因素和目前的信息技术基础设施的限制。

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This restriction defeats the entire purpose of global fund management, which is to provide investors in each country with an international selection of investment options, preferably drawing on managers in a number of different locations.

ECONOMIST: Local restrictions permitting