From a design point of view, it helps to concentrate on the role of XML documents, rather than on their structure.

从设计的观点来看，这有助于把焦点放在XML文档的角色上，而不是放在它们的结构上。

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In order to use the role notation you will need to use the Internal Structure notation, discussed next.

为了使用角色记号，你将会需要使用下面讨论的内部结构记号。

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The "Copy project" command copies the structure of the project, such as the role definitions, phases and iterations, and work configurations.

“复制项目”命令复制项目的结构，例如，角色定义，阶段和迭代，工作配置。

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Richard Rockefeller spoke of the essential role of philanthropy in strengthening the fabric of society, and the role of a responsible estate tax structure in providing incentives for giving.

FORBES: Warren Buffett And George Soros Want Higher Estate Tax Than Obama Proposes

One of the key discoveries has been the role Saturn's moons play in maintaining the order and structure of the rings.

BBC: Saturn's beauty and power

One of the original managers, Mossadiq Umedaly, vice-president and finance director, left in June because there was no role for him in the new structure.

ECONOMIST: Fuel cells: Intel on wheels | The