concept of derived cost 衍生成本概念
DITA includes three information types derived from the base topic type: task, concept, and reference.
DITA包括三种从基本主题类型派生的信息类型：任务、概念和参考。
Still, the underlying concept isn't new; it derived directly from database schemas.
但是背后的概念并不是新的，直接源自数据库模式。
You can also opt to embed graphic ICONS in the document editor view to indicate where tags start and stop (a concept derived from XMetal).
您也可以选择在文档编辑器视图中嵌入图形图标来表明标记开始和停止的位置(源于XMetal的概念)。
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