两个相容的指针，既要有同一的限定修饰词，所指向的类型也要相容的。而两个相容的类型要符合如下规定。

For two pointer types to be compatible, both shall be identically qualified and both shall be Pointers to compatible types.

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每个数据元素名称应该包含数量足够的修饰词和限定词，以便充分描述它(每个基本单词最多有四个修饰词，每个类单词最多有一个修饰词和两个限定词)。

Each data element name shall contain a sufficient number of modifiers and qualifiers to fully describe it (up to four modifiers per prime word and one modifier plus two qualifiers per class word).

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海岸警备队数据元素命名标准中列出了修饰词或限定词示例。

Sample modifiers or qualifiers are listed in Coast Guard Data Element Naming Standards.

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