Every attribute type defines the syntax of the data to be stored as the attribute value.

每个属性类型都以属性值的形式定义被保存的数据的语法。

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With a bit of extra syntax, you can data type your variables for this.

增加一些语法，即可为此确定您的变量的数据类型。

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It includes requirements as they relate to the signature syntax, data model, format, cryptographic processing, and external requirements and coordination.

它包括涉及签名语法、资料模型、格式、密码处理方面的要求，以及外部要求和协调。

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