信息技术.ASN.1编码规则:压缩编码规则(PER)的规范

[中文适用范围]： 本建议/国际标准规定了一组打包编码规则（PER），可用于从ITU-T建议X.680 | ISO/IEC 8824-1中定义的类型派生传输语法。这些打包编码规则也应用于解码此类传输语法，以识别正在传输的数据值。本建议/国际标准中规定的编码规则： - 在通信时使用； - 旨在用于将值的表示大小最小化作为选择编码规则主要考虑因素的情况下； - 允许通过添加额外值来扩展抽象语法，保留ITU-T建议X.680 | ISO/IEC 8824-1中描述的所有形式的扩展的现有值的编码； - 可根据ITU-T建议X.695 | ISO/IEC 8825-6的规定进行修改。 [外文原描述]： ISO/IEC 8825-2:2008 specifies a set of Packed Encoding Rules that can be used to derive a transfer syntax for values of types defined in ISO/IEC 8824-1. These Packed Encoding Rules can also be applied for decoding such a transfer syntax in order to identify the data values being transferred. The encoding rules specified in ISO/IEC 8825-2:2008: are used at the time of communication; are intended for use in circumstances where minimizing the size of the representation of values is the major concern in the choice of encoding rules; allow the extension of an abstract syntax by addition of extra values, preserving the encodings of the existing values, for all forms of extension described in ISO/IEC 8824-1; can be modified in accordance with the provisions of ISO/IEC 8825-6.