本建议|国际标准规定了一套基本的XML编码规则（basic-XER），可用于为建议ITU-T X.680 | ISO/IEC 8824-1和建议ITU-T X.681 | ISO/IEC 8824-2中定义的类型的值推导传输语法。本建议|国际标准还规定了一组规范的XML编码规则（CXER），这些规则对基本的XML编码规则提供约束，并为任何给定的ASN生成唯一的编码。1.价值观。该建议|国际标准进一步规定了一组扩展XML编码规则（extended-XER），该规则添加了更多编码器选项，并允许ASN。1个说明符，用于改变BASIC-XER生成的编码。这些编码规则的规范中隐含着它们也用于解码。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This Recommendation | International Standard specifies a set of basic XML Encoding Rules (BASIC-XER) that may be used to derive a transfer syntax for values of types defined in Rec. ITU-T X.680 | ISO/IEC 8824-1 and Rec. ITU-T X.681 | ISO/IEC 8824-2. This Recommendation | International Standard also specifies a set of Canonical XML Encoding Rules (CXER) which provide constraints on the basic XML Encoding Rules and produce a unique encoding for any given ASN.1 value. This Recommendation | International Standard further specifies a set of extended XML Encoding Rules (EXTENDED-XER) which adds further encoders options, and also allows the ASN.1 specifier to vary the encoding that would be produced by BASIC-XER. It is implicit in the specification of these encoding rules that they are also used for decoding.All current amendments available at time of purchase are included with the purchase of this document.